230 results on '"D. Lüke"'
Search Results
2. DSTAR+/- PRODUCTION BY E+E- ANNIHILATION NEAR 34.4 GEV CM ENERGY
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P. Leu, D. Lüke, D.W. Schmitz, P. J. Dornan, A. J. Campbell, R. Fohrmann, H. Hartmann, D. Strom, B. Löhr, R. J. Cashmore, U. Kötz, Gl Salmon, T. Barklow, J. Harvey, R.C.E. Devenish, H. Siebke, P. Joos, K. Lübelsmeyer, D. A. Garbutt, E. Hilger, M. Dittmar, G. Rudolph, D. Hochman, T. R. Wyatt, J. Proudfoot, A. Ladage, F. J. Kirschfink, Ehud Duchovni, G. Yekutieli, H. Kück, E. Wicklund, J. McCardle, R. Riethmüller, P. E. L. Clarke, D. Heyland, T. D. Jones, K. W. Bell, P. Mättig, A. Shapira, D. Trines, K. Gather, Y. Eisenberg, Lan Wu Sau Lan Wu, D. H. Saxon, Juergen Thomas, W. Braunschweig, W. Wallraff, Hermann Kolanoski, C. Youngman, D. Pandoulas, G. Mikenberg, M. Wollstadt, W. Koch, Joseph Izen, J. K. Sedgbeer, A. M. Rushton, R. Beuselinck, Hl Krasemann, D. R. Quarrie, H. M. Fischer, W. G. Jones, Walter Dr. Hillen, R. Wedemeyer, G. Poelz, R. Mir, G. Peise, H. Venkataramania, I. C. Brock, M. Althoff, D. Notz, Georg Zobernig, J. Pyrlik, Stephen Lloyd, P. L. Woodworth, K. H. Mess, E. Lohrmann, J. Rimkus, U. Karshon, P. Grossmann, M. G. Bowler, Gy. Wolf, B. Foster, D. M. Binnie, H. U. Martyn, W. Schütte, Norbert Wermes, M. Holder, I. Al-Agil, H. Hultschig, D. Revel, H. Burkhardt, B. H. Wiik, L. Köpke, M. Cherney, John Hart, H. G. Sander, E.E. Ronat, G. Knop, and H. Kowalski
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Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Particle physics ,Annihilation ,Pion ,Meson ,Neutral current ,Branching fraction ,Electron–positron annihilation ,Hadron ,Charm quark - Abstract
D∗± production via e+e−→D∗±X has been measured at an average CM energy of 34.4 GeV. The D∗± energy spectrum is hard, with a maximum near χ = 0.6. The size of the D∗ cross section, R D ∗ = σ( e + e − → D ∗ X ) σ μμ = 2.50 ± 0.64 ± 0.88 (assuming R D ∗0 = R D ∗+ ) indicates that a large fraction of charm quark production yields D∗ mesons. The D∗± angular distribution exhibits a forward—backward asymmetry, A = −0.28 ± 0.13. This is consistent with that expected in the standard theory for weak neutral currents and leads to |gAc| = 0.89 ± 0.44 for the axial vector coupling of the charm quark.
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- 2016
3. AN IMPROVED MEASUREMENT OF ELECTROWEAK COUPLINGS FROM E+E--]E+E- AND E+E--]MU+MU
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K. Lübelsmeyer, H. M. Fischer, Gl Salmon, M. Wollstadt, R. J. Cashmore, T. D. Jones, H. U. Martyn, T. Barklow, Walter Dr. Hillen, D. H. Saxon, D. Trines, E.E. Ronat, W. Koch, G. Peise, H. Siebke, B. Foster, D. M. Binnie, U. Kötz, Guenter Wolf, M. Althoff, D. Notz, G. Poelz, J. McCardle, D. A. Garbutt, T. R. Wyatt, Michael Dittmar, G. Yekutieli, R.C.E. Devenish, Georg Zobernig, A. Jocksch, Y. Eisenberg, G. Knop, W. Braunschweig, T. Kracht, D. Strom, W. Wallraff, H. Hartmann, Hermann Kolanoski, J. K. Sedgbeer, M. Rushton, A. Shapira, Norbert Wermes, K. Gather, A. Ladage, G. Rudolph, H. Kück, H. Kowalski, H. Venkataramania, J. Harvey, J. Proudfoot, R. Wedemeyer, H. Burkhardt, J. Pyrlik, C. Youngman, I. C. Brock, G. Mikenberg, D. K. Hasell, E. Hilger, R. Beuselinck, A. Caldwell, Ch. Xiao, C. Jenkins, Ehud Duchovni, D. Pandoulas, Joseph Izen, M. G. Bowler, D. R. Quarrie, F. J. Kirschfink, M. Holder, P. Grossmann, B. Löhr, H. Hultschig, K. W. Bell, P. Mättig, P. Joos, W. G. Jones, P. L. Woodworth, J. Rimkus, B. H. Wiik, W. Schütte, John Hart, E. Wicklund, Sau Lan Wu, W. A. T. Wan Abdullah, Fernando Barreiro, P. E. L. Clarke, P. Rosskamp, M. Mermikides, D. Revel, R. Mir, Hl Krasemann, L. Köpke, M. Cherney, E. Lohrmann, B. Neumann, H. G. Sander, D.W. Schmitz, U. Karshon, P. J. Dornan, A. J. Campbell, R. Fohrmann, Juergen Thomas, D. Lüke, S. L. Llyod, and P. Leu
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Physics ,Particle physics ,Muon ,Physics and Astronomy (miscellaneous) ,High Energy Physics::Phenomenology ,Electroweak interaction ,Elementary particle ,Weinberg angle ,Fermion ,Nuclear physics ,Pair production ,High Energy Physics::Experiment ,Engineering (miscellaneous) ,Bhabha scattering ,Lepton - Abstract
We present an analysis of electroweak leptonic couplings from high statistics experiments on Bhabha scattering and μ pair production at an energy of 34.5 GeV. The forward-backward charge asymmetry of the μ pairs was measured to be −0.098±0.023±0.005. The data were found to agree well with the standard theory of electroweak interaction giving sin2θW=0.27±0.07. The leptonic weak couplings were determined to begv=0.000±0.170 andgA=−0.481±0.055. The data were also used to investigate a class of composite models for leptons.
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- 2016
4. A STUDY OF 3-JET EVENTS IN E+E- ANNIHILATION INTO HADRONS AT 34.6 GEV CM ENERGY
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G. Baranko, Y. Eisenberg, W. Braunschweig, A. Caldwell, C. M. Hawkes, Stephen Lloyd, V. Mertens, Michael Dittmar, G. Yekutieli, R. Mir, P. Mättig, D. K. Hasell, K. W. Bell, H. Kowalski, M. Holder, D. M. Binnie, H. Siebke, H. Hultschig, M. Takashima, Wolfram Dietrich Zeuner, E. Bernardi, John Hart, Joseph Izen, D. H. Saxon, H. M. Fischer, G. Poelz, Ehud Duchovni, R. Rosskamp, D. Trines, S. L. Wu, B. Löhr, R.C.E. Devenish, A. Eskreys, H. Venkataramania, Georg Zobernig, P. Joos, B. Foster, D. Strom, J. Pyrlik, E. Hilger, U. Karshon, G. Mikenberg, H. Hartmann, G. P. Heath, Hl Krasemann, W. Wallraff, Philip Bull, M. G. Bowler, W. G. Jones, Stephanie Brandt, E. Lohrmann, A. Montag, E. Wicklund, M. Cherney, D. J. Mellor, R. Wedemeyer, G. Rudolph, J. Jocksch, K. U. Pösnecker, B. Neumann, H. U. Martyn, Luis Labarga, M. Althoff, J. Thomas, J. Eisenmann, A. T. Wood, D. Notz, P. D. Dauncey, T. Tymieniecka, G. Kreutz, A. Shapira, U. Kötz, D. Su, W. Schütte, A. Ladage, Fernando Barreiro, D. A. Garbutt, Gy. Wolf, F. J. Kirschfink, M. Mermikides, D. Revel, E.E. Ronat, G. E. Forden, G. Knop, C. Jenkins, Rj Cashmore, T. Kracht, D. Lüke, S. Ritz, K. Gather, E. Ros, Boaz Klima, W. A. T. Wan Abdullan, D. Pandoulas, M. Hildebrandt, H. Kück, D.W. Schmitz, P. J. Dornan, R. Fohrmann, Hermann Kolanoski, and J. K. Sedgbeer
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Physics ,Quantum chromodynamics ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,Astrophysics::High Energy Astrophysical Phenomena ,Electron–positron annihilation ,Nuclear Theory ,Quark model ,Hadron ,Elementary particle ,Gluon ,Nuclear physics ,Color model ,High Energy Physics::Experiment ,Nuclear Experiment ,Engineering (miscellaneous) - Abstract
Three-jet events produced by e+e- annihilation into hadrons at 34.6 GeV c.m. energy were studied by comparing them with 2nd order QCD and two different models of fragmentation. The distribution of low energy particles in the 3-jet plane is found to be better described by the LUND color string model than by the independent jet model. The opposite is true for more energetic particles flowing between the 3 jets. The average transverse momenta in jets can be described with values of σq between 350 and 500 MeV/c for the gluon jet. © 1985 Springer-Verlag.
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- 2016
5. SEARCH FOR NEW SEQUENTIAL LEPTONS IN E+E- ANNIHILATION AT PETRA ENERGIES
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John Freeman, M. Ogg, Walter Dr. Hillen, D. M. Binnie, G. Peise, H. Hartmann, F. J. Kirschfink, W. Wallraff, H. M. Fischer, W. Koch, J. Proudfoot, H. Hultschig, B. H. Wiik, T. Barklow, S. Yarker, P. J. Dornan, G. Poelz, G. Rudolph, D. G. Cassel, E. Hilger, E.E. Ronat, R. Rüsch, Rj Cashmore, J. Pyrlik, H. Boerner, G. Knop, D. Heyland, R. A. Stern, Ehud Duchovni, D. H. Saxon, P. Joos, R.C.E. Devenish, R. Brandelik, E. Wicklund, M. A. Downie, D.W. Schmitz, J. C. Hart, P. Mättig, John Illingworth, R. Wedemeyer, AS von Dratzig, P. L. Woodworth, O. Römer, Gl Salmon, T. Meyer, Kadansky, J. Rimkus, H. Kowalski, R. Riethmüller, D. Trines, A. Ladage, Stephen Lloyd, H. G. Sander, K. Lübelsmeyer, P. Söding, Gy. Wolf, P. Koehler, R. Fohrmann, L. Koepke, Hermann Kolanoski, U. Karshon, Y. Eisenberg, P. Grossmann, U. Kötz, H. Burkhardt, D. Notz, S Lan Wu, I. C. Brock, G Zobernig, C. Youngman, A. Shapira, D. A. Garbutt, W. G. Jones, Kw Bell, P. Schmüser, M. Holder, K. Gather, I. Al-Agil, D. Revel, P. Leu, D. Lüke, G. Mikenberg, W. Braunschweig, P. Lecomte, B. Foster, J. Sedgbeer, H. L. Lynch, T. R. Wyatt, D. Pandoulas, Hu Martyn, Quarrie, M. Wollstadt, and N Wermes
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Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Annihilation ,Lepton - Published
- 2016
6. CHARGED PION-PRODUCTION IN E+E- ANNIHILATION AT 14,22 AND 34 GEV CM ENERGY
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Ehud Duchovni, Juergen Thomas, K. H. Mess, R.C.E. Devenish, P. Leu, Hl Krasemann, Gl Salmon, R. Wedemeyer, G. Rudolph, T. Meyer, D. Trines, RA Stern, D. Lüke, T. Barklow, Kw Bell, A. Ladage, P. Schmüser, G. Mikenberg, Hermann Kolanoski, Walter Dr. Hillen, G. Peise, W. Braunschweig, H. Hartmann, W. Koch, S. L. Wu, J. Pyrlik, E. Hilger, R. Carnegie, M. Wollstadt, P. Lecomte, H. Hultschig, G. Poelz, B. H. Wiik, B. Foster, D. Heyland, J. Sedgbeer, Gy. Wolf, D.W. Schmitz, P. Koehler, J. Proudfoot, P. J. Dornan, R. Brandelik, D. Notz, A. J. Campbell, L. Köpke, M. G. Bowler, R. Fohrmann, R. Beuselinck, J. Rimkus, H. Burkhardt, John Freeman, S. Cooper, N Wermes, M. Ogg, A. Shapira, H. G. Sander, D. M. Binnie, B. Löhr, P. Joos, U. Kötz, D. A. Garbutt, E. Wicklund, K. Lübelsmeyer, P. Söding, John Illingworth, P. L. Woodworth, O. Römer, W. G. Jones, M. Holder, K. Gather, T. R. Wyatt, W. Wallraff, D. Revel, Y. Eisenberg, R. Rüsch, C. Youngman, J. Harvey, H. Boerner, I. C. Brock, Rj Cashmore, G Zobernig, P. Grossmann, T. D. Jones, R. Riethmüller, H. Kowalski, D. H. Saxon, I. Al-Agil, U. Karshon, D. Pandoulas, E.E. Ronat, J. C. Hart, Sl Lloyd, G. Knop, H. M. Fischer, F. J. Kirschfink, S Yarker, H. L. Lynch, P. Mättig, Hu Martyn, and Quarrie
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Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Particle physics ,Annihilation ,Meson ,Electron–positron annihilation ,Astrophysics::High Energy Astrophysical Phenomena ,Hadron ,Nuclear Theory ,Nuclear physics ,Pion ,High Energy Physics::Experiment ,Nuclear Experiment ,Energy (signal processing) - Abstract
The inclusive production of π ± mesons in e + e − annihilation has been measured at c.m. energies of 14, 22 and 34 GeV for pion momenta between 0.3 ans 10 GeV/ c . The fraction of pions among the charged hadrons is above 90% at 0.4 GeV/ c and decreases to about 50% at high momenta. The scaled cross sections ( s β ) d σ d x at 14, 22 and 34 GeV as well as the 5.2 GeV data from DASP have a rather similar x dependence. After integration over the x range from 0.2 to 0.6 the cross sections indicate a monotonic decrease with increasing centre-of-mass energy.
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- 2016
7. STRANGE MESON PRODUCTION IN E+E- ANNIHILATION
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Janusz Chwastowski, M. E. Veitch, B. Löhr, P. Joos, B. Foster, M. Takashima, D. H. Saxon, Eduardo Ros, R. J. Cashmore, Ian R Tomalin, P. Mättig, A. Leites, D. Muller, Fernando Barreiro, D. Strom, J. M. Pawlak, G. Poelz, A. Caldwell, John Hassard, A. Montag, J. Krüger, H. Hartmann, T. Kracht, J. Del Peso, D. Revel, K. Gather, G. Mikenberg, E. Hilger, D. Trines, A. Watson, R. Wedemeyer, D. Notz, H. M. Fischer, U. Karshon, Luis Hervas, D. Su, N. Wainer, Guenter Wolf, A. Ladage, A. J. Martin, Hermann Kolanoski, E. Lohrmann, J. Shulman, Georg Zobernig, Wolfram Dietrich Zeuner, K. U. Pösnecker, A. Shapira, A. Eskreys, L. Labarga, G. Yekutieli, Y. Eisenberg, R. Walczak, K. Genser, M. G. Bowler, W. Braunschweig, A. Jocksch, D. Lüke, S. Ritz, Philip Burrows, R. Gerhards, F. J. Kirschfink, M. Holder, H. Hultschig, John Hart, Sau Lan Wu, J. Fdez de Trocóniz, E.E. Ronat, G. Cases, Jens Hartmann, E. Bernardi, Stephanie Brandt, H. Kowalski, and H. U. Martyn
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Physics ,Particle physics ,Annihilation ,Meson production ,Physics and Astronomy (miscellaneous) ,Meson ,Nuclear Theory ,Multiplicity (mathematics) ,Sphericity ,Nuclear physics ,Rapidity ,High Energy Physics::Experiment ,Nuclear Experiment ,Engineering (miscellaneous) - Abstract
The full TASSO data have been used to study the inclusive production of strange mesons in e+e- annihilations. Differential and total cross sections have been measured in the centre of mass energy range 14 to 44 GeV for K0, {Mathematical expression} and 34.5 to 44 GeV for K*± (892). We have investigated the strange meson production properties in jets by studying the rapidity and pt2 distributions as well as the evolution of the multiplicities as a function of the event sphericity. We find no evidence that the strange meson yields increase with increasing sphericity faster than the total charged multiplicity. © 1990 Springer-Verlag.
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- 2016
8. EXTRACTION OF THE GLUON DENSITY OF THE PROTON AT X
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M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R.L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari, A. Polini, G. Sartorelli, R. Timellini, Y. Zamora Garcia, A. Zichichi, A. Bargende, J. Crittenden, K. Desch, B. Diekmann, T. Doeker, M. Eckert, L. Feld, A. Frey, M. Geerts, G. Geitz, M. Grothe, H. Hartmann, D. Haun, K. Heinloth, E. Hilger, H.-P. Jakob, U.F. Katz, S.M. Mari, A. Mass, S. Mengel, J. Mollen, E. Paul, Ch. Rembser, R. Schattevoy, D. Schramm, J. Stamm, R. Wedemeyer, S. Campbell-Robson, A. Cassidy, N. Dyce, B. Foster, S. George, R. Gilmore, G.P. Heath, H.F. Heath, T.J. Llewellyn, C.J.S. Morgado, D.J.P. Norman, J.A. O'Mara, R.J. Tapper, S.S. Wilson, R. Yoshida, R.R. Rau, M. Arneodo, L. Iannotti, M. Schioppa, G. Susinno, A. Bernstein, A. Caldwell, J.A. Parsons, S. Ritz, F. Sciulli, P.B. Straub, L. Wai, S. Yang, P. Borzemski, J. Chwastowski, A. Eskreys, K. Piotrzkowski, M. Zachara, L. Zawiejski, L. Adamczyk, B. Bednarek, K. Eskreys, K. Jelén, D. Kisielewska, T. Kowalski, E. Rulikowska-Zarȩbska, L. Suszycki, J. Zaja̧c, T. Kȩdzierski, A. Kotański, M. Przybycień, L.A.T. Bauerdick, U. Behrens, J.K. Bienlein, S. Böttcher, C. Coldewey, G. Drews, M. Flasiński, D.J. Gilkinson, P. Göttlicher, B. Gutjahr, T. Haas, W. Hain, D. Hasell, H. Heβling, H. Hultschig, Y. Iga, P. Joos, M. Kasemann, R. Klanner, W. Koch, L. Köpke, U. Kötz, H. Kowalski, W. Kröger, J. Krüger, J. Labs, A. Ladage, B. Löhr, M. Löwe, D. Lüke, O. Mańczak, J.S.T. Ng, S. Nickel, D. Notz, K. Ohrenberg, M. Roco, M. Rohde, J. Roldán, U. Schneekloth, W. Schulz, F. Selonke, E. Stiliaris, T. Voβ, D. Westphal, G. Wolf, C. Youngman, H.J. Grabosch, A. Leich, A. Meyer, C. Rethfeldt, S. Schlenstedt, G. Barbagli, P. Pelfer, G. Anzivino, G. Maccarrone, S. De Pasquale, S. Qian, L. Votano, A. Bamberger, A. Freidhof, T. Poser, S. Söldner-Rembold, J. Schroeder, G. Theisen, T. Trefzger, N.H. Brook, P.J. Bussey, A.T. Doyle, I. Fleck, V.A. Jamieson, D.H. Saxon, M.L. Utley, A.S. Wilson, A. Dannemann, U. Holm, D. Horstmann, H. Kammerlocher, B. Krebs, T. Neumann, R. Sinkus, K. Wick, E. Badura, B.D. Burow, A. Fürtjes, L. Hagge, E. Lohrmann, J. Mainusch, J. Milewski, M. Nakahata, N. Pavel, G. Poelz, W. Schott, J. Terron, F. Zetsche, T.C. Bacon, R. Beuselinck, I. Butterworth, E. Gallo, V.L. Harris, B.H. Hung, K.R. Long, D.B. Miller, P.P.O. Morawitz, A. Prinias, J.K. Sedgbeer, A.F. Whitfield, U. Mallik, E. McCliment, M.Z. Wang, S.M. Wang, J.T. Wu, Y. Zhang, P. Cloth, D. Filges, S.H. An, S.M. Hong, S.W. Nam, S.K. Park, M.H. Suh, S.H. Yon, R. Imlay, S. Kartik, H.-J. Kim, R.R. McNeil, W. Metcalf, V.K. Nadendla, F. Barreiro, G. Cases, R. Graciani, J.M. Hernández, L. Hervás, L. Labarga, J. del Peso, J. Puga, J.F. de Trocóniz, F. Ikraiam, J.K. Mayer, G.R. Smith, F. Corriveau, D.S. Hanna, J. Hartmann, L.W. Hung, J.N. Lim, C.G. Matthews, P.M. Patel, L.E. Sinclair, D.G. Stairs, M. St.Laurent, R. Ullmann, G. Zacek, V. Bashkirov, B.A. Dolgoshein, A. Stifutkin, G.L. Bashindzhagyan, P.F. Ermolov, L.K. Gladilin, Y.A. Golubkov, V.D. Kobrin, V.A. Kuzmin, A.S. Proskuryakov, A.A. Savin, L.M. Shcheglova, A.N. Solomin, N.P. Zotov, S. Bentvelsen, M. Botje, F. Chlebana, A. Dake, J. Engelen, P. de Jong, M. de Kamps, P. Kooijman, A. Kruse, V. O'Dell, A. Tenner, H. Tiecke, W. Verkerke, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg, D. Acosta, B. Bylsma, L.S. Durkin, K. Honscheid, C. Li, T.Y. Ling, K.W. McLean, W.N. Murray, I.H. Park, T.A. Romanowski, R. Seidlein, D.S. Bailey, G.A. Blair, A. Byrne, R.J. Cashmore, A.M. Cooper-Sarkar, D. Daniels, R.C.E. Devenish, N. Harnew, M. Lancaster, P.E. Luffman, L. Lindemann, J. McFall, C. Nath, A. Quadt, H. Uijterwaal, R. Walczak, F.F. Wilson, T. Yip, G. Abbiendi, A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, J. Bulmahn, J.M. Butterworth, R.G. Feild, B.Y. Oh, J.J. Whitmore, G. D'Agostini, M. Iori, G. Marini, M. Mattioli, A. Nigro, E. Tassi, J.C. Hart, N.A. McCubbin, K. Prytz, T.P. Shah, T.L. Short, E. Barberis, N. Cartiglia, T. Dubbs, C. Heusch, M. Van Hook, B. Hubbard, W. Lockman, J.T. Rahn, H.F.-W. Sadrozinski, A. Seiden, J. Biltzinger, R.J. Seifert, A.H. Walenta, G. Zech, H. Abramowicz, G. Briskin, S. Dagan, A. Levy, T. Hasegawa, M. Hazumi, T. Ishii, M. Kuze, S. Mine, Y. Nagasawa, T. Nagira, M. Nakao, I. Suzuki, K. Tokushuku, S. Yamada, Y. Yamazaki, M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura, S. Nagayama, Y. Nakamitsu, R. Cirio, M. Costa, M.I. Ferrero, L. Lamberti, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano, M. Dardo, D.C. Bailey, D. Bandyopadhyay, F. Benard, M. Brkic, M.B. Crombie, D.M. Gingrich, G.F. Hartner, K.K. Joo, G.M. Levman, J.F. Martin, R.S. Orr, C.R. Sampson, R.J. Teuscher, C.D. Catterall, T.W. Jones, P.B. Kaziewicz, J.B. Lane, R.L. Saunders, J. Shulman, K. Blankenship, J. Kochocki, B. Lu, L.W. Mo, W. Bogusz, K. Charchuł, a, J. Ciborowski, J. Gajewski, G. Grzelak, M. Kasprzak, M. Krzyżanowski, K. Muchorowski, R.J. Nowak, J.M. Pawlak, T. Tymieniecka, A.K. Wróblewski, J.A. Zakrzewski, A.F. Zarnecki, M. Adamus, Y. Eisenberg, C. Glasman, U. Karshon, D. Revel, A. Shapira, I. Ali, B. Behrens, S. Dasu, C. Fordham, C. Foudas, A. Goussiou, R.J. Loveless, D.D. Reeder, S. Silverstein, W.H. Smith, T. Tsurugai, S. Bhadra, W.R. Frisken, and K.M. Furutani
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Nuclear and High Energy Physics ,Particle physics ,Proton ,Nuclear physics ,INELASTIC MUON SCATTERING ,DEUTERON STRUCTURE FUNCTIONS ,ZEUS ,NUCLEON STRUCTURE FUNCTIONS ,HIGH STATISTICS MEASUREMENT ,PARTON DISTRIBUTIONS ,LEADING ORDER ,HIGH Q2 ,PERTURBATION-THEORY ,SCALING VIOLATIONS ,PP COLLISIONS ,Quantum chromodynamics ,Physics ,ZEUS (particle detector) ,Neutral current ,Scattering ,High Energy Physics::Phenomenology ,HERA ,Gluon ,High Energy Physics::Experiment ,Perturbation theory (quantum mechanics) - Abstract
The gluon momentum density xg ( x , Q 2 ) of the proton was extracted at Q 2 = 20 GeV 2 for small values of x between 4 × 10 −4 and 10 −2 from the scaling violations of the proton structure function F 2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F 2 at low x constrained by measurementsfrom NMC at larger x ; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small x in comparison with the NMC result obtained at larger values of x .
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- 2016
9. Angular correlations in γγ→ρ0ρ0 near threshold
- Author
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H. U. Martyn, T. D. Jones, Walter Dr. Hillen, G. Peise, E. Lohrmann, D. Heyland, P. Mättig, Norbert Wermes, R. Carnegie, U. Karshon, R. Riethmüller, D.W. Schmitz, I. C. Brock, P. Schmüser, R.C.E. Devenish, P. J. Dornan, A. J. Campbell, D. Trines, H. Venkataramania, M. G. Bowler, L. Köpke, R. Fohrmann, J. Franzke, S. Cooper, M. Wollstadt, H. Kowalski, J. Harvey, Y. Eisenberg, Juergen Thomas, P. Joos, R. J. Cashmore, J. K. Sedgebeer, H. G. Sander, W. Wallraff, B. Foster, P. E. L. Clarke, D. M. Binnie, Hermann Kolanoski, O. Römer, R. Wedemeyer, E. Wicklund, Hl Krasemann, A. Shapira, W. Schütte, U. Kötz, W. Koch, Stephen Lloyd, K. H. Mess, W. Braunschweig, Gl Salmon, D. Lüke, P. Grossmann, G. Rudolph, D. A. Garbutt, I. Al-Agil, F. J. Kirschfink, H. Siebke, T. Barklow, B. Löhr, H. Hartmann, D. H. Saxon, Ehud Duchovni, T. Meyer, J. McCardle, M. Holder, G. Poelz, J. Pyrlik, H. Hultschig, W. G. Jones, T. R. Wyatt, B. H. Wiik, John Hart, J. Proudfoot, K. Gather, D. Revel, John Illingworth, Sau Lan Wu, D. R. Quarrie, C. Youngman, Gy. Wolf, A. Ladage, M. Althoff, D. Notz, G. Mikenberg, P. L. Woodworth, R. Beuselinck, H. M. Fischer, J. Rimkus, K. Lübelsmeyer, E. Hilger, P. Söding, M. Dittmar, P. Leu, H. Burkhardt, E.E. Ronat, D. Pandoulas, G. Yekutieli, K. W. Bell, G. Knop, H. Boerner, and Georg Zobernig
- Subjects
Physics ,Cross section (geometry) ,Nuclear physics ,Particle physics ,Range (particle radiation) ,Near threshold ,Photon ,Pion ,Physics and Astronomy (miscellaneous) ,Partial wave analysis ,Isotropy ,Invariant mass ,Engineering (miscellaneous) - Abstract
We present an analysis of ρ0ρ0 production by two photons in the ρ0ρ0 invariant mass range from 1.2 to 2.0 GeV. From a study of the angular correlations in the process γγ→ρ0ρ0→π- π+π- we exclude a dominant contribution from JP=0- or 2- states. The data indicate sizeable contributions from JP=0+ for four pion masses M4π1.7 GeV. The data are also well described by a model with isotropic production and uncorrelated isotropic decay of the ρ0,s. The cross section stays high below the nominal ρ0ρ0 threshold, i.e. M4π
- Published
- 2016
10. EVIDENCE FOR DIRECT PHOTONS FROM QUARKS IN ELECTRON-POSITRON ANNIHILATION
- Author
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A. J. Sephton, Y. Eisenberg, R. Walczak, G. E. Forden, B. Bock, W. Braunschweig, T. Kracht, K. U. Pösnecker, A. Shapira, D. Trines, W. Gerhardt, Janusz Chwastowski, J. F. Hassard, Giora Mikenberg, G. Tysarczyk, Stephanie Brandt, G. Yekutieli, Jens Hartmann, H. M. Fischer, A. J. Martin, I. R. Tomalin, Hermann Kolanoski, Fernando Barreiro, Wolfram Dietrich Zeuner, U. Karshon, H. Kowalski, A. Ladage, Georg Zobernig, E. Hilger, D. Su, M. E. Veitch, J. M. Pawlak, K. Gather, I. M. Silvester, P. Rehders, D. Muller, E. Lohrmann, P. Mättig, R. Wedemeyer, J. Shulman, E. Bernardi, H. U. Martyn, D. Revel, G. P. Heath, A. Montag, J. Del Peso, M. Takashima, Eduardo Ros, T. Tymieniecka, A. Eskreys, L. Labarga, Gy. Wolf, J. Krüger, H. Hartmann, Philip Burrows, D. Notz, D. Lüke, S. Ritz, B. Löhr, P. Joos, B. Foster, A. Leites, N. Wainer, D. H. Saxon, P. N. Ratoff, G. Poelz, K. Genser, M. G. Bowler, M. Holder, H. Hultschig, A. Jocksch, John Hart, Sau Lan Wu, R. Gerhards, F. J. Kirschfink, E.E. Ronat, C. Balkwill, and D. Strom
- Subjects
Physics ,Quark ,Particle physics ,Photon ,Physics and Astronomy (miscellaneous) ,Astrophysics::High Energy Astrophysical Phenomena ,media_common.quotation_subject ,Electron–positron annihilation ,Hadron ,Bremsstrahlung ,Jet (particle physics) ,Asymmetry ,Nuclear physics ,Positron ,High Energy Physics::Experiment ,Nuclear Experiment ,Engineering (miscellaneous) ,media_common - Abstract
Hadronic events from e+e--annihilations with a high energy isolated photon have been investigated at C.M. energies between 14 GeV and 44 GeV. A forward-backward asymmetry Aγ of the positively charged jet with respect to the incident positron direction has been found:Aγγ=-0.32±0.07, providing evidence for photon bremsstrahlung from quarks. The forward-backward asymmetry of all hadronic events at C.M. energies between 30 GeV and 36 GeV has been measured. The value, corrected for the limited polar angle acceptance of the detector, is:A=+0.021±0.005. © 1988 Springer-Verlag.
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- 2016
11. GLOBAL JET PROPERTIES AT 14-44 GEV CENTER OF MASS-ENERGY IN E+E- ANNIHILATION
- Author
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D. H. Saxon, R. Gerhards, Rj Cashmore, B. Löhr, U. Karshon, P. Joos, Luis Hervas, B. Foster, Fernando Barreiro, E.E. Ronat, A. Caldwell, Eduardo Ros, H. Kowalski, M. Takashima, A. Ladage, A. Eskreys, M. Holder, H. Hultschig, Janusz Chwastowski, E. Lohrmann, D. Trines, John Hart, Sau Lan Wu, Philip Burrows, A. Jocksch, J. M. Pawlak, D. Notz, H. M. Fischer, N. Wainer, A. J. Martin, K. Genser, Stephanie Brandt, M. G. Bowler, J. Krüger, K. U. Pösnecker, R. Wedemeyer, H. Hartmann, D. Strom, H. U. Martyn, Hermann Kolanoski, F. J. Kirschfink, J. Shulman, Wolfram Dietrich Zeuner, Georg Zobernig, E. Hilger, D. Lüke, S. Ritz, Gy. Wolf, M. E. Veitch, Ian R Tomalin, P. Mättig, J. F. Hassard, D. Muller, G. Cases, E. Bernardi, Jens Hartmann, D. Su, D. Revel, A. Montag, J. Del Peso, Y. Eisenberg, R. Walczak, W. Braunschweig, and G. Poelz
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Physics ,Jet (fluid) ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,Electron–positron annihilation ,Hadron ,Elementary particle ,Charged particle ,Nuclear physics ,Momentum ,High Energy Physics::Experiment ,Center of mass ,Nuclear Experiment ,Engineering (miscellaneous) - Abstract
Jet properties ine + e − annihilation at center of mass energies of 14, 22, 35 and 43.7 GeV were studied with the data collected in the TASSO detector at PETRA, using the same evaluation procedures for all the energies. The total hadronic cross section ratio for the center of mass energy interval 39–47 GeV was determined to be ℛ=4.11±0.05 (stat)±0.18(syst.) at $$\langle \sqrt s \rangle = 43 - 7$$ GeV. Corrected distributions of global shape variables are presented as well as the inclusive charged particle distributions for scaled momentum and transverse momentum. The center of mass energy evolution of the average sphericity, thrust, aplanarity and particle momentum is shown.
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- 2016
12. E+E- ANNIHILATION AT HIGH-ENERGIES AND SEARCH FOR THE T-QUARK CONTINUUM CONTRIBUTION
- Author
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H. M. Fischer, D. G. Cassel, P. Koehler, Rj Cashmore, John Freeman, M. Ogg, A. Schultz von Dratzig, B. Löhr, D. M. Binnie, E. Hilger, P. Joos, D. Heyland, D. Notz, E.E. Ronat, D.W. Schmitz, John Illingworth, G. Knop, R. Brandelik, Walter Dr. Hillen, P. L. Woodworth, G. Peise, J. Pyrlik, Gl Salmon, H. L. Lynch, A. Pevsner, M. Wollstadt, N Wermes, J. Rimkus, B. Roe, G. Wolff, O. Römer, H. Kowalski, D. H. Saxon, R. Fohrmann, T. Meyer, S. Yarker, P. Mättig, N. A. Downie, D. Trines, U. Kötz, Kw Bell, A. Ladage, P. Schmüser, B. Foster, H. Hartmann, D. A. Garbutt, D. R. Quarrie, J. Sedgbeer, D. Revel, J. C. Hart, P. Leu, W. Wallraff, W. G. Jones, M. Holder, J. Ringel, W. Chinowsky, K. Gather, D. Pandoulas, Y. Eisenberg, D. Lüke, G Zobernig, C. Youngman, G. Mikenberg, W. Koch, Hu Martyn, Stephen Lloyd, G. Poelz, H. G. Sander, H. Boerner, R. Riethmüller, J. Proudfoot, V. Kadansky, R. Rüsch, K. Lübelsmeyer, P. Söding, W. Braunschweig, P. Lecomte, U. Karshon, A. Shapira, Roger Barlow, M. Schliwa, R. Wedemeyer, H. Hultschig, B. H. Wiik, Sau Lan Wu, and P. J. Dornan
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Physics ,Nuclear physics ,Top quark ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,Electron–positron annihilation ,Nuclear fusion ,High Energy Physics::Experiment ,Continuum (set theory) ,Nuclear Experiment ,Engineering (miscellaneous) ,Sphericity - Abstract
Measurements of R, sphericity and thrust are presented for c.m. energies between 12 and 31.6 GeV. A possible contribution of a t {Mathematical expression} continuum can be ruled out for c.m. energies between 16 and 31 GeV. © 1980 Springer-Verlag.
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- 2016
13. COMPARISON OF INCLUSIVE FRACTIONAL MOMENTUM DISTRIBUTIONS OF QUARK AND GLUON JETS PRODUCED IN E+E- ANNIHILATION
- Author
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H. Hartmann, M. Holder, Eduardo Ros, R. J. Cashmore, John Hart, D. Notz, Sau Lan Wu, M. Takashima, U. Karshon, Fernando Barreiro, G. Yekutieli, D. Trines, H. Kowalski, Janusz Chwastowski, E. Hilger, E.E. Ronat, H. Hulschig, B. Bock, Y. Eisenberg, E. Lohrmann, D. Strom, T. Kracht, R. Walczak, W. Braunschweig, D. Revel, G. Poelz, K. Genser, Hermann Kolanoski, E. Bernardi, Guenter Wolf, John Hassard, K. U. Pösnecker, Stephanie Brandt, A. Montag, Philip Burrows, K. Gather, J. Del Peso, J. Shulman, G. Mikenberg, H. M. Fischer, R. Gerhards, A. Ladage, H. U. Martyn, Jens Hartmann, A. J. Martin, J. M. Pawlak, Georg Zobernig, F. J. Kirschfink, D. Su, G. P. Heath, R. Wedemeyer, Wolfram Dietrich Zeuner, A. Eskreys, M. E. Veitch, Ian R Tomalin, P. Mättig, D. Muller, D. Lüke, S. Ritz, B. Löhr, P. Joos, B. Foster, A. Leites, A. Shapira, N. Wainer, M. G. Bowler, A. Jocksch, D. H. Saxon, and J. Krüger
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Quark ,Physics ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,Astrophysics::High Energy Astrophysical Phenomena ,High Energy Physics::Phenomenology ,Hadron ,Parton ,Jet (particle physics) ,Charged particle ,Gluon ,Nuclear physics ,Momentum ,High Energy Physics::Experiment ,Nuclear Experiment ,Engineering (miscellaneous) - Abstract
Inclusive charged particle production ine + e − annihilation into hadrons is studied in terms of the particle fractional momentumx p . Thex p distribution for gluon jets is extracted by comparing two data samples measured in the TASSO detector: nearly symmetric three jet events at centre-of-mass energyW∼35 GeV and two jet events atW∼22 GeV, yielding quark and gluon jets of similar energies (∼11.5 GeV). No significant difference is observed between quark and gluon jets. Monte Carlo models based on parton showers describe the trend and energy variation of the data better than a model with second order matrix element in α s .
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- 2016
14. A measurement of the proton structure function F-2(x, Q(2)) at low x and low Q(2) at HERA
- Author
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C. Adloff, S. Aid, M. Anderson, V. Andreev, B. Andrieu, V. Arkadov, C. Arndt, I. Ayyaz, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, U. Bassler, H.P. Beck, M. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, G. Bertrand-Coremans, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, K. Borras, F. Botterweck, V. Boudry, S. Bourov, A. Braemer, W. Braunschweig, V. Brisson, W. Brückner, P. Bruel, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M.J. Burton, G. Buschhorn, D. Calvet, A.J. Campbell, T. Carli, M. Charlet, D. Clarke, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, M.-C. Cousinou, B.E. Cox, G. Cozzika, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, C.L. Davis, A. De Roeck, E.A. De Wolf, B. Delcourt, M. Dirkmann, P. Dixon, W. Dlugosz, C. Dollfus, K.T. Donovan, J.D. Dowell, H.B. Dreis, A. Droutskoi, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, E. Elsen, M. Erdmann, A.B. Fahr, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, J. Formánek, J.M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, H. Genzel, R. Gerhards, A. Glazov, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, T. Greenshaw, R.K. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, T. Hadig, D. Haidt, L. Hajduk, T. Haller, M. Hampel, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, K. Hewitt, K.H. Hiller, C.D. Hilton, J. Hladký, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, M. Ibbotson, Ç. İşsever, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jacquet, M. Jaffre, J. Janoth, D.M. Jansen, L. Jönsson, D.P. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, M. Kausch, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, A. Küpper, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Laforge, M.P.J. Landon, W. Lange, U. Langenegger, A. Lebedev, F. Lehner, V. Lemaitre, S. Levonian, M. Lindstroem, F. Linsel, J. Lipinski, B. List, G. Lobo, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, L. Lytkin, N. Magnussen, H. Mahlke-Krüger, E. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, P. Merkel, F. Metlica, A. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, T. Walter, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, I. Négri, P.R. Newman, D. Newton, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, G. Nowak, T. Nunnemann, M. Nyberg-Werther, H. Oberlack, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, S. Passaggio, G.D. Patel, H. Pawletta, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, R. Pöschl, G. Pope, B. Povh, S. Prell, K. Rabbertz, G. Rädel, P. Reimer, H. Rick, S. Riess, E. Rizvi, P. Robmann, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, L. Schoeffel, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, T. Sloan, P. Smirnov, M. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, P. Steffen, R. Steinberg, J. Steinhart, B. Stella, A. Stellberger, J. Stier, J. Stiewe, U. Stöβlein, K. Stolze, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, G. Thompson, P.D. Thompson, N. Tobien, R. Todenhagen, P. Truöl, G. Tsipolitis, J. Turnau, E. Tzamariudaki, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Valĺee, P. Van Esch, P. Van Mechelen, D. Vandenplas, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, R. Wallny, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, S. Wiesand, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, M. Wobisch, H. Wollatz, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, P. Zini, F. Zomer, J. Zsembery, M. zurNedden, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Levy, Jean-Michel, and H1 Collaboration
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Proton ,010308 nuclear & particles physics ,Structure function ,FOS: Physical sciences ,HERA ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear physics ,Momentum ,High Energy Physics - Experiment (hep-ex) ,Cross section (physics) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010306 general physics - Abstract
The results of a measurement of the proton structure function F_2(x,Q^2)and the virtual photon-proton cross section are reported for momentum transfers squared Q^2 between 0.35 GeV^2 and 3.5 GeV^2 and for Bjorken-x values down to 6 10^{-6} using data collected by the HERA experiment H1 in 1995. The data represent an increase in kinematic reach to lower x and Q^2 values of about a factor of 5 compared to previous H1 measurements. Including measurements from fixed target experiments the rise of F_2 with decreasing x is found to be less steep for the lowest Q^2 values measured. Phenomenological models at low Q^2 are compared with the data., Comment: 27 pages, 10 Figures
- Published
- 2016
15. ELECTROWEAK COUPLING-CONSTANTS IN THE LEPTONIC REACTIONS E+E--]E+E- AND E+E--]MU+MU- AND SEARCH FOR SCALAR LEPTONS
- Author
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O. Römer, T. Barklow, H. Kowalski, W. Koch, W. G. Jones, K. Gather, C. Youngman, I. C. Brock, G. Poelz, G. Mikenberg, K. H. Mess, E. Lohrmann, D. M. Binnie, I. Al-Agil, Hu Martyn, Quarrie, U. Karshon, B. Foster, M. Holder, H. Hultschig, Y. Eisenberg, Gy. Wolf, M. G. Bowler, Gl Salmon, J. Sedgbeer, B. H. Wiik, R.C.E. Devenish, T. Meyer, W. Braunschweig, H. Hartmann, R. Wedemeyer, P. J. Dornan, P. Grossmann, H. Boerner, D. Lüke, Ehud Duchovni, A. Ladage, J. Franzke, Norbert Wermes, S. L. Wu, A. Shapira, J. Proudfoot, John Illingworth, U. Kötz, D. Heyland, D.W. Schmitz, T. R. Wyatt, P. L. Woodworth, Juergen Thomas, D. A. Garbutt, H. Burkhardt, A. J. Campbell, E.E. Ronat, W. Schütte, E. Hilger, D. Notz, R. Fohrmann, K. Lübelsmeyer, P. Söding, G. Knop, S. Cooper, M. Wollstadt, R. Carnegie, P. E. L. Clarke, P. Leu, R. Brandelik, D. Pandoulas, D. Revel, J. Rimkus, F. J. Kirschfink, L. Köpke, H. G. Sander, H. L. Lynch, Walter Dr. Hillen, G. Peise, Hl Krasemann, G. Rudolph, B. Löhr, R. Riethmüller, J. Pyrlik, Kw Bell, P. Schmüser, T. D. Jones, J. Harvey, Rj Cashmore, H. M. Fischer, D. H. Saxon, Georg Zobernig, R. Beuselinck, J. C. Hart, Sl Lloyd, P. Mättig, M. Ogg, P. Joos, E. Wicklund, D. Trines, W. Wallraff, and Hermann Kolanoski
- Subjects
Physics ,Coupling constant ,Nuclear and High Energy Physics ,Particle physics ,Muon ,Scalar (mathematics) ,Electroweak interaction ,Weinberg angle ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Nuclear physics ,Pair production ,High Energy Physics::Experiment ,Lepton ,Bhabha scattering - Abstract
A high statistics experiment was performed on Bhabha scattering at energies between 14 and 34 GeV. Good agreement with QED was observed. The combined data on Bhabha scattering and μ pair production were found to agree with the standard theory of electroweak interaction giving sin2 θ = 0.27-0.07+0.06. Assuming for the Z0 mass a value of 90 GeV the leptonic weak coupling constants were determined to gV2 = -0.04 ± 0.06 and gA2 = 0.35 ± 0.09. A search for scalar leptons sets lower limits on the mass of scalar electrons ofMse > 16.6 GeV and of scalar muons of Msμ > 16.4 GeV. © 1982.
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- 2016
16. Search for a narrow baryonic resonance decaying toKs0porKs0p¯in deep inelastic scattering at HERA
- Author
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S. Levonian, A. M. Fomenko, Pierre Marage, Peter Robmann, Stephen Maxfield, C. Gerlich, Paul Laycock, L. Finke, B. Olivier, I. Glushkov, F. Zomer, H-C. Schultz-Coulon, J. Stiewe, Zhen Zhang, D. P. C. Sankey, Y.C. Zhu, K. Daum, Ricardo Lopez-Fernandez, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, Magnus Hansson, M. Del Degan, C. Wissing, Andrew Mehta, J. Bracinik, Ewelina Lobodzinska, Matthew Beckingham, P. Baranov, M. Steder, D. Hoffmann, T. Zimmermann, L. Goerlich, Anna Kropivnitskaya, Roland Horisberger, A. Valkárová, R. Felst, N. Gogitidze, A. Usik, G. Cozzika, T. Toll, V. Michels, W.D. Dau, J. B. Dainton, G. Knies, H. Peng, V. Andreev, S. Backovic, Thorsten Lux, C. Niebuhr, L. Janauschek, David South, T. Kluge, O. Behnke, D. Mladenov, B. R. Grell, S. Egli, V. Jemanov, F. Tomasz, Matthias Ulrich Mozer, J. Zimmermann, H. Lueders, K. Krüger, C. Schmitz, C. Pascaud, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Hannes Jung, Alexander Zhokin, Y. Soloviev, Sergey Rusakov, P. Truöl, V. Lubimov, Dusan Bruncko, J. Becker, C. Vallée, Guenter Eckerlin, E. Barrelet, Z. Rurikova, A. Fedotov, A. W. Jung, B. Naroska, D. Sunar, B. Stella, D. Lüke, Stefan Schmitt, S. Baumgartner, P. E. Reimer, S. Ginzburgskaya, Søren Schmidt, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, K. Krastev, G. Herrera, Bradley Cox, Laurent Schoeffel, A. Dubak, K. H. Hiller, R. C. W. Henderson, G. Leibenguth, Sakar Osman, M. Jacquet, L. Lindfeld, W. Yan, T. Greenshaw, Christoph Grab, Erika Garutti, R. Wolf, K. Urban, K. Nankov, L. N. Shtarkov, E. Wünsch, A. Eliseev, C. Veelken, E. A. De Wolf, Karlheinz Meier, R. Roosen, Anton Babaev, N. Loktionova, J. E. Olsson, W. Bartel, S. Hussain, J. Ferencei, M. Martisikova, G. Thompson, Adrian Perieanu, S. Gorbounov, L. Lytkin, A. Specka, Malte Hildebrandt, Cristinel Diaconu, Vladimir Palichik, J. G. Contreras, A. Mohamed, Georgios Tsipolitis, M. Fleischer, T. Frisson, G. Weber, U. Straumann, A. Aktas, I. Milcewicz-Mika, G. Franke, P. Prideaux, A. Hovhannisyan, Claus Kleinwort, Th. Naumann, J. Žáček, A. Baghdasaryan, A. Rostovtsev, Daniel Pitzl, Wolfgang Lange, R. Weber, F. W. Büsser, O. Behrendt, S. Vinokurova, Y. de Boer, J. Feltesse, J. Gayler, V. Yeganov, D. Traynor, I. Tsurin, Ilias Panagoulias, A. Asmone, F. Moreau, S. J. Aplin, H. Henschel, F. Cassol-Brunner, Bogdan Povh, P. Kostka, F. Sefkow, L. Bystritskaya, J.C. Bizot, P. Van Mechelen, Natasa Raicevic, S. Baudrand, Leif J. Jönsson, Benoit Roland, V. Chekelian, L. Hajduk, D. Utkin, E. Gabathuler, M. Urban, B. List, J. Turnau, B. Portheault, H. U. Martyn, Matthias Klein, Theodora Papadopoulou, S. Essenov, M. Ismail, M. Kapichine, M. Nozicka, Vincent Boudry, Gerhard Brandt, John A Coughlan, E. E. Elsen, I. Tsakov, A. N. Morozov, H. Zohrabyan, D. Perez-Astudillo, M. Gregori, David Milstead, P. A. Smirnov, R. Plačakytė, A. Schöning, E. Rizvi, G. D. Patel, Jan Kretzschmar, B. Delcourt, V. Volchinski, Andrej Liptaj, S. Ghazaryan, Paul Richard Newman, Grzegorz Nowak, Pavel Murin, M. Ibbotson, T. Klimkovich, I. Sheviakov, S. Schätzel, Biljana Antunović, Katerina Lipka, A. Falkewicz, H. Meyer, Emmanuelle Perez, Karel Cerny, Laurent Favart, V. Tchoulakov, R.N. Shaw-West, A. Petrukhin, T. Anthonis, J. Zálešák, Xavier Janssen, V. Spaskov, D.P. Johnson, K. Wacker, A. B. Meyer, Tomas Hreus, R. Eichler, A. Glazov, V. Korbel, Y. Vazdik, N. Malden, I. R. Kenyon, A. Stoilov, G. Laštovička-Medin, Michael R. Wessels, V. Brisson, P.D. Thompson, Stefania Xella, C. Werner, A. Rimmer, J. V. Morris, Jenny List, A. Knutsson, A. Makankine, A.J. Rahmat, A. Bunyatyan, Ll. Marti, G. Buschhorn, D. Ozerov, V. Lendermann, F. Eisele, M.-O. Boenig, S. Mangano, A. Nikiforov, R. Oganezov, Nicolas Berger, R. Marshall, A. Zhelezov, A. Lebedev, F. Salvaire, D. Haidt, A.-I. Lucaci-Timoce, G. Heinzelmann, V. Dodonov, A. D.R. Vargas Trevino, V. Cerny, G. Flucke, Jean-Arcady Meyer, C. Risler, C. Gwilliam, M. P. J. Landon, A. Astvatsatourov, Judith Katzy, B. Wessling, K. Müller, J. Cvach, K. Nowak, M. Goettlich, D. Wegener, V. Efremenko, and S. Mikocki
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Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,Scattering ,Resonance ,Sigma ,HERA ,Deep inelastic scattering ,01 natural sciences ,Pentaquark ,Baryon ,Nuclear physics ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Bar (unit) - Abstract
A search for a narrow baryonic resonance decaying to K(s)(0)p or K-s(0)(p) over bar is carried out in deep inelastic ep scattering with the H1 detector at HERA. ss Such a resonance could be a strange pentaquark Theta(+), evidence for which has been reported by several experiments. The K(s)(0)p and K-s(0)(p) over bar invariant ss mass distributions presented here do not show any significant peak in the mass range from threshold up to 1.7 GeV. Mass dependent upper limits on sigma(ep -> e Theta X+) x BR(Theta(+) -> K(0)p) are obtained at the 95% confidence level.
- Published
- 2006
17. Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at low Q2 and x * using the H1 vertex detector at HERA
- Author
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Daniel Pitzl, J. Zacek, G. Leibenguth, Pavel Murin, M. Ibbotson, B. Stella, Roland Horisberger, A. Valkárová, I. Sheviakov, Stefan Schmitt, F. Cassol-Brunner, A. Makankine, Wolfram Erdmann, G. Buschhorn, D. Ozerov, R. Weber, A. Baghdasaryan, M. Jacquet, D. P. C. Sankey, P. E. Reimer, A. Rostovtsev, M. Goettlich, L. Hajduk, Wolfgang Lange, B. Olivier, Laurent Favart, B. Portheault, A. Vest, O. Behrendt, S. Vinokurova, P. Kostka, T. Anthonis, V. Jemanov, J. Gayler, M. Hildebrandt, S. Hussain, J. Turnau, I. Milcewicz-Mika, I. Tsakov, Sakar Osman, C. Veelken, D. Meer, Matthew Beckingham, T. Laštovička, E. Barrelet, E. Gabathuler, E. Wünsch, Vladimir Palichik, K. H. Hiller, G. Thompson, R. C. W. Henderson, S. Gorbounov, V. Spaskov, Jan Kretzschmar, Anna Kropivnitskaya, V. Chekelian, S. Ghazaryan, J. Kückens, A. Nikiforov, Paul Laycock, E. Malinovski, Z. Rurikova, Emmanuel Sauvan, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, G. Grindhammer, C. Goyon, B. R. Grell, Andrej Liptaj, R. Felst, D. Utkin, J. Bähr, Theodora Papadopoulou, D. Wegener, N. Werner, Y. de Boer, H. Henschel, E. Rizvi, G. D. Patel, K. Wacker, H. Meyer, Georgios Tsipolitis, M. Fleischer, B. List, A. Aktas, D.P. Johnson, P. Van Mechelen, J.C. Bizot, C. Niebuhr, Fabian Zomer, A. Specka, C. Wissing, D. Mladenov, Matthias Ulrich Mozer, R. Marshall, N. Malden, C. Pascaud, L. Finke, Dirk L. Hoffmann, S. Egli, Dusan Bruncko, G. Franke, B. Naroska, I. Foresti, M.-O. Boenig, G. Cozzika, Thorsten Lux, L. Janauschek, S. Ginzburgskaya, Grzegorz Nowak, Stefan Valkar, A. Petrukhin, E. Lobodzinska, C. Kiesling, F. Salvaire, P. D. Thompson, Bogdan Povh, F. Sefkow, M. Urban, D. Haidt, V. Yeganov, T. Greenshaw, Y.C. Zhu, K. Daum, John A Coughlan, Y. Soloviev, W.D. Dau, J. B. Dainton, K. Krastev, T. Hreus, L. Lytkin, A. De Roeck, E. Tzamariudaki, A. J. Campbell, A. Dubak, Y. Vazdik, D. Lüke, M. Peez, Stefania Xella, Leif J. Jönsson, Benoit Roland, J. Cvach, T. Klimkovich, Cristinel Diaconu, Stephen Maxfield, J. Stiewe, J. Bracinik, N. Gogitidze, F. P. Schilling, Christoph Grab, L. Schoeffel, Nicolas Berger, J. Zimmermann, S. Levonian, A. Zhelezov, S. Baudrand, J. Ferencei, M. Martisikova, S. Sch¨atzel, V. Efremenko, S. Mikocki, S. Schmidt, T. Kluge, Guenter Eckerlin, André Schöning, L. Goerlich, Michael R. Wessels, V. Brisson, L. Lindfeld, Zhen Zhang, Ricardo Lopez-Fernandez, S. Baumgartner, Andreas Meyer, A. Usik, T. Frisson, I. Strauch, Philipp Fleischmann, E. Perez, Peter Robmann, A. D.R. Vargas Trevino, B. Vujicic, Jean-Arcady Meyer, P. Baranov, G. Laštovička-Medin, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, A. Rimmer, A. Knutsson, Gero Flucke, M. Kapichine, M. Nozicka, F. Tomasz, G. Knies, B. Delcourt, Magnus Hansson, G. Heinzelmann, V. Dodonov, S. Mangano, F. Moreau, S. J. Aplin, S. Essenov, Ilias Panagoulias, D. Traynor, R. Plačakyte, Katerina Lipka, M. Ismail, David Milstead, P. A. Smirnov, V. Tchoulakov, Pierre Marage, Klaus Desch, A. Falkewicz, R. Eichler, Adrian Perieanu, S. Caron, J. E. Olsson, W. Bartel, F. W. Büsser, J. Zalesak, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, J. V. Morris, I. Glushkov, Gerhard Brandt, S. Backovic, V. Volchinski, I. R. Kenyon, Natasa Raicevic, H. Lueders, C. Risler, Vincent Boudry, A. W. Jung, Xavier Janssen, A. N. Morozov, M. Ellerbrock, W. Yan, D. Perez-Astudillo, M. Gregori, N. Loktionova, A. Bunyatyan, G. Herrera, Bradley Cox, D.K. Nikitin, O. Henshaw, O. Behnke, R. Wolf, B. Wessling, F. Eisele, A. Hovhannisyan, Ankita Mehta, Anton Babaev, J. G. Contreras, C. Gwilliam, A. M. Fomenko, A. Mohamed, J. Wagner, V. P. Andreev, C. Gerlich, M. P. J. Landon, A. Astvatsatourov, P. Prideaux, R. Oganezov, I. Tsurin, K. Sedlák, C. Wigmore, H-C. Schultz-Coulon, H. U. Martyn, Matthias Klein, K. Müller, V. Cerny, D.P. Brown, Judith Katzy, A. Asmone, Y.H. Fleming, David South, Karel Cerny, K. Krüger, V. Lubimov, K. Nankov, L. N. Shtarkov, A. Glazov, V. Korbel, Alexandre Lebedev, C. Werner, Paul Newman, T. Zimmermann, Claus Kleinwort, G. Weber, U. Straumann, Thomas Naumann, Erika Garutti, A. V. Fedotov, L. Bystritskaya, H. Zohrabyan, R.N. Shaw-West, N. Keller, V. Lendermann, and A.-I. Lucaci-Timoce
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Quark ,Quantum chromodynamics ,Physics ,Particle physics ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,HERA ,Deep inelastic scattering ,01 natural sciences ,Nuclear physics ,0103 physical sciences ,Vertex (curve) ,High Energy Physics::Experiment ,Charm (quantum number) ,Impact parameter ,Nuclear Experiment ,010306 general physics ,Engineering (miscellaneous) ,Bar (unit) - Abstract
Measurements are presented of inclusive charm and beauty cross sections in e^+p collisions at HERA for values of photon virtuality 12 \le Q^2 \le 60 GeV^2 and of the Bjorken scaling variable 0.0002 \le x \le 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. Values for the structure functions F_2^{c\bar{c}} and F_2^{b\bar{b}} are obtained. This is the first measurement of F_2^{b\bar{b}} in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and withprevious measurements of F_2^{c\bar{c}}.
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- 2006
18. Search for light gravitinos in events with photons and missing transverse momentum at HERA
- Author
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V. Yeganov, D. Kant, P. E. Reimer, F. Moreau, G. G. Winter, Laurent Schoeffel, Dusan Bruncko, J. Wagner, Katerina Lipka, B. Naroska, J. Kroseberg, V. Lubimov, Pierre Marage, Murrough Landon, J. Böhme, T. Kluge, V. Tchoulakov, S. Gorbounov, I. R. Kenyon, Karel Cerny, H. U. Martyn, F. Zomer, A. Uraev, V. Andreev, H. Spitzer, Yves Sirois, T. Greenshaw, Erika Garutti, G. Franke, K. Nankov, L. N. Shtarkov, J. Ferencei, M. Martisikova, J. Naumann, I. Foresti, G. Cozzika, Georgios Tsipolitis, M. Fleischer, P. Van Mechelen, R. Weber, J. Marks, Claus Kleinwort, R. D. Heuer, Klaus Desch, Stefan Valkar, B. Olivier, Roland Horisberger, A. Valkárová, H.-B. Bröker, Hannes Jung, D.P. Brown, J. Haller, O. Henshaw, V. Jemanov, Paul Laycock, E. Malinovski, T. Laštovička, A. D.R. Vargas Trevino, A. Dubak, A. Rimmer, C. Wissing, Alexander Zhokin, S. Baumgartner, C. Niebuhr, J. Becker, Adrian Perieanu, C. Vallée, A. Lebedev, O. Behnke, Emmanuel Sauvan, A. Knutsson, S. Levonian, E. Barrelet, Z. Rurikova, Bogdan Povh, F. Sefkow, G. Grindhammer, J. Dingfelder, I. Sheviakov, S. Schmitt, Y. Vazdik, Daniel Pitzl, S. Egli, Y. R. Coppens, P. Baranov, D. Traynor, K. Daum, A. Asmone, K. H. Hiller, R. C. W. Henderson, N. Werner, F. Cassol-Brunner, E. A. De Wolf, Ch. Berger, C. Risler, R. Roosen, E. Perez, D. Haidt, David South, F. Tomasz, G. Knies, L. Hajduk, A. Aktas, Anton Babaev, J. G. Contreras, M. Urban, M. Jacquet, A. Mohamed, G. Weber, U. Straumann, I. Herynek, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Nikiforov, V. Korbel, P.D. Thompson, M. Schneider, Stefania Xella, G. Thompson, Y. Soloviev, Leif J. Jönsson, Benoit Roland, T. Klimkovich, M. Peez, V. Volchinski, J. Zálešák, V. Spaskov, J. Kückens, K. Wacker, Peter Schleper, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, Martin Karlsson, C. Pascaud, P. Truöl, Paul Richard Newman, Guenter Eckerlin, A. Specka, H. Meyer, R. Demirchyan, C. Gwilliam, R. Pöschl, L. Bystritskaya, Eram Rizvi, H. Henschel, F. P. Schilling, Grzegorz Nowak, I. Milcewicz-Mika, Rainer Stamen, R. Koutouev, A. Petrukhin, Xavier Janssen, R. Marshall, J.C. Bizot, Th. Naumann, H. Zohrabyan, G. Heinzelmann, R. Plačakytė, W. Yan, K. Meier, Gero Flucke, M. Kapichine, M. Nozicka, K. Rybicki, A. Vest, O. Behrendt, V. Dodonov, N. Loktionova, V. Chekelian, S. Vinokurova, Pavel Murin, H. Grässler, J. Cvach, I. Strauch, M. Ibbotson, V. Nagovizin, J-P. Meyer, Judith Katzy, A. Makankine, N. Keller, G. Buschhorn, A. Hovhannisyan, J. Scheins, R. Lemrani, B. Delcourt, E. Gabathuler, Philipp Fleischmann, Laurent Favart, Christoph Grab, C. Werner, Y.H. Fleming, V. Lendermann, V. Schröder, L. Lytkin, T. Anthonis, D. Ozerov, I. Tsurin, B. Portheault, P. Kostka, Peter Robmann, Cristinel Diaconu, V. Brisson, J. Garvey, E. E. Elsen, J. Turnau, W.D. Dau, J. B. Dainton, S. Schätzel, A. Schöning, D. Lüke, C. Duprel, P. Höting, E. Wünsch, A. M. Fomenko, B. Leißner, A. Rostovtsev, Dave Sankey, M. Beckingham, Matthias Ulrich Mozer, A. Fedotov, D. Utkin, B. Reisert, G. D. Patel, C. Gerlich, Günter Flügge, M.-O. Boenig, J. Bähr, Wolfram Erdmann, B. List, S. Backovic, Max Klein, S. Ginzburgskaya, C. Kiesling, D.P. Johnson, A. De Roeck, E. Tzamariudaki, A. J. Campbell, H. Lueders, Stephen Maxfield, N. Malden, S. Mangano, M. Ismail, David Milstead, P. A. Smirnov, Wolfgang Lange, J. Stiewe, J. V. Morris, C. Veelken, S. Schmidt, A. Bunyatyan, J. Gayler, Andrew Mehta, J. Bracinik, N. Gogitidze, Nicolas Berger, Ewelina Lobodzinska, M. Wessels, S. Ghazaryan, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, B. Wessling, Anna Kropivnitskaya, Alexander Paramonov, R. Felst, A. Zhelezov, K. Müller, Christian Schwanenberger, John A Coughlan, S. Caron, Magnus Hansson, D.K. Nikitin, L. Goerlich, B. Stella, K. Gabathuler, D. Wegener, V. Efremenko, B. Koblitz, S. Mikocki, J. Formánek, R. Gerhards, K. Krüger, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, E.-E. Woehrling, F. Eisele, R. Oganezov, K. Sedlák, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, Zhen Zhang, Ricardo Lopez-Fernandez, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, L. Lindfeld, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Yukawa potential ,FOS: Physical sciences ,HERA ,01 natural sciences ,Lightest Supersymmetric Particle ,Supersymmetry breaking ,High Energy Physics - Experiment ,Standard Model ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Selectron tube ,0103 physical sciences ,Neutralino ,Physique des particules élémentaires ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,Gravitino ,010306 general physics - Abstract
A search for gravitinos produced in e±p collisions is performed using the H1 detector at HERA. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb -1 for e+p collisions and 13.5 pb-1 for e -p collisions. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings λ′ equal to 1, in some parts of the parameter space of the considered model. © 2005 Elsevier B.V. All rights reserved., 0, DESY-04-227 / hep-ex/0501030, SCOPUS: ar.j, H1 Collaboration., info:eu-repo/semantics/published
- Published
- 2005
19. Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at high Q 2 using the H1 vertex detector at HERA
- Author
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G. G. Winter, G. Thompson, A. Nikiforov, Denis Johnson, K. H. Hiller, R. C. W. Henderson, S. Levonian, Jochen Dingfelder, Y.R. Coppens, T. Frisson, I. Strauch, Philipp Fleischmann, A. Baghdasaryan, A. Rostovtsev, Leif J. Jönsson, Carl Gwilliam, Yves Sirois, O. Behrendt, S. Vinokurova, R. Lemrani, P. Kostka, A. Specka, T. Klimkovich, Dirk L. Hoffmann, David South, J-P. Meyer, G. Franke, B. Vujicic, R. Oganezov, D. Utkin, J. Bähr, A. Makankine, G. Buschhorn, Matthias Ulrich Mozer, J. Turnau, Michael Schneider, A. Fedotov, Günter Flügge, J. Zalesak, R. Roosen, Wolfgang Lange, C. Niebuhr, Grzegorz Nowak, D. Ozerov, R. Weber, S. Ginzburgskaya, J. Gayler, R. Koutouev, A. Petrukhin, V. Andreev, M. Hildebrandt, Johannes Haller, Y. Soloviev, L. Lindfeld, J. E. Olsson, W. Bartel, A. D.R. Vargas Trevino, H. U. Martyn, Matthias Klein, C. Kiesling, E. E. Elsen, Ahmed Tarek Abouelfadl Mohamed, V. Lubimov, A. De Roeck, E. Tzamariudaki, A. J. Campbell, C. Wigmore, F. P. Schilling, M.-O. Boenig, John A Coughlan, B. Portheault, F. W. Büsser, K. Sedlak, Magnus Hansson, V. Jemanov, Peter Robmann, S. Mangano, Christoph Grab, E. Malinovski, Emmanuel Sauvan, K. Nankov, Roland Horisberger, V. Lendermann, A. Valkárová, V. Schröder, G. Grindhammer, Nicolas Berger, L. N. Shtarkov, I. R. Kenyon, T. Berndt, E. Perez, N. Werner, Michael R. Wessels, Natasa Raicevic, L. Goerlich, P. D. Thompson, V. Brisson, B. Leissner, S. Backovic, Vincent Boudry, D. P. C. Sankey, J. Zimmermann, R. Gerhards, A. Zhelezov, S. Baudrand, B. Stella, Adrian Perieanu, N. Keller, Martin Karlsson, Paul Newman, Zuzana Rurikova, Stefan Schmitt, A. N. Morozov, V. Yeganov, Paul Laycock, H. Lueders, D. Perez-Astudillo, M. Gregori, A. Dubak, R. Eichler, Georgios Tsipolitis, M. Fleischer, Ewelina Lobodzinska, Gerhard Brandt, Matthew Beckingham, M. Goettlich, T. Laštovička, F. Moreau, S. J. Aplin, V. Volchinski, H. Meyer, Y. Vazdik, R. Demirchyan, D. Lüke, Anna Kropivnitskaya, A. Aktas, E. Barrelet, B. Olivier, V. Chekelian, R. Felst, Xavier Janssen, J. Formánek, L. Bystritskaya, M. Peez, Stefania Xella, David Milstead, Zhen Zhang, D. Meer, E. A. De Wolf, Ch. Berger, Karlheinz Meier, H. Zohrabyan, D.P. Brown, S. Essenov, Ricardo Lopez-Fernandez, S. Baumgartner, Bogdan Povh, F. Sefkow, P. Höting, M. Jacquet, Th. Naumann, K. Gabathuler, D. Wegener, A. Usik, G. Frising, A. Rimmer, I. Herynek, D. Kant, Benno List, Katerina Lipka, E. Gabathuler, A. Knutsson, J. Garvey, Katja Krüger, Amanda R. Vest, Laurent Schoeffel, Judith Katzy, V. Tchoulakov, A. M. Fomenko, V. Efremenko, Y.H. Fleming, S. Mikocki, Sebastian M. Schmidt, C. Gerlich, C. Goyon, H-C. Schultz-Coulon, R. Pöschl, M. Urban, R. Marshall, T. Kluge, Pavel Murin, H. Grässler, Guenter Eckerlin, André Schöning, I. Milcewicz-Mika, M. Ibbotson, C. Duprel, Laurent Favart, W. Yan, J. Cvach, Ringaile Placakyte, N. Loktionova, A. Hovhannisyan, D. Traynor, C. Risler, G. Weber, U. Straumann, Anton Babaev, J. G. Contreras, I. Tsurin, P. Prideaux, P. Baranov, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, M. Ismail, P. Truöl, P. A. Smirnov, J. Wagner, B. Wessling, Juraj Bracinik, D.K. Nikitin, O. Henshaw, C. Wissing, J. Böhme, Murrough Landon, Karel Cerny, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Uraev, S. Gorbounov, J. Zacek, A. Glazov, J. Scheins, K. Müller, Christian Schwanenberger, V. Korbel, Stephen Maxfield, J. Stiewe, Wolfram Erdmann, Andrew Mehta, P. Van Mechelen, N. Gogitidze, W.D. Dau, J. B. Dainton, R. D. Heuer, L. Finke, M. Ellerbrock, G. Herrera, Alexandre Lebedev, Bradley Cox, C. Werner, K. Daum, F. Tomasz, C. Pascaud, G. Knies, S. Egli, S. Ghazaryan, F. Salvaire, D. Haidt, Eram Rizvi, G. Heinzelmann, V. Dodonov, Sascha Caron, E. Wünsch, G. D. Patel, K. Wacker, N. Malden, J. V. Morris, A. Bunyatyan, Dusan Bruncko, B. Naroska, Klaus Kurt Desch, H. Henschel, J.C. Bizot, T. Greenshaw, Erika Garutti, Fabian Zomer, I. Foresti, G. Cozzika, Stefan Valkar, C. Schmitz, H.-B. Bröker, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, J. Ferencei, M. Martisikova, J. Naumann, Gero Flucke, M. Kapichine, M. Nozicka, J. Marks, B. Delcourt, Roger Wolf, T. Anthonis, Claus Kleinwort, S. Schätzel, I. Sheviakov, V. Spaskov, J. Kückens, A. B. Meyer, B. Roland, V. Nagovizin, E. E. Woehrling, Pierre Marage, I. Glushkov, Christian Veelken, O. Behnke, F. Eisele, Daniel Pitzl, A. Asmone, F. Cassol-Brunner, L. Hajduk, L. Lytkin, Cristinel Diaconu, and P. E. Reimer
- Subjects
Quantum chromodynamics ,Physics ,Particle physics ,Photon ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Structure function ,HERA ,01 natural sciences ,Transverse plane ,0103 physical sciences ,High Energy Physics::Experiment ,Vertex detector ,Impact parameter ,Nuclear Experiment ,010306 general physics ,Engineering (miscellaneous) - Abstract
Measurements are presented of inclusive charm and beauty cross sections in e$^+$p collisions at HERA for values of photon virtuality Q$^2$ > 150 GeV$^2$ and of inelasticity 0.1 < y < 0.7. The charm and beauty fractions are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. The data are divided into four regions in Q$^2$ and Bjorken x, and values for the structure functions $F_2^{c\overline{c}}$ and $F_2^{b\overline{b}}$ are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics.
- Published
- 2005
20. Search for bosonic stop decays in R-parity violating supersymmetry in e+p collisions at HERA
- Author
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J. Wagner, J. Böhme, Karel Cerny, A. Uraev, M. Beckingham, Stephen Maxfield, J. Stiewe, Matthias Ulrich Mozer, Wolfgang Lange, Pierre Marage, A. Fedotov, Günter Flügge, V. Lubimov, S. Ginzburgskaya, J. Gayler, A. Lebedev, R. Plačakytė, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, C. Veelken, Andrew Mehta, J. Bracinik, K. Nankov, L. N. Shtarkov, V. Korbel, N. Gogitidze, D. Haidt, T. Laštovička, Laurent Schoeffel, R. Weber, G. Ossoskov, P. E. Reimer, E. Barrelet, N. Keller, Paul Laycock, E. Malinovski, A. Vest, G. Weber, U. Straumann, C. Werner, Z. Rurikova, Murrough Landon, O. Behnke, Emmanuel Sauvan, O. Behrendt, G. Grindhammer, E. A. De Wolf, Ch. Berger, Peter Robmann, T. J. Sloan, S. Vinokurova, V. Lendermann, J. Dingfelder, S. Gorbounov, R. Lemrani, P. Kostka, Eram Rizvi, B. Portheault, K. H. Hiller, R. C. W. Henderson, G. G. Winter, N. Werner, V. Schröder, M.-O. Boenig, T. Kuhr, Dusan Bruncko, J. Turnau, G. Heinzelmann, B. Naroska, I. Herynek, S. Levonian, R. Roosen, E. E. Elsen, V. Dodonov, P. Van Mechelen, T. Kluge, O. Henshaw, Paul Richard Newman, Grzegorz Nowak, A. Dubak, T. Greenshaw, Erika Garutti, A. Rostovtsev, V. Jemanov, S. Backovic, R. D. Heuer, R. Koutouev, A. Petrukhin, H. Lueders, S. Mangano, Y. Vazdik, M. Wessels, L. Lytkin, P.D. Thompson, M. Ellerbrock, M. Schneider, Cristinel Diaconu, Stefania Xella, J. Ferencei, G. Herrera, I. Morozov, M. Martisikova, J. Naumann, David South, Bradley Cox, J. Marks, I. R. Kenyon, R. Wolf, Alexander Paramonov, L. Bystritskaya, Y. R. Coppens, C. Pascaud, B. Stella, H. Spitzer, K. Daum, F. Tomasz, K. Krüger, Claus Kleinwort, Nicolas Berger, Th. Naumann, Gero Flucke, J. Kennedy, V. Brisson, G. Knies, M. Kapichine, M. Nozicka, H. Zohrabyan, B. Wessling, C. Risler, Guenter Eckerlin, I. Sheviakov, S. Schmitt, A. Nikiforov, E. Gabathuler, D. Lüke, Roland Horisberger, A. Valkárová, Daniel Pitzl, D. Traynor, A. Asmone, A. Schöning, M. Jacquet, E. Wünsch, Rainer Stamen, A. Specka, J. Zálešák, B. Delcourt, V. Spaskov, S. Baumgartner, I. Strauch, Philipp Fleischmann, Dave Sankey, D. Utkin, F. Cassol-Brunner, L. Hajduk, J. Kückens, K. Wacker, Martin Erdmann, M. Urban, J. Kroseberg, Anton Babaev, C. Gwilliam, S. Schätzel, S. Caron, A. Zhelezov, B. Roland, K. Müller, R. Pöschl, I. Milcewicz-Mika, Leif J. Jönsson, Christian Schwanenberger, B. Reisert, J. Bähr, P. Baranov, G. D. Patel, Adrian Perieanu, J. G. Contreras, A. Aktas, Martin Karlsson, R. Marshall, C. Niebuhr, Peter Schleper, T. Klimkovich, V. Chekelian, M. Peez, A. Mohamed, V. Nagovizin, H. U. Martyn, Georgios Tsipolitis, K. Meier, M. Fleischer, B. Olivier, N. Malden, J. Cvach, G. Thompson, S. Egli, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, Y. Soloviev, Max Klein, A. Makankine, G. Buschhorn, P. Höting, D. Ozerov, D.P. Brown, J. Haller, Pavel Murin, H. Grässler, W. Yan, J. V. Morris, D. Kant, Judith Katzy, Y.H. Fleming, H. Henschel, A. Bunyatyan, M. Ibbotson, N. Loktionova, V. Yeganov, Bogdan Povh, F. Sefkow, J.C. Bizot, A. Hovhannisyan, D.K. Nikitin, V. Volchinski, F. P. Schilling, Katerina Lipka, C. Duprel, I. Tsurin, I. Foresti, G. Cozzika, M. Ismail, David Milstead, V. Tchoulakov, P. A. Smirnov, C. Wissing, H. Meyer, R. Demirchyan, Stefan Valkar, J. Garvey, K. Rybicki, Laurent Favart, T. Anthonis, F. Moreau, H.-B. Bröker, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, Xavier Janssen, A. M. Fomenko, C. Gerlich, Christoph Grab, A. D.R. Vargas Trevino, J. Scheins, Klaus Desch, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Rimmer, W.D. Dau, J. B. Dainton, A. Knutsson, B. Leißner, E. Perez, R. Gerhards, J. Formánek, Wolfram Erdmann, B. List, K. Gabathuler, D. Wegener, S. Ghazaryan, V. Efremenko, B. Koblitz, S. Mikocki, S. Schmidt, John A Coughlan, F. Zomer, V. Andreev, Magnus Hansson, Yves Sirois, G. Franke, Daniel Johnson, L. Goerlich, F. Eisele, R. Oganezov, K. Sedlák, Ewelina Lobodzinska, Anna Kropivnitskaya, R. Felst, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, E.-E. Woehrling, L. Lindfeld, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, Zhen Zhang, Ricardo Lopez-Fernandez, J-P. Meyer, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, and G. Frising
- Subjects
Quark ,Physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics::Phenomenology ,Hadron ,Scalar (mathematics) ,Yukawa potential ,Supersymmetry ,HERA ,Nuclear physics ,R-parity ,High Energy Physics::Experiment ,Minimal Supersymmetric Standard Model - Abstract
A search for scalar top quarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA using the H1 detector. The data, taken at roots = 319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb(-1). The resonant production of scalar top quarks t in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic stop decay t --> BW. The R-parity violating decay of the sbottom quark b --> dv(e) and leptonic and hadronic W decays are considered. No evidence for stop production is found in the search for bosonic stop decays nor in a search for the direct R-parity violating decay t --> eq. Mass dependent limits on lambda' are obtained in the framework of the minimal supersymmetric Standard Model. Stop quarks with masses up to 275 GeV can be excluded at the 95% confidence level for a Yukawa coupling of electromagnetic strength. (C) 2004 Elsevier B.V. All rights reserved.
- Published
- 2004
21. Measurement of the proton structure function F2 at low Q2 in QED Compton scattering at HERA
- Author
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W. Yan, N. Loktionova, A. D.R. Vargas Trevino, Paul Richard Newman, Grzegorz Nowak, A. Hovhannisyan, R. Koutouev, A. Petrukhin, Laurent Schoeffel, J. Žáček, I. R. Kenyon, R. Plačakytė, I. Foresti, G. Cozzika, I. Sheviakov, S. Schmitt, M. Jacquet, I. Tsurin, H. Spitzer, Pierre Marage, S. Levonian, E. Perez, P. Höting, Hans-Christian Schultz-Coulon, Murrough Landon, Stefan Valkar, S. Schmidt, Z. Ratiani, Ewelina Lobodzinska, C. Wissing, N. Keller, K. Gabathuler, I. Milcewicz-Mika, H.-B. Bröker, Hannes Jung, R. Gerhards, V. Lendermann, V. Schröder, S. Gorbounov, Anna Kropivnitskaya, R. Felst, D. Wegener, V. Korbel, R. Eichler, J. Kennedy, V. Brisson, C. Niebuhr, Alexander Zhokin, J. Becker, Caroline Collard, J. Zálešák, S. Egli, J. V. Morris, V. Spaskov, Adrian Perieanu, C. Vallée, R. Heremans, E.-E. Woehrling, H. U. Martyn, B. Portheault, Matthias Klein, Y. Soloviev, O. Behnke, P. E. Reimer, David South, Magnus Hansson, J. Kückens, K. Wacker, A. Bunyatyan, L. Goerlich, E. E. Elsen, S. Baumgartner, V. Volchinski, Th. Naumann, P. Van Mechelen, Pavel Murin, H. Grässler, Daniel Pitzl, V. Lubimov, V. Efremenko, D. Traynor, B. Koblitz, M. Ibbotson, F. P. Schilling, Thorsten Lux, L. Janauschek, H. Meyer, R. Demirchyan, T. Laštovička, N. Van Remortel, R. D. Heuer, A. Asmone, Xavier Janssen, I. Morozov, J. Garvey, F. Cassol-Brunner, L. Hajduk, C. Werner, J. Scheins, G. G. Winter, D. Lüke, E. Barrelet, Leif J. Jönsson, Benoit Roland, F. Eisele, Z. Rurikova, E. Gabathuler, L. Bystritskaya, S. Mikocki, G. Thompson, E. Wünsch, D.P. Brown, M. Urban, J. Haller, H. Zohrabyan, R. Oganezov, A. M. Fomenko, V. Chekelian, K. Sedlák, Dave Sankey, T. Klimkovich, W.D. Dau, J. B. Dainton, K. Rybicki, A. Schöning, Judith Katzy, E. A. De Wolf, Ch. Berger, John A Coughlan, C. Gerlich, Karlheinz Meier, R. Roosen, M.-O. Boenig, A. Makankine, Laurent Favart, L. N. Shtarkov, Christoph Grab, J. Wagner, V. Nagovizin, K. Daum, G. Buschhorn, B. Leißner, M. Peez, Y.H. Fleming, T. Anthonis, F. Tomasz, B. Stella, G. D. Patel, J. Kroseberg, S. Mangano, D.P. Johnson, D. Ozerov, J. Böhme, H. Henschel, J.C. Bizot, Karel Cerny, C. Duprel, G. Knies, A. Uraev, N. Malden, F. Zomer, M. Beckingham, R. Weber, Nicolas Berger, Matthias Ulrich Mozer, A. Lebedev, Gero Flucke, V. Andreev, C. Risler, A. Fedotov, Günter Flügge, D. Haidt, L. Lytkin, Cristinel Diaconu, Georgios Tsipolitis, M. Fleischer, M. Kapichine, M. Nozicka, I. Herynek, C. Kiesling, Dusan Bruncko, Eram Rizvi, G. Heinzelmann, A. De Roeck, V. Dodonov, Martin Erdmann, E. Tzamariudaki, A. J. Campbell, S. Michine, J. Formánek, C. Gwilliam, A. Rostovtsev, B. Naroska, J-P. Meyer, B. Delcourt, Yves Sirois, J. Cvach, Bogdan Povh, F. Sefkow, G. Ossoskov, Rainer Stamen, T. Kluge, T. Greenshaw, Erika Garutti, M. Ismail, David Milstead, P. A. Smirnov, P. Baranov, G. Franke, Wolfram Erdmann, B. List, Peter Schleper, S. Schätzel, J. Ferencei, M. Martisikova, J. Naumann, C. Pascaud, J. Marks, Guenter Eckerlin, A. Nikiforov, A. Dubak, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Claus Kleinwort, Sergey Rusakov, P. Truöl, D. Utkin, B. Reisert, J. Bähr, S. Ghazaryan, Y. Vazdik, P.D. Thompson, M. Schneider, S. Caron, Stefania Xella, D.K. Nikitin, B. Wessling, R. Pöschl, O. Henshaw, R. Marshall, K. Müller, Christian Schwanenberger, Stephen Maxfield, M. Hildebrandt, J. Stiewe, Andrew Mehta, J. Bracinik, N. Gogitidze, Anton Babaev, J. G. Contreras, A. Mohamed, M. Wessels, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, Klaus Desch, A. Rimmer, A. Knutsson, Zhen Zhang, Ricardo Lopez-Fernandez, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, J. E. Olsson, W. Bartel, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, L. Lindfeld, G. Weber, U. Straumann, V. Jemanov, V. Yeganov, A. Aktas, Y. R. Coppens, F. Moreau, B. Olivier, D. Kant, Katerina Lipka, K. H. Hiller, R. C. W. Henderson, V. Tchoulakov, I. Strauch, Philipp Fleischmann, A. Vest, O. Behrendt, S. Vinokurova, Peter Robmann, R. Lemrani, P. Kostka, J. Turnau, A. Specka, S. Backovic, H. Lueders, Wolfgang Lange, J. Gayler, C. Veelken, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, J. Dingfelder, N. Werner, T. Kuhr, Roland Horisberger, A. Valkárová, and Martin Karlsson
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Range (particle radiation) ,Photon ,Proton ,010308 nuclear & particles physics ,Scattering ,High Energy Physics::Phenomenology ,Detector ,Structure function ,Compton scattering ,HERA ,01 natural sciences ,Nuclear physics ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics - Abstract
The proton structure function F-2(x, Q(2)) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q(2), down to 0.5 GeV2, and Bjorken x up to similar to 0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in agreement with the measurements from fixed target lepton-nucleon scattering experiments. (C) 2004 Published by Elsevier B.V.
- Published
- 2004
22. Forward $\pi^\circ$ production and associated transverse energy flow in deep-inelastic scattering at HERA
- Author
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V. Nagovizin, Leif J. Jönsson, A. Makankine, G. Buschhorn, D. Ozerov, E. E. Woehrling, V. Panassik, Murrough Landon, Grzegorz Nowak, Pierre Marage, R. Koutouev, A. Petrukhin, M. Davidsson, R. Eichler, H. U. Martyn, Christian Veelken, P. Höting, Matthias Klein, S. Gorbounov, J. Rauschenberger, Michael R. Wessels, V. Lubimov, Paul Laycock, V. Brisson, Amanda R. Vest, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, F. Eisele, S. Vassiliev, Jan Hladky, V. Andreev, A. D.R. Vargas Trevino, Dusan Bruncko, P. Van Mechelen, Laurent Schoeffel, Sascha Caron, N. Werner, E. Wünsch, I. Strauch, B. Leiner, Roland Horisberger, A. Valkárová, V. Jemanov, B. Naroska, Martin Karlsson, Dave Sankey, A. Beglarian, P. Dixon, J. Wagner, T. Kuhr, Philipp Fleischmann, Daniel Pitzl, D.P. Brown, E. Perez, Jean-Arcady Meyer, T. Greenshaw, Yves Sirois, J. Böhme, T. Laštovička, J. Formánek, A. Asmone, N. Delerue, M. zur Nedden, F. Cassol-Brunner, J.P. Phillips, L. Hajduk, Juergen Kroseberg, R. Gerhards, Dirk L. Hoffmann, G. Franke, E. Barrelet, G. D. Patel, K. Wacker, O. Behnke, K. Daum, Wolfgang Lange, A. Uraev, E. A. De Wolf, Ch. Berger, L. N. Shtarkov, J. Cvach, Anton Babaev, D. Traynor, J. Gayler, M. Hildebrandt, Georgios Tsipolitis, M. Urban, J. Ferencei, J. G. Contreras, J. Naumann, J.C. Bizot, P. E. Reimer, M. Fleischer, Karlheinz Meier, N. Malden, F. Tomasz, C. Risler, Angela Mehta, G. Knies, J. Marks, K. Gabathuler, Sebastian M. Schmidt, L. Bystritskaya, Claus Kleinwort, Zhen Zhang, G. G. Winter, I. Herynek, Fabian Zomer, Ricardo Lopez-Fernandez, David Schmidt, A. Aktas, P. A. Smirnov, Pavel Murin, Paul Newman, D. Wegener, Matthew Jones, Caroline Collard, B. Wessling, B. Olivier, H. Grässler, P. D. Thompson, L. Goerlich, M. Ibbotson, I. Sheviakov, S. Baumgartner, I. Foresti, G. Cozzika, C. Niebuhr, Bogdan Povh, F. Sefkow, S. Luders, Christian Johnson, Peter Robmann, Stefan Valkar, F. Keil, Denis Johnson, H.-B. Bröker, Hannes Jung, J. V. Morris, Alexander Zhokin, Laurent Favart, J. Zacek, T. Anthonis, A. Usik, M. Jacquet, B. Reisert, Graham Thompson, V. Efremenko, G. Weber, Martin Erdmann, T. Kluge, F. Niebergall, B. Koblitz, Ewelina Lobodzinska, Matthew Beckingham, U. Straumann, G. Frising, A. Bunyatyan, J. Becker, C. Vallée, H. Spitzer, V. Grabski, Benno List, S. Mikocki, Hans-Christian Schultz-Coulon, Beate Heinemann, Peter Truoel, S. Levonian, L. Lytkin, Anna Kropivnitskaya, S. Michine, V. Chekelian, R. Felst, J. Kueckens, D. Kant, I. Milcewicz-Mika, V. Spaskov, Guenter Eckerlin, Gero Flucke, A. Vichnevski, M. Kapichine, M. Nozicka, Cristinel Diaconu, J. Kennedy, V. Korbel, S. Backovic, Juraj Bracinik, André Schöning, Rainer Stamen, Y.R. Coppens, J. E. Olsson, A. Koutov, B. Delcourt, Johannes Haller, F. Moreau, K. Müller, Christian Schwanenberger, H. Lueders, A. B. Meyer, Judith Katzy, W. Erdmann, C. Pascaud, S. Egli, Stephen Maxfield, W. Bartel, J. Stiewe, S. Schätzel, J. Scheins, Alexandre Lebedev, M. Hilgers, C. Werner, Y.H. Fleming, J. Garvey, D. Haidt, A. M. Fomenko, W.D. Dau, J. B. Dainton, David South, J. D. Dowell, C. Gerlich, N. Gogitidze, T. J. Sloan, Eram Rizvi, G. Heinzelmann, V. Lendermann, V. Schröder, Y. Soloviev, V. Dodonov, C. Duprel, F. W. Büsser, W. Braunschweig, M. Ellerbrock, G. Herrera, Bradley Cox, I. R. Kenyon, T. Berndt, S. Ghazaryan, A. Burrage, Natasa Raicevic, F. P. Schilling, Vincent Boudry, S. D. Kolya, A. N. Morozov, R. Pöschl, V. Volchinski, R. Marshall, H. Henschel, K. Rybicki, J. Gassner, H. Meyer, R. Demirchyan, M. Winde, Christoph Grab, Xavier Janssen, B. M. Waugh, D.K. Nikitin, K. H. Hiller, R. C. W. Henderson, O. Henshaw, Jochen Dingfelder, R. Weber, A. Specka, C. Wissing, M.-O. Boenig, S. Mangano, S. Ferron, L. Janauschek, A. Rostovtsev, J. Bähr, A. Fedotov, Günter Flügge, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, K. Sedlak, Th. Naumann, E. Gabathuler, D. Meer, O. Behrendt, R. Lemrani, P. Kostka, J. Turnau, Michael Schneider, A. Dubak, Y. Vazdik, D. Lüke, M. Peez, David Milstead, A. Astvatsatourov, D. Clarke, John A Coughlan, B. Stella, N. Keller, Stefan Schmitt, J. Zalesak, R. Roosen, E. E. Elsen, R. Heremans, J. Martyniak, N. Loktionova, A. Hovhannisyan, I. Tsurin, M. C. Cousinou, J.E. Turney, P. Baranov, Peter Schleper, P.J.W. Faulkner, A.S. Belousov, and Sergey Rusakov
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Physics ,Quantum chromodynamics ,Particle physics ,Physics and Astronomy (miscellaneous) ,Proton ,Meson ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Hadron ,Parton ,HERA ,Deep inelastic scattering ,01 natural sciences ,Nuclear physics ,Transverse plane ,0103 physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment ,010303 astronomy & astrophysics ,Engineering (miscellaneous) - Abstract
Deep-inelastic positron-proton interactions at low values of Bjorken-x down to x \approx 4.10^-5 which give rise to high transverse momentum pi^0 mesons are studied with the H1 experiment at HERA. The inclusive cross section for pi^0 mesons produced at small angles with respect to the proton remnant (the forward region) is presented as a function of the transverse momentum and energy of the pi^0 and of the four-momentum transfer Q^2 and Bjorken-x. Measurements are also presented of the transverse energy flow in events containing a forward pi^0 meson. Hadronic final state calculations based on QCD models implementing different parton evolution schemes are confronted with the data.
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- 2004
23. Muon pair production in ep collisions at HERA
- Author
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Wolfgang Lange, Laurent Schoeffel, J. Gayler, Paul Laycock, E. Malinovski, Emmanuel Sauvan, J. C. Bizot, Murrough Landon, Max Klein, C. Niebuhr, G. Grindhammer, N. Keller, J. Dingfelder, S. Egli, Y. Soloviev, V. Lendermann, V. Schröder, P. D. Thompson, S. Levonian, A. B. Meyer, K. Meier, Dusan Bruncko, S. Mangano, F. Eisele, H. U. Martyn, K. Sedlák, N. Werner, M. Ismail, David Milstead, S. Gorbounov, Y.R. Coppens, B. Naroska, J. B. Dainton, F. Moreau, J. Hladký, V. Korbel, Wolfram Erdmann, T. Kluge, J. E. Olsson, T. Greenshaw, J. G. Contreras, Pierre Marage, T. Kuhr, P. A. Smirnov, F. P. Schilling, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, J. V. Morris, S. D. Kolya, P. Van Mechelen, S. Michine, A. Bunyatyan, F. W. Büsser, J. Žáček, J. Haller, D. Kant, Stephen Maxfield, J. Ferencei, M. Martisikova, C. Veelken, R. D. Heuer, I. Morozov, L. Bystritskaya, M.-O. Boenig, P. Murín, J. Garvey, J. Scheins, C. Johnson, H. Zohrabyan, Hans-Christian Schultz-Coulon, J. Stiewe, A. Vichnevski, I. R. Kenyon, T. Berndt, C. Risler, A. M. Fomenko, J. D. Dowell, D.P. Brown, S. Ghazaryan, Alexandre Lebedev, W.D. Dau, B. Leißner, Natasa Raicevic, Vincent Boudry, K. Rybicki, Christoph Grab, D. Meer, J. Marks, Andrew Mehta, J. Bracinik, Claus Kleinwort, V. Lubimov, I. Sheviakov, S. Schmitt, C. Werner, D. Haidt, F. Tomasz, C. Gerlich, G. Thompson, O. Behnke, Martin Erdmann, S. Lüders, A. N. Morozov, Nicolas Berger, C. Berger, J. Formánek, M. Gregori, N. Gogitidze, W. Bartel, R. Eichler, G. Knies, S. Caron, T. J. Sloan, A. J. Campbell, B. E. Cox, K. H. Hiller, R. C. W. Henderson, Eram Rizvi, R. Pöschl, A. Rostovtsev, I. Strauch, Philipp Fleischmann, Peter Robmann, M. Winde, P. Baranov, M. Hildebrandt, Roland Horisberger, G. Heinzelmann, V. Dodonov, Daniel Pitzl, D. Traynor, M. Jacquet, A. Asmone, H. Grässler, M. Ibbotson, V. Spaskov, J. Kroseberg, Judith Katzy, H. Henschel, A. Valkárová, L. N. Shtarkov, F. Cassol-Brunner, K. Gabathuler, D.K. Nikitin, O. Henshaw, Paul Newman, D. Wegener, V. Grabski, W. Braunschweig, F. Zomer, J. Kückens, Y.H. Fleming, H. Spitzer, Rainer Stamen, L. Hajduk, C. Wissing, Laurent Favart, T. Anthonis, M. Wessels, D. South, E. Wünsch, C. Duprel, M. Urban, Adrian Perieanu, Dave Sankey, N. Delerue, M. Ellerbrock, V. Andreev, A. Specka, Thorsten Lux, L. Janauschek, Martin Karlsson, Gero Flucke, R. Marshall, B. Reisert, J. Bähr, G. Herrera, B. Waugh, G. Weber, M. C. Cousinou, U. Straumann, M. Kapichine, M. Nozicka, G. D. Patel, V. Jemanov, S. Backovic, B. Wessling, Thomas Naumann, V. Efremenko, B. Koblitz, V. Chekelian, D.P. Johnson, V. Nagovizin, N. Malden, Georgios Tsipolitis, H. Lueders, V. Volchinski, A. Vest, O. Behrendt, E. E. Woehrling, S. Vinokurova, M. Fleischer, S. Mikocki, J. Wagner, Yves Sirois, R. Lemrani, H. Meyer, Klaus Desch, J. Böhme, R. Demirchyan, P. Kostka, Karel Cerny, A. Uraev, G. Franke, J. Turnau, L. Lytkin, Cristinel Diaconu, B. List, A. Knutsson, A. Babaev, A. Aktas, S. Schätzel, Bogdan Povh, B. Olivier, Xavier Janssen, F. Sefkow, G. Ossoskov, I. Milcewicz, Leif J. Jönsson, K. Müller, Christian Schwanenberger, Grzegorz Nowak, R. Koutouev, A. Petrukhin, Zhen Zhang, J-P. Meyer, Ricardo Lopez-Fernandez, I. Foresti, S. Baumgartner, G. Cozzika, C. Pascaud, D. Hoffmann, Guenter Eckerlin, André Schöning, A. Usik, Stefan Valkar, G. Frising, J. Cvach, A. Belousov, Peter Schleper, H.-B. Bröker, Hannes Jung, J. Kennedy, Alexander Zhokin, J. Becker, C. Vallée, P.J.W. Faulkner, V. Brisson, R. Heremans, S. Vassiliev, Sergey Rusakov, P. Truöl, W. Yan, C. Collard, T. Laštovička, N. Loktionova, J. Gassner, A. Hovhannisyan, E. Barrelet, Z. Rurikova, I. Tsurin, B. Portheault, E. A. De Wolf, J. Zalesak, E. E. Elsen, J. Martyniak, R. Roosen, J. A. Coughlan, I. Herynek, B. Delcourt, B. Stella, K. Daum, J. Rauschenberger, A. D.R. Vargas Trevino, E. Perez, R. Gerhards, P. E. Reimer, G. G. Winter, J. Naumann, L. Goerlich, P. Höting, S. Schmidt, Ewelina Lobodzinska, Anna Kropivnitskaya, R. Felst, M. Beckingham, Matthias Ulrich Mozer, A. Fedotov, Günter Flügge, C. Kiesling, A. De Roeck, E. Tzamariudaki, E. Gabathuler, K. Wacker, A. Dubak, Y. Vazdik, D. Lüke, M. Schneider, M. Peez, H1 Collaboration, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Damoiseaux, Magali
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Luminosity (scattering theory) ,Muon ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,010308 nuclear & particles physics ,FOS: Physical sciences ,HERA ,Electron ,7. Clean energy ,01 natural sciences ,High Energy Physics - Experiment ,Standard Model ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Pair production ,Full data ,0103 physical sciences ,Transverse momentum ,Physique des particules élémentaires ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics - Abstract
Cross sections for the production of two isolated muons up to high di-muon masses are measured in ep collisions at HERA with the H1 detector in a data sample corresponding to an integrated luminosity of 71 pb-1 at a centre of mass energy of √s=319 GeV. The results are in good agreement with Standard Model predictions, the dominant process being photon-photon interactions. Additional muons or electrons are searched for in events with two high transverse momentum muons using the full data sample corresponding to 114 pb-1, where data at √s=301 GeV and √s=319 GeV are combined. Both the di-lepton sample and the tri-lepton sample agree well with the predictions. © 2004 Published by Elsevier B.V., 0, DESY-03-159 / hep-ex/0311015, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 2004
24. Search for new physics in e±q contact interactions at HERA
- Author
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V. Jemanov, C. Niebuhr, Laurent Schoeffel, Murrough Landon, Paul Richard Newman, Grzegorz Nowak, N. Loktionova, J. Gassner, A. Hovhannisyan, J.G. Contreras, I. Tsurin, M. C. Cousinou, J.E. Turney, P. Baranov, Peter Schleper, S. Egli, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, R. Koutouev, A. Petrukhin, S. Mangano, D. Lüke, C. Wissing, J. Zalesak, Y. Soloviev, E. Wünsch, P. Höting, L. Janauschek, I. Potachnikova, J. Martyniak, S. Lüders, G. Buschhorn, D. Ozerov, V. Lubimov, Dusan Bruncko, B. Naroska, K. H. Hiller, T. Kluge, T. Greenshaw, Rainer Wallny, A. Astvatsatourov, Paul Laycock, E. Malinovski, F. P. Schilling, Doris Eckstein, P. Van Mechelen, R. C. W. Henderson, E. Eisenhandler, R. Pöschl, J. Cvach, G. Grindhammer, G. D. Patel, D.P. Johnson, J. Ferencei, J. Naumann, J. Marks, J. Formánek, J. Dingfelder, N. Werner, D. Clarke, B. Waugh, Claus Kleinwort, S. Baumgartner, N. Malden, Wolfram Erdmann, B. List, M. zur Nedden, Pierre Marage, John A Coughlan, I. Sheviakov, J. Rauschenberger, G. Weber, U. Straumann, D. Kant, David Schmidt, K. Sedlák, O. Karschnick, K. Gabathuler, K. Rybicki, D. Wegener, W.J. Haynes, S. Schmidt, J. V. Morris, C. Risler, K. Daum, S. Mohrdieck, D. P. C. Sankey, A. Specka, Caroline Collard, Christoph Grab, J. Kennedy, V. Brisson, S. Vassiliev, J. Wagner, A. D.R. Vargas Trevino, C. Adloff, F. Keil, H. Meyer, R. Demirchyan, M.N. Mondragon, A. Bunyatyan, Leif J. Jönsson, V. Efremenko, B. Koblitz, Markus Wobisch, Xavier Janssen, J. Böhme, Stephen Maxfield, L. N. Shtarkov, F. Tomasz, V. Spaskov, R. Maraček, R. Marshall, Ewelina Lobodzinska, A. Beglarian, Pavel Murin, H. Grässler, K. Wacker, J. Stiewe, O. Behnke, S. Mikocki, A. Uraev, G. Knies, J-P. Meyer, Martin Erdmann, J. Žáček, M. Ibbotson, A. Knutsson, T. Schörner-Sadenius, T. Laštovička, R. Felst, Matthew Jones, B. Stella, F. Niebergall, Stefan Schmitt, Andrew Mehta, E. Barrelet, P. Dixon, Hans-Christian Schultz-Coulon, Glenn J. White, M. Hildebrandt, A. Vichnevski, A. Lebedev, F. Sefkow, V. Chekelian, V. Korbel, P. Kjellberg, F. Moreau, J. Hladký, J. D. Dowell, B. Lobodzinski, A. Vest, A. Rostovtsev, N. Gogitidze, V. Nagovizin, A. Droutskoi, D. Haidt, E. Perez, S. Caron, V. Panassik, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, S. Hengstmann, Judith Katzy, S. Hurling, Eram Rizvi, G. Heinzelmann, R. Eichler, R. Gerhards, M. Winde, S. D. Kolya, V. Dodonov, L. Lytkin, E.-E. Woehrling, C. Werner, Laurent Favart, T. Anthonis, Cristinel Diaconu, Ç. İşsever, T. Wilksen, P. E. Reimer, C. Johnson, F. Zomer, C. Duprel, I. Herynek, Daniel Pitzl, V. Andreev, L. Bystritskaya, R. Lemrani, P. Kostka, J. Turnau, T. Kuhr, B. Reisert, J. Bähr, S. Levonian, I. R. Kenyon, G. G. Winter, D. Traynor, H. U. Martyn, O. Nix, F. Cassol-Brunner, S. K. Kotelnikov, L. Hajduk, D. South, M. Wessels, M. Urban, H. Spitzer, D.P. Brown, J. Haller, Yves Sirois, M. Ellerbrock, G. Thompson, B. Andrieu, S. Ghazaryan, M. Davidsson, Bradley Cox, G. Franke, Katja Krüger, L. Goerlich, S. Michine, Roland Horisberger, A. Valkárová, H. Henschel, J.C. Bizot, N. Delerue, K. Müller, Christian Schwanenberger, Anton Babaev, I. Foresti, G. Cozzika, F. Eisele, J.P. Phillips, Stefan Valkar, H.-B. Bröker, Martin Karlsson, Hannes Jung, D. Lamb, Alexander Zhokin, J. Becker, C. Vallée, R. Heremans, M. Kapichine, M. Nozicka, A. Koutov, B. Delcourt, S. Schätzel, N. Keller, V. Lendermann, V. Schröder, Eckhard Elsen, Wolfgang Lange, J. Gayler, R. Stamen, Peter Robmann, J. Scheins, W.D. Dau, J. B. Dainton, B. Leißner, A. Loginov, M. Jacquet, Zhen Zhang, T. Hadig, G. Herrera, V. Grabski, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, Y. R. Coppens, Max Klein, I. Strauch, Philipp Fleischmann, Beate Heinemann, David Milstead, C. Pascaud, P. A. Smirnov, Guenter Eckerlin, S. Ferron, S. Wiesand, Th. Naumann, M. Jaffre, J. E. Olsson, W. Bartel, M. Hilgers, J. Garvey, F. W. Büsser, W. Braunschweig, A. M. Fomenko, E. Lebailly, C. Gerlich, T. Berndt, A. Burrage, E. Gabathuler, J. Kroseberg, Vincent Boudry, Y. H. Fleming, A. N. Morozov, Georgios Tsipolitis, M. Fleischer, A. Schöning, Bogdan Povh, A. Dubak, Y. Vazdik, P.D. Thompson, S. Tchetchelnitski, M. Schneider, M. Peez, M. Beckingham, A. Fedotov, Günter Flügge, C. Kiesling, A.C. Wyatt, A. De Roeck, E. Tzamariudaki, A. J. Campbell, and H1 Collaboration
- Subjects
Quark ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Neutral current ,Physics beyond the Standard Model ,High Energy Physics::Phenomenology ,Momentum transfer ,FOS: Physical sciences ,HERA ,Supersymmetry ,High Energy Physics - Experiment ,Standard Model ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Large extra dimension ,High Energy Physics::Experiment - Abstract
Deep-inelastic e^\pm p scattering at high squared momentum transfer Q^2 up to 30000 GeV^2 is used to search for eq contact interactions associated to scales far beyond the HERA centre of mass energy. The neutral current cross section measurements d sigma / d Q^2, corresponding to integrated luminosities of 16.4 pb^-1 of e^- p data and 100.8 pb^-1 of e^+ p data, are well described by the Standard Model and are analysed to set constraints on new phenomena. For conventional contact interactions lower limits are set on compositeness scales Lambda ranging between 1.6 - 5.5 TeV. Couplings and masses of leptoquarks and squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3 - 1.4 TeV. A search for low scale quantum gravity effects in models with large extra dimensions provides limits on the effective Planck scale of M_S > 0.8 TeV. A form factor analysis yields a bound on the radius of light quarks of R_q < 1.0 x 10^-18 m., 15 pages, 5 figures and 5 tables
- Published
- 2003
25. Measurement of B- mixing at the Z
- Author
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D. Decamp, B. Deschizeaux, C. Goy, J.-P. Less, M.-N. Minard, R. Alemany, J.M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll. Garrido, P. Mato, R. Miquel, Ll.M. Mir, S. Orteu, A. Pacheco, J.A. Perlas, E. Tubau, M.G. Catanesi, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, M. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Ruan, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, W.B. Atwood, F. Bird, E. blucher, G. Bonvicini, F. Bossi, D. Brown, T.H. Burnett, H. Drevermann, F. Dydak, R.W. Forty, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Lüke, A. Marchioro, M. Martinez, J. May, S. Menary, A. Minten, A. Miotto, J. Nash, P. Palazzi, F. Ranjard, G. Redlinger, A. Roth, J. Rothberg, H. Rotscheidt, W. von Rüden, R. St. Denis, D. Schlatter, M. Takashima, M. Talby, W. Tejessy, H. Wachsmuth, S. Wassebaech, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, R. El Fellous, P. Gay, J. Harvey, P. Henrard, J. Jousset, B. Michel, J.-C. Montret, D. Pallin, P. Perret, J. Proriol, F. Prulhière, G. Stimpfl, J.D. Hansen, J.R. Hansen, P.H. Hansen, R. Møllerud, E.R. Nielsen, B.S. Nilsson, I. Efthymiopoulos, E. Simopoulou, A. Vayaki, J. Badier, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J.C. Brient, G. Fouque, A. Gamess, R. Guirlet, A. Rosowsky, A. Rougé, M. Rumpf, R. Tanaka, H. Videau, D.J. Candlin, E. Veitch, G. Parrini, M. Corden, C. Georgiopoulos, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, P. Campana, G. Capon, V. Chiarella, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Massimo-Brancaccio, F. Murtas, G.P. Murtas, G. Nicoletti, L. Passalacqua, M. Pepe-Altarelli, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A.W. Halley, I. ten Have, J.L. Hearns, J.G. Lynch, W.T. Morton, C. Raine, J.M. Scarr, K. Smith, A.S. Thompson, R.M. Turnbull, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E.E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A.T. Belk, R. Beuselinck, D.M. Binnie, W. Cameron, M. Cattaneo, P.J. Dornan, S. Dugeay, A.M. Greene, J.F. Hassard, N.M. Lieske, S.J. Patton, D.G. Payne, M.J. Phillips, J.K. Sedgbeer, G. Taylor, I.R. Tomalin, A.G. Wright, P. Girtler, D. Kuhn, G. Rudolph, C.K. Bowdery, T.J. Brodbeck, A.J. Finch, F. Foster, G. Hughes, N.R. Keemer, M. Nuttall, A. Patel, B.S. Rowlingson, T. Sloan, S.W. Snow, E.P. Whelan, T. Barczewski, L.A.T. Bauerdick, K. Kleinknecht, B. Renk, S. Roehn, H.-G. Sander, M. Schmelling, H. Schmidt, F. Steeg, J.-P. Albanese, J.-J. Aubert, C. Benchouk, V. Bernard, A. Bonissent, D. Courvoisier, F. Etienne, S. Papalexiou, P. Payre, B. Pietrzyk, Z. Qian, W. Blum, P. Catteneo, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, T. Hansl-Kozanecka, A. Jahn, W. Kozanecki, E. Lange, G. Lütjens, G. Lutz, W. Männer, H.-G. Moser, Y. Pan, R. Richter, J. Schröder, A.S. Schwarz, R. Settles, U. Stierlin, J. Thomas, G. Wolf, V. Bertin, G. de Bouard, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, G. Ganis, J.-F. Grivaz, Ph. Heusse, P. Janot, V. Journé, D.W. Kim, J. Lefrançois, A.-M. Lutz, J.-J. Veillet, I. Videau, Z. Zhang, F. Zomer, S.R. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, M. Carpinelli, M.A. Ciocci, R. Dell'Orso, I. Ferrante, F. Fidecaro, L. Foà, E. Focardi, F. Forti, A. Giassi, A.M. Giorgi, F. Ligabue, A. Lusiani, E.B. Mannelli, P.S. Marrochesi, A. Messineo, L. Moneta, F. Palla, G. Sanguinetti, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini-Castaldi, A. Venturi, P.G. Verdini, J. Walsh, J.M. Carter, M.G. Green, P.V. March, T. Medcalf, I.S. Quazi, M.R. Saich, J.A. Strong, R.M. Thomas, L.R. West, T. Wildish, D.R. Botterill, R.W. Clifft, T.R. Edgecock, M. Edwards, S.M. Fischer, T.J. Jones, P.R. Norton, D.P. Salmon, J.C. Thompson, B. Bloch-Devaux, P. Colas, C. Klopfenstein, E. Lançon, E. Locci, S. Loucatos, E. Monnier, P. Perez, F. Perrier, J. Rander, J.-F. Renardy, A. Roussarie, J.P. Schuller, J. Schwindling, J.G. Ashman, C.N. Booth, C. Buttar, R. Carney, S. Cartwright, F. Combley, M. Dinsdale, M. Dogru, F. Hatfield, J. Martin, D. Parker, P. Reeves, L.F. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, L. Mirabito, E. Neugebauer, U. Schäfer, H. Seywerd, G. Apollinari, G. Giannini, B. Gobbo, F. Liello, L. Rolandi, U. Stiegler, L. Bellantoni, J.F. Boudreau, D. Cinabro, J.S. Conway, D.F. Cowen, A.J. DeWeerd, Z. Feng, D.P.S. Ferguson, Y.S. Gao, J. Grahl, J.l. Harton, J. Hilgart, J.E. Jacobsen, R.C. Jared, R.P. Johnson, B.W. LeClaire, Y.B. Pan, J.R. Pater, Y. Saadi, V. Sharma, A.M. Walsh, J.A. Wear, F.V. Weber, M.H. Whitney, Sau Lan Wu, Z.I. Zhou, G. Zobernig, D., Decamp, B., Deschizeaux, C., Goy, J. P., Le, M. N., Minard, R., Alemany, J. M., Crespo, M., Delfino, E., Fernandez, V., Gaitan, Garrido, L. l., P., Mato, R., Miquel, Mir, L. l. M., S., Orteu, A., Pacheco, J. A., Perla, E., Tubau, M. G., Catanesi, D., Creanza, M., de Palma, A., Farilla, G., Iaselli, G., Maggi, M., Maggi, S., Natali, S., Nuzzo, M., Quattromini, A., Ranieri, G., Raso, F., Romano, F., Ruggieri, G., Selvaggi, L., Silvestri, P., Tempesta, G., Zito, Y., Gao, H., Hu, D., Huang, X., Huang, J., Lin, J., Lou, C., Qiao, T., Ruan, T., Wang, Y., Xie, D., Xu, R., Xu, J., Zhang, W., Zhao, H., Albrecht, W. B., Atwood, F., Bird, E., Blucher, G., Bonvicini, F., Bossi, D., Brown, T. H., Burnett, H., Drevermann, F., Dydak, R. W., Forty, C., Grab, R., Hagelberg, S., Haywood, B., Jost, M., Kasemann, G., Kellner, J., Knobloch, A., Lacourt, I., Lehrau, T., Lohse, D., Lüke, A., Marchioro, M., Martinez, J., May, S., Menary, A., Minten, A., Miotto, J., Nash, P., Palazzi, F., Ranjard, G., Redlinger, A., Roth, J., Rothberg, H., Rotscheidt, W., von Rüden, Denis, R. S. t., D., Schlatter, M., Takashima, M., Talby, W., Tejessy, H., Wachsmuth, S., Wassebaech, S., Wheeler, W., Wiedenmann, W., Witzeling, J., Wotschack, Z., Ajaltouni, M., Bardadin Otwinowska, A., Falvard, R., El Fellou, P., Gay, J., Harvey, P., Henrard, J., Jousset, B., Michel, J. C., Montret, D., Pallin, P., Perret, J., Proriol, F., Prulhière, G., Stimpfl, J. D., Hansen, J. R., Hansen, P. H., Hansen, R., Møllerud, E. R., Nielsen, B. S., Nilsson, I., Efthymiopoulo, E., Simopoulou, A., Vayaki, J., Badier, A., Blondel, G., Bonneaud, J., Bourotte, F., Braem, J. C., Brient, G., Fouque, A., Game, R., Guirlet, A., Rosowsky, A., Rougé, M., Rumpf, R., Tanaka, H., Videau, D. J., Candlin, E., Veitch, G., Parrini, M., Corden, C., Georgiopoulo, M., Ikeda, J., Lannutti, D., Levinthal, M., Mermikide, L., Sawyer, A., Antonelli, R., Baldini, G., Bencivenni, G., Bologna, P., Campana, G., Capon, V., Chiarella, D'ETTORRE PIAZZOLI, Benedetto, G., Felici, P., Laurelli, G., Mannocchi, F., Massimo Brancaccio, F., Murta, G. P., Murta, G., Nicoletti, L., Passalacqua, M., Pepe Altarelli, P., Picchi, P., Zografou, B., Altoon, O., Boyle, A. W., Halley, I., ten Have, J. L., Hearn, J. G., Lynch, W. T., Morton, C., Raine, J. M., Scarr, K., Smith, A. S., Thompson, R. M., Turnbull, B., Brandl, O., Braun, R., Geige, C., Geweniger, P., Hanke, V., Hepp, E. E., Kluge, Y., Maumary, A., Putzer, B., Rensch, A., Stahl, K., Tittel, M., Wunsch, A. T., Belk, R., Beuselinck, D. M., Binnie, W., Cameron, M., Cattaneo, P. J., Dornan, S., Dugeay, A. M., Greene, J. F., Hassard, N. M., Lieske, S. J., Patton, D. G., Payne, M. J., Phillip, J. K., Sedgbeer, G., Taylor, I. R., Tomalin, A. G., Wright, P., Girtler, D., Kuhn, G., Rudolph, C. K., Bowdery, T. J., Brodbeck, A. J., Finch, F., Foster, G., Hughe, N. R., Keemer, M., Nuttall, A., Patel, B. S., Rowlingson, T., Sloan, S. W., Snow, E. P., Whelan, T., Barczewski, L. A. T., Bauerdick, K., Kleinknecht, B., Renk, S., Roehn, H. G., Sander, M., Schmelling, H., Schmidt, F., Steeg, J. P., Albanese, J. J., Aubert, C., Benchouk, V., Bernard, A., Bonissent, D., Courvoisier, F., Etienne, S., Papalexiou, P., Payre, B., Pietrzyk, Z., Qian, W., Blum, P., Catteneo, G., Cowan, B., Dehning, H., Dietl, M., Fernandez Bosman, T., Hansl Kozanecka, A., Jahn, W., Kozanecki, E., Lange, G., Lütjen, G., Lutz, W., Männer, H. G., Moser, Y., Pan, R., Richter, J., Schröder, A. S., Schwarz, R., Settle, U., Stierlin, J., Thoma, G., Wolf, V., Bertin, G., de Bouard, J., Boucrot, O., Callot, X., Chen, A., Cordier, M., Davier, G., Gani, J. F., Grivaz, Heusse, P. h., P., Janot, V., Journé, D. W., Kim, J., Lefrançoi, A. M., Lutz, J. J., Veillet, I., Videau, Z., Zhang, F., Zomer, S. R., Amendolia, G., Bagliesi, G., Batignani, L., Bosisio, U., Bottigli, C., Bradaschia, M., Carpinelli, M. A., Ciocci, R., Dell'Orso, I., Ferrante, F., Fidecaro, L., Foà, E., Focardi, F., Forti, A., Giassi, A. M., Giorgi, F., Ligabue, A., Lusiani, E. B., Mannelli, P. S., Marrochesi, A., Messineo, L., Moneta, F., Palla, G., Sanguinetti, J., Steinberger, R., Tenchini, G., Tonelli, G., Triggiani, C., Vannini Castaldi, A., Venturi, P. G., Verdini, J., Walsh, J. M., Carter, M. G., Green, P. V., March, T., Medcalf, I. S., Quazi, M. R., Saich, J. A., Strong, R. M., Thoma, L. R., West, T., Wildish, D. R., Botterill, R. W., Clifft, T. R., Edgecock, M., Edward, S. M., Fischer, T. J., Jone, P. R., Norton, D. P., Salmon, J. C., Thompson, B., Bloch Devaux, P., Cola, C., Klopfenstein, E., Lançon, E., Locci, S., Loucato, E., Monnier, P., Perez, F., Perrier, J., Rander, J. F., Renardy, A., Roussarie, J. P., Schuller, J., Schwindling, J. G., Ashman, C. N., Booth, C., Buttar, R., Carney, S., Cartwright, F., Combley, M., Dinsdale, M., Dogru, F., Hatfield, J., Martin, D., Parker, P., Reeve, L. F., Thompson, S., Brandt, H., Burkhardt, C., Grupen, H., Meinhard, L., Mirabito, E., Neugebauer, U., Schäfer, H., Seywerd, G., Apollinari, G., Giannini, B., Gobbo, F., Liello, L., Rolandi, U., Stiegler, L., Bellantoni, J. F., Boudreau, D., Cinabro, J. S., Conway, D. F., Cowen, A. J., Deweerd, Z., Feng, D. P. S., Ferguson, Y. S., Gao, J., Grahl, J. l., Harton, J., Hilgart, J. E., Jacobsen, R. C., Jared, R. P., Johnson, B. W., Leclaire, Y. B., Pan, J. R., Pater, Y., Saadi, V., Sharma, A. M., Walsh, J. A., Wear, F. V., Weber, M. H., Whitney, Sau Lan, Wu, Z. I., Zhou, and G., Zobernig
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Aleph ,Electron–positron annihilation ,High Energy Physics::Phenomenology ,Hadron ,Decision maker ,Measure (mathematics) ,Nuclear physics ,High Energy Physics::Experiment ,Nuclear Experiment ,Mixing (physics) ,Lepton - Abstract
From more than 175 000 hadronic Z decays observed with the ALEPH detector at LEP, we select 823 events with pairs of leptons in the final state. From these we measure χ , the probability thata b hadron which is observed to decay originated as a b hadron. We find χ =0.132 −0.026 +0.027 .
- Published
- 1991
26. Measurement of the B hadron lifetime
- Author
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D. Decamp, B. Deschizeaux, C. Goy, J.-P. Lees, M.-N. Minard, R. Alemany, J.M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll. Garrido, P. Mato, R. Miquel, Ll.M. Mir, S. Orteu, A. Pacheco, J.A. Perlas, E. Tubau, M.G. Catanesi, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, M. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Ruan, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, W.B. Atwood, F. Bird, E. Blucher, G. Bonvicini, F. Bossi, D. Brown, T.H. Burnett, H. Drevermann, F. Dydak, R.W. Forty, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Lüke, A. Marchioro, M. Martinez, J. May, S. Menary, A. Minten, A. Miotto, J. Nash, P. Palazzi, F. Ranjard, G. Redlinger, A. Roth, J. Rothberg, H. Rotscheidt, W. von Rüden, R. St.Denis, D. Schlatter, M. Takashima, M. Talby, W. Tejessy, H. Wachsmuth, S. Wasserbaech, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, R. El Fellous, P. Gay, J. Harvey, P. Henrard, J. Jousset, B. Michel, J.-C. Montret, D. Pallin, P. Perret, J. Proriol, F. Prulhière, G. Stimpfl, J.D. Hansen, J.R. Hansen, P.H. Hansen, R. Møllerud, E.R. Nielsen, B.S. Nilsson, I. Efthymiopoulos, E. Simopoulou, A. Vayaki, J. Badier, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J.C. Brient, G. Fouque, A. Gamess, R. Guirlet, A. Rosowsky, A. Rougé, M. Rumpf, R. Tanaka, H. Videau, D.J. Candlin, E. Veitch, G. Parrini, M. Corden, C. Georgiopoulos, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, P. Campana, G. Capon, V. Chiarella, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Massimo-Brancaccio, F. Murtas, G.P. Murtas, G. Nicoletti, L. Passalacqua, M. Pepe-Altarelli, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A.W. Halley, I.ten Have, J.L. Hearns, J.G. Lynch, W.T. Morton, C. Raine, J.M. Scarr, K. Smith, A.S. Thompson, R.M. Turnbull, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E.E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A.T. Belk, R. Beuselinck, D.M. Binnie, W. Cameron, M. Cattaneo, P.J. Dornan, S. Dugeay, A.M. Greene, J.F. Hassard, N.M. Lieske, S.J. Patton, D.G. Payne, M.J. Phillips, J.K. Sedgbeer, G. Taylor, I.R. Tomalin, A.G. Wright, P. Girtler, D. Kuhn, G. Rudolph, C.K. Bowdery, T.J. Brodbeck, A.J. Finch, F. Foster, G. Hughes, N.R. Keemer, M. Nuttall, A. Patel, B.S. Rowlingson, T. Sloan, S.W. Snow, E.P. Whelan, T. Barczewski, L.A.T. Bauerdick, K. Kleinknecht, B. Renk, S. Roehn, H.-G. Sander, M. Schmelling, H. Schmidt, F. Steeg, J.-P. Albanese, J.-J. Aubert, C. Benchouk, V. Bernard, A. Bonissent, D. Courvoisier, F. Etienne, S. Papalexiou, P. Payre, B. Pietrzyk, Z. Qian, W. Blum, P. Cattaneo, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, T. Hansl-Kozanecka, A. Jahn, W. Kozanecki, E. Lange, G. Lütjens, G. Lutz, W. Männer, H.-G. Moser, Y. Pan, R. Richter, J. Schröder, A.S. Schwarz, R. Settles, U. Stierlin, J. Thomas, G. Wolf, V. Bertin, G. de Bouard, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, G. Ganis, J.-F. Grivaz, Ph. Heusse, P. Janot, V. Journé, D.W. Kim, J. Lefrançois, J.-M. Lutz, J.-J. Veillet, I. Videau, Z. Zhang, F. Zomer, S.R. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, M. Carpinelli, M.A. Ciocci, R. Dell'Orso, I. Ferrante, F. Fidecaro, L. Foà, E. Focardi, F. Forti, A. Giassi, M.A. Giorgi, F. Ligabue, A. Lusiani, E.B. Mannelli, P.S. Marrocchesi, A. Messineo, L. Moneta, F. Palla, G. Sanguinetti, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini-Castaldi, A. Venturi, P.G. Verdini, J. Walsh, J.M. Carter, M.G. Green, P.V. March, T. Medcalf, I.S. Quazi, M.R. Saich, J.A. Strong, R.M. Thomas, L.R. West, T. Wildish, D.R. Botterill, R.W. Clifft, T.R. Edgecock, M. Edwards, S.M. Fisher, T.J. Jones, P.R. Norton, D.P. Salmon, J.C. Thompson, B. Bloch-Devaux, P. Colas, C. Klopfenstein, E. Lançon, E. Locci, S. Loucatos, E. Monnier, P. Perez, F. Perrier, J. Rander, J.-F. Renardy, A. Roussarie, J.-P. Schuller, J. Schwindling, J.G. Ashan, C.N. Booth, C. Buttar, R. Carney, S. Cartwright, F. Combley, M. Dinsdale, M. Dogru, F. Hatfield, J. Martin, D. Parker, P. Reeves, L.F. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, L. Mirabito, E. Neugebauer, U. Schäfer, H. Seywerd, G. Apollinari, G. Giannini, B. Gobbo, F. Liello, L. Rolandi, U. Stiegler, L. Bellantoni, J.F. Boudreau, D. Cinabro, J.S. Conway, D.F. Cowen, A.J. DeWeerd, Z. Feng, D.P.S. Ferguson, Y.S. Gao, J. Grahl, J.L. Harton, J. Hilgart, J.E. Jacobsen, R.C. Jared, R.P. Johnson, B.W. LeClaire, Y.B. Pan, J.R. Pater, Y. Saadi, V. Sharma, M.A. Walsh, J.A. Wear, F.V. Weber, M.H. Whitney, Sau Lan Wu Lan Wu, Z.L. Zhou, G. Zobernig, D., Decamp, B., Deschizeaux, C., Goy, J. P., Lee, M. N., Minard, R., Alemany, J. M., Crespo, M., Delfino, E., Fernandez, V., Gaitan, Garrido, L. l., P., Mato, R., Miquel, Mir, L. l. M., S., Orteu, A., Pacheco, J. A., Perla, E., Tubau, M. G., Catanesi, D., Creanza, M., de Palma, A., Farilla, G., Iaselli, G., Maggi, M., Maggi, S., Natali, S., Nuzzo, M., Quattromini, A., Ranieri, G., Raso, F., Romano, F., Ruggieri, G., Selvaggi, L., Silvestri, P., Tempesta, G., Zito, Y., Gao, H., Hu, D., Huang, X., Huang, J., Lin, J., Lou, C., Qiao, T., Ruan, T., Wang, Y., Xie, D., Xu, R., Xu, J., Zhang, W., Zhao, H., Albrecht, W. B., Atwood, F., Bird, E., Blucher, G., Bonvicini, F., Bossi, D., Brown, T. H., Burnett, H., Drevermann, F., Dydak, R. W., Forty, C., Grab, R., Hagelberg, S., Haywood, B., Jost, M., Kasemann, G., Kellner, J., Knobloch, A., Lacourt, I., Lehrau, T., Lohse, D., Lüke, A., Marchioro, M., Martinez, J., May, S., Menary, A., Minten, A., Miotto, J., Nash, P., Palazzi, F., Ranjard, G., Redlinger, A., Roth, J., Rothberg, H., Rotscheidt, W., von Rüden, Denis, R. S. t., D., Schlatter, M., Takashima, M., Talby, W., Tejessy, H., Wachsmuth, S., Wasserbaech, S., Wheeler, W., Wiedenmann, W., Witzeling, J., Wotschack, Z., Ajaltouni, M., Bardadin Otwinowska, A., Falvard, R., El Fellou, P., Gay, J., Harvey, P., Henrard, J., Jousset, B., Michel, J. C., Montret, D., Pallin, P., Perret, J., Proriol, F., Prulhière, G., Stimpfl, J. D., Hansen, J. R., Hansen, P. H., Hansen, R., Møllerud, E. R., Nielsen, B. S., Nilsson, I., Efthymiopoulo, E., Simopoulou, A., Vayaki, J., Badier, A., Blondel, G., Bonneaud, J., Bourotte, F., Braem, J. C., Brient, G., Fouque, A., Game, R., Guirlet, A., Rosowsky, A., Rougé, M., Rumpf, R., Tanaka, H., Videau, D. J., Candlin, E., Veitch, G., Parrini, M., Corden, C., Georgiopoulo, M., Ikeda, J., Lannutti, D., Levinthal, M., Mermikide, L., Sawyer, A., Antonelli, R., Baldini, G., Bencivenni, G., Bologna, P., Campana, G., Capon, V., Chiarella, D'ETTORRE PIAZZOLI, Benedetto, G., Felici, P., Laurelli, G., Mannocchi, F., Massimo Brancaccio, F., Murta, G. P., Murta, G., Nicoletti, L., Passalacqua, M., Pepe Altarelli, P., Picchi, P., Zografou, B., Altoon, O., Boyle, A. W., Halley, I., ten Have, J. L., Hearn, J. G., Lynch, W. T., Morton, C., Raine, J. M., Scarr, K., Smith, A. S., Thompson, R. M., Turnbull, B., Brandl, O., Braun, R., Geige, C., Geweniger, P., Hanke, V., Hepp, E. E., Kluge, Y., Maumary, A., Putzer, B., Rensch, A., Stahl, K., Tittel, M., Wunsch, A. T., Belk, R., Beuselinck, D. M., Binnie, W., Cameron, M., Cattaneo, P. J., Dornan, S., Dugeay, A. M., Greene, J. F., Hassard, N. M., Lieske, S. J., Patton, D. G., Payne, M. J., Phillip, J. K., Sedgbeer, G., Taylor, I. R., Tomalin, A. G., Wright, P., Girtler, D., Kuhn, G., Rudolph, C. K., Bowdery, T. J., Brodbeck, A. J., Finch, F., Foster, G., Hughe, N. R., Keemer, M., Nuttall, A., Patel, B. S., Rowlingson, T., Sloan, S. W., Snow, E. P., Whelan, T., Barczewski, L. A. T., Bauerdick, K., Kleinknecht, B., Renk, S., Roehn, H. G., Sander, M., Schmelling, H., Schmidt, F., Steeg, J. P., Albanese, J. J., Aubert, C., Benchouk, V., Bernard, A., Bonissent, D., Courvoisier, F., Etienne, S., Papalexiou, P., Payre, B., Pietrzyk, Z., Qian, W., Blum, P., Cattaneo, G., Cowan, B., Dehning, H., Dietl, M., Fernandez Bosman, T., Hansl Kozanecka, A., Jahn, W., Kozanecki, E., Lange, G., Lütjen, G., Lutz, W., Männer, H. G., Moser, Y., Pan, R., Richter, J., Schröder, A. S., Schwarz, R., Settle, U., Stierlin, J., Thoma, G., Wolf, V., Bertin, G., de Bouard, J., Boucrot, O., Callot, X., Chen, A., Cordier, M., Davier, G., Gani, J. F., Grivaz, Heusse, P. h., P., Janot, V., Journé, D. W., Kim, J., Lefrançoi, J. M., Lutz, J. J., Veillet, I., Videau, Z., Zhang, F., Zomer, S. R., Amendolia, G., Bagliesi, G., Batignani, L., Bosisio, U., Bottigli, C., Bradaschia, M., Carpinelli, M. A., Ciocci, R., Dell'Orso, I., Ferrante, F., Fidecaro, L., Foà, E., Focardi, F., Forti, A., Giassi, M. A., Giorgi, F., Ligabue, A., Lusiani, E. B., Mannelli, P. S., Marrocchesi, A., Messineo, L., Moneta, F., Palla, G., Sanguinetti, J., Steinberger, R., Tenchini, G., Tonelli, G., Triggiani, C., Vannini Castaldi, A., Venturi, P. G., Verdini, J., Walsh, J. M., Carter, M. G., Green, P. V., March, T., Medcalf, I. S., Quazi, M. R., Saich, J. A., Strong, R. M., Thoma, L. R., West, T., Wildish, D. R., Botterill, R. W., Clifft, T. R., Edgecock, M., Edward, S. M., Fisher, T. J., Jone, P. R., Norton, D. P., Salmon, J. C., Thompson, B., Bloch Devaux, P., Cola, C., Klopfenstein, E., Lançon, E., Locci, S., Loucato, E., Monnier, P., Perez, F., Perrier, J., Rander, J. F., Renardy, A., Roussarie, J. P., Schuller, J., Schwindling, J. G., Ashan, C. N., Booth, C., Buttar, R., Carney, S., Cartwright, F., Combley, M., Dinsdale, M., Dogru, F., Hatfield, J., Martin, D., Parker, P., Reeve, L. F., Thompson, S., Brandt, H., Burkhardt, C., Grupen, H., Meinhard, L., Mirabito, E., Neugebauer, U., Schäfer, H., Seywerd, G., Apollinari, G., Giannini, B., Gobbo, F., Liello, L., Rolandi, U., Stiegler, L., Bellantoni, J. F., Boudreau, D., Cinabro, J. S., Conway, D. F., Cowen, A. J., Deweerd, Z., Feng, D. P. S., Ferguson, Y. S., Gao, J., Grahl, J. L., Harton, J., Hilgart, J. E., Jacobsen, R. C., Jared, R. P., Johnson, B. W., Leclaire, Y. B., Pan, J. R., Pater, Y., Saadi, V., Sharma, M. A., Walsh, J. A., Wear, F. V., Weber, M. H., Whitney, Sau Lan Wu Lan, Wu, Z. L., Zhou, and G., Zobernig
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,Electron–positron annihilation ,High Energy Physics::Phenomenology ,Hadron ,Elementary particle ,Nuclear physics ,High Energy Physics::Experiment ,B meson ,Impact parameter ,Nuclear Experiment ,ALEPH experiment ,Particle Physics - Experiment ,Lepton - Abstract
The average lifetime of B hadrons has been measured by the ALEPH experiment at LEP. Events containing B hadrons are selected by the identification of leptons with high transverse momentum in hadronic Z decays, and the lifetime is extracted from a fit to the impact parameter distribution of the lepton tracks. From a sample of 1.7×105 hadronic Z decays a lifetime of 1.29±0.06±0.10 ps is measured.
- Published
- 1991
27. Elastic photoproduction of J/ψ and ϒ mesons at HERA
- Author
-
C. Adloff, V. Andreev, B. Andrieu, V. Arkadov, A. Astvatsatourov, I. Ayyaz, A. Babaev, J. Bähr, P. Baranov, E. Barrelet, W. Bartel, U. Bassler, P. Bate, A. Beglarian, O. Behnke, C. Beier, A. Belousov, T. Benisch, Ch. Berger, G. Bernardi, T. Berndt, J.C. Bizot, K. Borras, V. Boudry, W. Braunschweig, V. Brisson, H.-B. Bröker, D.P. Brown, W. Brückner, P. Bruel, D. Bruncko, J. Bürger, F.W. Büsser, A. Bunyatyan, H. Burkhardt, A. Burrage, G. Buschhorn, A.J. Campbell, J. Cao, T. Carli, S. Caron, E. Chabert, D. Clarke, B. Clerbaux, C. Collard, J.G. Contreras, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, J. Cvach, J.B. Dainton, W.D. Dau, K. Daum, M. David, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E.A. De Wolf, C. Diaconu, P. Dixon, V. Dodonov, J.D. Dowell, A. Droutskoi, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P.J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, J.M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Goldberg, C. Goodwin, C. Grab, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, T. Hauschildt, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hilgers, K.H. Hiller, C.D. Hilton, J. Hladký, P. Höting, D. Hoffmann, W. Hoprich, R. Horisberger, S. Hurling, M. Ibbotson, Ç. İşsever, M. Jacquet, M. Jaffre, L. Janauschek, D.M. Jansen, X. Janssen, V. Jemanov, L. Jönsson, D.P. Johnson, M.A.S. Jones, H. Jung, H.K. Kästli, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, O. Kaufmann, M. Kausch, F. Keil, N. Keller, J. Kennedy, I.R. Kenyon, S. Kermiche, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, B. Koblitz, H. Kolanoski, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, M.W. Krasny, H. Krehbiel, J. Kroseberg, D. Krücker, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Kutuev, W. Lachnit, R. Lahmann, D. Lamb, M.P.J. Landon, W. Lange, T. Laštovička, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, N. Magnussen, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H.-U. Martyn, J. Martyniak, S.J. Maxfield, A. Mehta, K. Meier, P. Merkel, F. Metlica, A. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M.N. Mondragon, F. Moreau, A. Morozov, J.V. Morris, D. Müller, K. Müller, P. Murı́n, V. Nagovizin, B. Naroska, J. Naumann, Th. Naumann, I. Négri, G. Nellen, P.R. Newman, T.C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, T. Nunnemann, J.E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G.D. Patel, E. Perez, J.P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, S. Riess, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, C. Royon, S. Rusakov, K. Rybicki, D.P.C. Sankey, J. Scheins, F.-P. Schilling, S. Schleif, P. Schleper, D. Schmidt, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H.-C. Schultz-Coulon, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, P. Sievers, Y. Sirois, T. Sloan, P. Smirnov, V. Solochenko, Y. Soloviev, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, J. Steinhart, B. Stella, A. Stellberger, J. Stiewe, U. Straumann, W. Struczinski, M. Swart, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P.D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, J. Turnau, J.E. Turney, E. Tzamariudaki, S. Udluft, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, Y. Vazdik, S. von Dombrowski, K. Wacker, R. Wallny, T. Walter, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, G. White, S. Wiesand, T. Wilksen, M. Winde, G.-G. Winter, C. Wissing, M. Wobisch, H. Wollatz, E. Wünsch, A.C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, and M. zur Nedden
- Subjects
Physics ,Scattering cross-section ,Nuclear and High Energy Physics ,Range (particle radiation) ,Particle physics ,Meson ,High Energy Physics::Lattice ,High Energy Physics::Phenomenology ,Perturbative QCD ,Sigma ,HERA ,Regge theory ,Pomeron ,High Energy Physics::Experiment ,Nuclear Experiment - Abstract
Cross sections for elastic photoproduction of J/Psi and Upsilon mesons are presented. For J/Psi mesons the dependence on the photon-proton centre-of-mass energy W_gammap is analysed in an extended range with respect to previous measurements of 26
- Published
- 2000
28. Determination of the longitudinal proton structure function FL(x,Q2) at low x
- Author
-
C. Adloff, S. Aid, M. Anderson, V. Andreev, B. Andrieu, C. Arndt, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, M. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, J. Blümlein, K. Borras, F. Botterweck, V. Boudry, A. Braemer, W. Braunschweig, V. Brisson, W. Brückner, P. Bruel, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M.J. Burton, D. Calvet, A.J. Campbell, T. Carli, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, M.-C. Cousinou, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, C.L. Davis, B. Delcourt, A. De Roeck, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, K.T. Donovan, J.D. Dowell, H.B. Dreis, A. Droutskoi, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, E. Elsen, M. Erdmann, W. Erdmann, A.B. Fahr, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, H. Genzel, R. Gerhards, A. Glazov, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, T. Greenshaw, R.K. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, T. Hadig, D. Haidt, L. Hajduk, T. Haller, M. Hampel, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, K. Hewitt, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, M. Ibbotson, Ç. İşsever, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, D.M. Jansen, T. Jansen, L. Jönsson, D.P. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, M. Kausch, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, H. Krehbiel, D. Krücker, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforge, M.P.J. Landon, W. Lange, U. Langenegger, A. Lebedev, F. Lehner, S. Levonian, G. Lindström, M. Lindstroem, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, L. Lytkin, N. Magnussen, E. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, F. Metlica, A. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, I. Négri, P.R. Newman, D. Newton, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, G. Nowak, G.W. Noyes, T. Nunnemann, M. Nyberg-Werther, M. Oakden, H. Oberlack, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, H. Pawletta, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, G. Pope, B. Povh, S. Prell, K. Rabbertz, G. Rädel, P. Reimer, S. Reinshagen, S. Riemersma, H. Rick, F. Riepenhausen, S. Riess, E. Rizvi, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, L. Schoeffel, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, P. Steffen, R. Steinberg, H. Steiner, J. Steinhart, B. Stella, A. Stellberger, J. Stier, J. Stiewe, U. Stößlein, K. Stolze, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, N. Tobien, R. Todenhagen, P. Truöl, G. Tsipolitis, J. Turnau, J. Tutas, E. Tzamariudaki, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, D. Vandenplas, P. Van Esch, P. Van Mechelen, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, M. Wobisch, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, P. Zini, F. Zomer, J. Zsembery, K. Zuber, M. zurNedden, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Physics ,Quantum chromodynamics ,Nuclear and High Energy Physics ,Particle physics ,Proton ,010308 nuclear & particles physics ,Scattering ,FOS: Physical sciences ,Order (ring theory) ,HERA ,01 natural sciences ,High Energy Physics - Experiment ,Momentum ,High Energy Physics - Experiment (hep-ex) ,Cross section (physics) ,Positron ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics - Abstract
A measurement of the inclusive cross section for the deep-inelastic scattering of positrons off protons at HERA is presented at momentum transfers $8.5 \leq Q^2 \leq 35 GeV^2$ and large inelasticity $y = 0.7$, i.e. for the Bjorken-x range $0.00013 \leq x \leq 0.00055$. Using a next-to-leading order QCD fit to the structure function F_2 at lower y values, the contribution of F_2 to the measured cross section at high y is calculated and, by subtraction, the longitudinal structure function F_{L} is determined for the first time with an average value of $F_L=0.52 \pm 0.03 (stat)$^ {+0.25}_{-0.22}$ (syst) at $Q^2=15.4 GeV^2$ and $x=0.000243$., 17 pages, latex, 4 Figures
- Published
- 1997
29. Photoproduction of mesons in electron-proton collisions at HERA
- Author
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S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M.J. Burton, G. Buschhorn, A.J. Campbell, T. Carli, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, M.-C. Cousinou, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, C.L. Davis, B. Delcourt, A. De Roeck, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, A.B. Fahr, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, A. Glazov, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, R.K. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, T. Hadig, D. Haidt, L. Hajduk, M. Hampel, W.J. Haynes, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, K. Johannsen, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforge, R. Lander, M.P.J. Landon, W. Lange, U. Langenegger, J.-F. Laporte, A. Lebedev, F. Lehner, C. Leverenz, S. Levonian, Ch. Ley, G. Lindström, M. Lindstroem, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, H. Lohmander, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, T. Merz, A. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg_Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, H. Pawletta, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, H. Rick, V. Riech, J. Riedlberger, F. Riepenhausen, S. Riess, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, N. Sahlmann, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, H. Steiner, B. Stella, A. Stellberger, J. Stier, J. Stiewe, U. Stöβlein, K. Stolze, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, D. Vandenplas, P. Van Esch, P. Van Mechelen, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, A. Walther, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, K. Zuber, and M. zurNedden
- Subjects
Quantum chromodynamics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Proton ,Meson ,High Energy Physics::Phenomenology ,Order (ring theory) ,Parton ,HERA ,Charm quark ,High Energy Physics::Experiment ,Rapidity ,Nuclear Experiment - Abstract
At the electron-proton collider HERA the inclusive D-*+/- meson photoproduction cross section has been measured with the H1 detector in two different, but partly overlapping, kinematical regions. For the first, where [W-gamma p] approximate to 200 GeV and Q(2) < 0.01 GeV2, the result is sigma(gamma p --> c(c) over barX$) = (13.2 +/- 2.2(-1.7-4.8)(+2.1+9.9)) mu b. The second measurement for Q(2) < 4 GeV2 yields sigma(gamma p) --> c(c) over barX$) = (9.3 +/- 2.1(-1.8-3.2)(+1.9+6.9)) mu b at [W-gamma p] approximate to 142 GeV and sigma(gamma p --> c(c) over barX$) = (20.6 +/- 5.5(-3.9-7.2)(+4.3+15.4)) mu b at [W-gamma p] approximate to 230 GeV, respectively. The third error accounts for an additional uncertainty due to the proton and photon parton density parametrizations. Differential cross sections are presented as a function of the D-*+/- transverse momentum and rapidity. The results compare reasonably well with next-to-leading order QCD calculations. Evidence for diffractive photoproduction of charm quarks is presented.
- Published
- 1996
30. Elastic electroproduction of ϱ and mesons at large Q2 at HERA
- Author
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S. Aid, V Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançoni, R. Beyer, P. Biddulph, P. Bispham, J.C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, W. Büsser, A. Buniatian, S. Burke, M.J. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlanf, A. Courauab, M.-C. Cousinou, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, C.L. Davis, B. Delcourt, A. De Roec, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, D. Dullmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, A.B. Fahr, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, J. Formanek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, A. Glazov, U. Goerlac, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, R. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, M. Hampel, W.J. Haynes, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Johnson, K. Johannsen, D.P. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforgei, R. Lander, M.P.J. Landon, W. Lange, U. Langenegger, J.-F. Laporte, A. Lebedev, F. Lehner, C. Leverenz, S. Levonian, Ch. Ley, G. Lindström, M. Lindstroem, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, H. Lohmander, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meyer, T. Merz, A. Meyer, H. Meyer, J. Meyer, R-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, G. Müller, K. Miiller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, H. Pawlett, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, H. Rick, V. Riech, J. Riedlberger, F. Riepenhausen, S. Riess, E. Rizvi, S.M. Robertson, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, N. Sahlmann, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, H. Steiner, B. Stella, A. Stellberger, J. Stier, J. Stiewe, U. Stöβlein, K. Stolze, U. Straumann, W. Struczinski, J.P Sutton, S. Tapprogge, [au M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkdrovd, C. Vallée, D. Vandenplas, P. Van Esch, P. Van Mechelen, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, A. Walther, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, F. Zomer, J. Zsembery, K. Zuber, and M. zurNedden
- Subjects
Physics ,Nuclear and High Energy Physics ,Cross section (physics) ,Particle physics ,Luminosity (scattering theory) ,Meson ,Proton ,Momentum transfer ,Theoretical models ,High Energy Physics::Experiment ,HERA ,Nuclear Experiment - Abstract
The total cross sections for the elastic electroproduction of $\rh0$ and $J/\Psi$ mesons for $Q^2$ $>$ 8 GeV$^2$ and $ \simeq 90$ GeV/c$^2$ are measured at HERA with the H1 detector. The measurements are for an integrated electron$-$proton luminosity of $\simeq$~3~pb$^{-1}$. The dependences of the total virtual photon$-$proton ($\gamma^* p$) cross sections on $Q^2$, $W$ and the momentum transfer squared to the proton ($t$), and, for the $\rho$, the dependence on the polar decay angle ($\cos \theta^*$), are presented. The $J/\Psi$ : $\rh0$ cross section ratio is determined. The results are discussed in the light of theoretical models and of the interplay of hard and soft physics processes.
- Published
- 1996
31. Study of charged—currentep interactions atQ 2>200 GeV2 with the ZEUS detector at HERA
- Author
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WN Cottingham, D.D. Reeder, M. Wodarczyk, H. Park, P. B. Kaziewicz, H. Uijterwaal, U. Wollmer, Roberto Sacchi, Ulf Behrens, H.G.J.M. Tiecke, B. Surrow, F. Benard, M.A.J. Botje, Fernando Barreiro, S. Mengel, J. Mainusch, J.B. Lane, Gy. Wolf, Yasunori Yamazaki, D. Simmons, Avto Kharchilava, W. Schott, Cd Catterall, Federico Cindolo, R. R. McNeil, W. Bogusz, Cristiana Peroni, Aharon Levy, Thomas Trefzger, K.F. Johnson, J. N. Lim, Mauro Morandin, Z. Jakubowski, Ricardo Graciani, Samuel Silverstein, H.-P. Jakob, John Hart, P. Nylander, K. K. Joo, A. Bruni, L. W. Hung, F. Palmonari, R. Sinkus, O. Mańczak, G. F. Hartner, R. J. Cashmore, Miriam Lucio Martinez, S. B. Lee, Andrea Contin, A. Kruse, S. Wölfle, Laurel E. Sinclair, M. Löwe, Katsuo Tokushuku, L. Hagge, Antonino Zichichi, Aleksander Filip Żarnecki, Silvia Maselli, R. Cross, M. Derrick, T. Tymieniecka, U. Kötz, R. L. Saunders, M. de Kamps, H. J. Kim, Giovanni Maccarrone, D. Hochman, C. Rembser, T. Ishii, F. J. Sciulli, T. Monteiro, S. Polenz, S. Schlenstedt, Amedeo Staiano, U. F. Katz, M. Pfeiffer, D. Filges, R. J. Tapper, D. Revel, Z. Duliński, J. Gilmore, Lucia Votano, Enrico Tassi, J. J. Whitmore, Giancarlo Susinno, Masami Chiba, R. Brugnera, S.H. An, P. J. Bussey, N. A. McCubbin, Marcella Capua, A. Meyer, K. Umemori, Mariusz Przybycien, D. Horstmann, N. H. Brook, V. L. Harris, V. K. Nadendla, M. Corradi, C. Nath, S. Yang, H. Heßling, J. F. Martin, I. Gialas, R. J. Nowak, F. Selonke, E. Hilger, Matthias Kasemann, V. A. Kuzmin, S. Campbell-Robson, H.J. Grabosch, J. P. Fernandez, Umberto Dosselli, Rosario Nania, Sung Keun Park, Cg Matthews, M. Roco, M. Rohde, Danuta Kisielewska, Marcel Vreeswijk, D Piccioni, N. Cartiglia, T. Tsurugai, O. Deppe, W. N. Murray, D. C. Bailey, J. Del Peso, M. De Giorgi, C. Youngman, A. M. Cooper-Sarkar, S. Dagan, D. Notz, G. Cases, A. Nigro, T. Massam, A.S. Proskuryakov, T. Yip, M. Inuzuka, R. van Woudenberg, A. Seiden, R. Stanek, W. Liu, K. Desler, R. J. Seifert, Leszek Adamczyk, I. A. Korzhavina, M. Khakzad, Janusz Chwastowski, M. L. Cardy, K. Homma, James Crittenden, Yu. A. Golubkov, M. Krzyżanowski, J. Ciborowski, M.I. Ferrero, M. St-Laurent, C. Coldewey, D.C. Williams, B. D. Burow, R. Loveless, ME Hayes, Luca Stanco, J.H. Vossebeld, E. Barberis, C.-P. Fagerstroem, A. Eskreys, A. T. Doyle, Y. Zamora Garcia, T. Voß, R. Ullmann, M. Nakao, P. Borzemski, R. G. Feild, M. Geerts, M. Posocco, T. W. Jones, A. N. Solomin, A. H. Walenta, DG Roff, L. Labarga, E. A. De Wolf, J. K. Sedgbeer, M. Eckert, L. Bellagamba, A.S. Wilson, L. Lamberti, Wouter Verkerke, C.R. Sampson, U. Mallik, Greg P Heath, J. R. Okrasinski, Jeffrey T. Rahn, L. M. Shcheglova, M. Grothe, P. Giusti, Gm Levman, B.Y. Oh, G. Zacek, G. L. Bashindzhagyan, A. Pesci, W.B. Schmidke, G. Drews, R. J. Teuscher, P. M. Patel, L. Heinz, J. A. Parsons, P. Joos, J. Stamm, A.F. Whitfield, S. W. Nam, B. A. Dolgoshein, Stefano Maria Mari, A. Quadt, D. S. Bailey, O. Schwarzer, Helen F Heath, J. Große-Knetter, V.A. Noyes, J.J. Engelen, Giuseppe Iacobucci, N. Pavel, J. R. Tickner, B. Foster, D. S. Waters, D. Krakauer, Jens Hartmann, G. Bruni, W. Hain, Z. Jing, M. Dardo, P.M. Kooijman, A. Dannemann, B. Lu, M. Brkic, J. Shulman, S. Ritz, D. S. Hanna, Vladimir Bashkirov, C. Amelung, M. L. Utley, N. Wulff, M. Riveline, M. Lancaster, J.T. Wu, Juan Terron, M. Kasprzak, K. Yamauchi, Y. Iga, J. Zając, H. Kowalski, A. Frey, M. Flasiński, N. Dyce, C. Voci, B. H. Y. Hung, J. K. Bienlein, Anselmo Margotti, L.W. Wiggers, E. Rulikowska-Zarebska, C. Li, P. Antonioli, A.I. van Sighem, K. Wick, G. Abbiendi, J.D. McFall, Marco Schioppa, G. Grzelak, T. C. Bacon, D. Hasell, G. D'Agostini, S. Mattingly, D. Schramm, C. A. Heusch, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, D. Mikunas, G. Howell, J. Bulmahn, J. I. Fleck, D. Lüke, A. Polini, P.F. Ermolov, P. Bruni, P. G. Pelfer, T.P. Shah, Mark Sutton, T. Doeker, G. Briskin, Q. Zhu, S. M. Wang, D. H. Saxon, Costas Foudas, L.W. Mo, J. A. Zakrzewski, D. Westphal, F. Zuin, T. Y. Ling, S. Kartik, L. Lindemann, S. De Pasquale, M.C.K. Mattingly, U. Karshon, L. S. Durkin, E. Lohrmann, D. Zer-Zion, C. Glasman, P. Göttlicher, R. Hamatsu, Luis Hervas, I. Suzuki, S. Mine, D. Boscherini, R. Yoshida, J. Puga, Robert Klanner, A. Vaiciulis, R. S. Orr, A. Caldwell, G. Castellini, William S. Lockman, Michele Arneodo, H. F.W. Sadrozinski, J.S.T. Ng, Y. Eisenberg, D.J. Gilkinson, R. Walczak, J. M. Pawlak, P. B. Straub, Kenneth Long, R. Deffner, M. Adamus, A. Bornheim, K. Heinloth, A. Garfagnini, G. Bari, Giuseppe Barbagli, A. Ladage, J. Roldán, Hao Zhang, S. Magill, W. Schulz, G. Marini, Francois Corriveau, M. Van Hook, A. Kotański, K. Muchorowski, B. Bednarek, Np Zotov, I. H. Park, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Ben Bylsma, J. Milewski, O. Yu. Lukina, G. Sartorelli, R. Wedemeyer, M. Przybycien, B. J. Ko, H. Hartmann, L.A.T. Bauerdick, Giuseppe Levi, F. Zetsche, A. A. Savin, L. Suszycki, K. Jelen, S. Eisenhardt, Roberto Carlin, W.R. Frisken, Sridhara Dasu, D. Chapin, Halina Abramowicz, A. Bertolin, U. Schneekloth, J. F. de Trocóniz, I. Butterworth, F. Dal Corso, L. Zawiejski, Roberto Cirio, A. Cassidy, W.F. Badgett, Ta Romanowski, B. Musgrave, E. Paul, A. Stifutkin, F. F. Wilson, Jonathan Butterworth, B. Löhr, R. L. Talaga, S. Kitamura, Ada Solano, S. Limentani, M. Z. Wang, S. Bhadra, M. Zachara, Shoichi Yamada, R.C.E. Devenish, G. Laurenti, L. Iannotti, A. Prinias, Elisabetta Gallo, W. Koch, H. Beier, Tadeusz Kowalski, G. Poelz, Lutz Feld, J.T. Bromley, W. Metcalf, U. Holm, D. Acosta, Dg Stairs, Krzysztof Piotrzkowski, D. Sideris, D. B. Miller, Jose Repond, K. Ohrenberg, J. Gajewski, W. H. Smith, Mário Costa, G. H. Cho, J. Labs, F.S. Chlebana, M. Basile, T. Haas, V. D. Kobrin, T. Dubbs, J. Biltzinger, P. Cloth, R. Ayad, J. Breitweg, J. M. Hernandez, G. Cara Romeo, N. Brümmer, Simon George, Tachishige Hirose, M. Kuze, T. Matsushita, L. Wai, and R. Stroili
- Subjects
Nuclear physics ,Physics ,Particle physics ,Physics and Astronomy (miscellaneous) ,Rapidity ,Center of mass ,HERA ,Zeus (malware) ,Energy (signal processing) ,Boson ,Bar (unit) - Abstract
Deep inelastic charged-current reactions have been studied ine+p ande−p collisions at a center of mass energy of about 300GeV in the kinematic regionQ2>200GeV2 andx>0.006 using the ZEUS detector at HERA. The integrated cross sections forQ2>200GeV2 are found to be \(\sigma _{e^ + p \to \bar \nu X} = 30.3_{ - 4.2 - 2.6}^{ + 5.5 + 1.6} pb\) and \(\sigma _{e^ - p \to \nu X} = 54.7_{ - 9.8 - 3.4}^{ + 15.9 + 2.8} pb\). Differential cross sections have been measured as functions of the variablesx, y andQ2. From the measured differential cross sectionsdσ/dQ2, theW boson mass is determined to be \(M_W = 79_{ - 7 - 4}^{ + 8 + 4} GeV\). Measured jet rates and transverse energy profiles agree with model predictions. A search for charged-current interactions with a large rapidity gap yielded one candidate event, corresponding to a cross section of \(\sigma _{e^ + p \to \bar \nu X} (Q^2 > 200 GeV^2 ; \eta _{\max }< 2.5) = 0.8_{ - 0.7}^{ + 1.8} \pm 0.1 pb\)
- Published
- 1996
32. Measurement of elasticρ 0 photoproduction at HERA
- Author
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D.D. Reeder, A. Bertolin, B. Diekmann, M. Wodarczyk, M. Lancaster, J.T. Wu, J. Zając, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, S.H. An, D. Mikunas, H.-P. Jakob, P. Morawitz, Rosario Nania, Sung Keun Park, R. L. Saunders, B. Musgrave, M. St.Laurent, G. Briskin, P. B. Kaziewicz, D. Krakauer, L. Lamberti, Simon George, Detlef Filges, Q. Zhu, R. Brugnera, P.M. Kooijman, Miguel Molina Martínez, H. Uijterwaal, E. Gallo, M. Roco, E. McCliment, V. A. Kuzmin, D. C. Bailey, Tachishige Hirose, M.C.K. Mattingly, L. S. Durkin, A. Dannemann, A. Stifutkin, M. De Giorgi, M. L. Utley, J. Shulman, T. Tsurugai, Aleksander Filip Żarnecki, Silvia Maselli, R. Hamatsu, A. Seiden, J. Puga, B. Surrow, Gm Levman, Giuseppe Barbagli, J. Bulmahn, D. S. Waters, Juan Terron, M. Kasprzak, M. Kuze, E. Rulikowska-Zarebska, J. I. Fleck, Y. Nagasawa, R. S. Orr, G. Zech, M. Flasiński, Vladimir Bashkirov, S.S. Wilson, A. Nigro, P. B. Straub, Kenneth Long, K. Yamauchi, S. Mengel, J. Mainusch, A. Eskreys, A. T. Doyle, A. Byrne, J. A. Zakrzewski, B. Bargende, L. Wai, B. Behrens, D. Horstmann, A. Dake, N. H. Brook, K. Wick, A. Prinias, L. Labarga, Wouter Verkerke, G. Bari, C.J.S. Morgado, M. Adamus, G. Marini, V. L. Harris, Michele Arneodo, D. C. Williams, R. Stroili, L. M. Shcheglova, T.L. Short, B. A. Dolgoshein, N. Bruemmer, Cg Matthews, M. de Kamps, H. J. Kim, Giovanni Maccarrone, S. Schlenstedt, P. J. Bussey, Giovanna Bruni, M. Van Hook, B. Bednarek, R. Yoshida, Np Zotov, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Avto Kharchilava, W. Schott, Cd Catterall, W. Koch, M. Eckert, L. Bellagamba, A.F. Whitfield, S. W. Nam, L. Köpke, C. Fordham, R. Loveless, Giuseppe Iacobucci, M. Rohde, A. M. Cooper-Sarkar, S. Dagan, M. Khakzad, M. L. Cardy, Roberto Sacchi, J.J. Engelen, J. M. Pawlak, A. Garfagnini, N. Pavel, I. Suzuki, William S. Lockman, J. F. Martin, Jose Repond, K. Ohrenberg, F. Zetsche, H. Beier, D. J. P. Norman, K. Honscheid, Aharon Levy, Y. Nakamitsu, Katsuo Tokushuku, T. Yip, F. J. Sciulli, I. H. Park, G. Grzelak, H.G.J.M. Tiecke, F. Benard, Roberto Carlin, Yu. A. Golubkov, E. Paul, M. Geerts, K. Blankenship, C.R. Sampson, P. Giusti, G. Zacek, G. Drews, J. A. Parsons, J. N. Lim, Cristiana Peroni, R. Sinkus, A. Freidhof, R. J. Tapper, G. F. Susinno, R. J. Cashmore, A. A. Savin, M. Derrick, M. Posocco, Geoffrey Smith, S. Ritz, D. S. Hanna, Anselmo Margotti, L.W. Wiggers, T. Tymieniecka, L. Suszycki, Jeffrey T. Rahn, Umberto Dosselli, P. M. Patel, Janusz Chwastowski, J. A. O'Mara, A. Bernstein, Y. Zamora Garcia, T. Voß, C. Youngman, V.A. Noyes, Tadeusz Kowalski, D. Acosta, S. Nickel, D. B. Miller, B. D. Burow, Ben Bylsma, J. Milewski, W.N. Murray, G. Anzivino, W. H. Smith, Mário Costa, H. Hartmann, Dg Stairs, U. Kötz, T. C. Bacon, J.B. Lane, J. Mollen, G. Poelz, Masashi Hazumi, E. A. De Wolf, J. Gajewski, A. Frey, M. Nakao, P. Borzemski, Giuseppe Levi, Gy. Wolf, Rr Rau, K. Jelen, J. R. Tickner, J. Ciborowski, S. Polenz, C. Rembser, Marcel Vreeswijk, R. Ullmann, P. Nylander, F.S. Chlebana, N. A. McCubbin, K. K. Joo, V. K. Nadendla, Masami Chiba, Klaus Kurt Desch, James Crittenden, O. Mańczak, T.P. Shah, S. M. Wang, D. H. Saxon, R. J. Nowak, M. Grothe, F. Selonke, E. Hilger, W.R. Frisken, J. Labs, G. F. Hartner, Ulf Behrens, Federico Cindolo, W. Bogusz, H. Kowalski, J. P. Fernandez, M. Dardo, C. Coldewey, Lutz Feld, M. Basile, A. B. Meyer, T. Haas, V. D. Kobrin, T. Dubbs, Samuel Silverstein, A.S. Wilson, Antonino Zichichi, P. Göttlicher, E. Stiliaris, D. Lüke, J. Del Peso, J. Biltzinger, A. Polini, K. Prytz, U. Schneekloth, W. Metcalf, M. Krzyżanowski, I. A. Korzhavina, S. De Pasquale, R. Ayad, I. Butterworth, M. H. Suh, U. Holm, B. Lu, L.E. Sinclair, D. Westphal, L. Hagge, Marco Schioppa, R. J. Seifert, P. G. Pelfer, Sridhara Dasu, B.Y. Oh, U. Karshon, A.S. Proskuryakov, R. Seidlein, Stefano Maria Mari, G. Cara Romeo, T. Ishii, K. Homma, Luis Hervas, D. Boscherini, R. van Woudenberg, A. Quadt, J. M. Hernandez, M. Zachara, Krzysztof Piotrzkowski, Ta Romanowski, G. Castellini, Shoichi Yamada, Fernando Barreiro, C. Li, J.S.T. Ng, R.C.E. Devenish, B. Y. H. Hung, F. Dal Corso, Halina Abramowicz, T. Hasegawa, H. F.W. Sadrozinski, A. Leich, W.F. Badgett, F. F. Wilson, M. Chiarini, G. Cases, Mauro Morandin, Danuta Kisielewska, G. Laurenti, Debades Bandyopadhyay, T. Massam, L. W. Hung, Jonathan Butterworth, T. J. Llewellyn, I. Ali, D. S. Bailey, D. Schramm, O. Schwarzer, S. M. Hong, Helen F Heath, R. L. Talaga, E. Tassi, Matthias Kasemann, I. Gialas, Jens Hartmann, L. Iannotti, K. M. Furutani, E. Lohrmann, D. Revel, Mariusz Przybycien, D. Notz, M. Corradi, S. Yang, J. Schroeder, A. H. Walenta, S. Campbell-Robson, R.S. Gilmore, W. Schulz, H.J. Grabosch, E. Barberis, J. K. Bienlein, O. Deppe, A. N. Solomin, S. H. Yon, U. Mallik, T. W. Jones, Anna Goussiou, Leszek Adamczyk, Yasunori Yamazaki, G. L. Bashindzhagyan, B. Gutjahr, Greg P Heath, John Hart, W.B. Schmidke, R. J. Teuscher, M.I. Ferrero, J. Große-Knetter, Douglas Gingrich, R. G. Feild, R. R. McNeil, K. Charchuła, A. Bruni, M. Löwe, S. Kartik, J.D. McFall, K. Muchorowski, R. Wedemeyer, J. J. Whitmore, Francois Corriveau, C. A. Heusch, J.F. Zhou, P.F. Ermolov, W. Hain, A. Kotański, P. Bruni, Costas Foudas, L.W. Mo, A. Caldwell, Christian Nemoz, L.A.T. Bauerdick, M.A.J. Botje, D. Zer-Zion, K.W. McLean, Ricardo Graciani, Y. Iga, A. Ladage, S. Söldner-Rembold, C. P. Fagerstroem, N. Dyce, Amedeo Staiano, O. Yu. Lukina, U. F. Katz, M. Pfeiffer, P. Cloth, R. Imlay, Ada Solano, C. Voci, S. Limentani, S. Magill, T. Doeker, M. Z. Wang, S. Bhadra, J. Gilmore, T. Timellini, A. Cassidy, R. Stanek, E. Badura, M. Nakahata, Luca Stanco, J. K. Sedgbeer, T. Neumann, B. Löhr, K. Desler, S. Kitamura, Thomas Trefzger, K.F. Johnson, Hao Zhang, Andrea Contin, A. Kruse, T. Monteiro, S. Eisenhardt, Marcella Capua, N. Cartiglia, C. Glasman, S. Mine, A. Bornheim, F. Palmonari, P. Joos, J. Stamm, B. Foster, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, Y. Eisenberg, D.J. Gilkinson, R. Walczak, K. Heinloth, J. Roldán, G. Sartorelli, M. Brkic, N. Wulff, D. Hasell, G. D'Agostini, T. Y. Ling, L. Lindemann, Giovanni Abbiendi, Robert Klanner, A. Vaiciulis, Lucia Votano, C. Nath, and H. Heßling
- Subjects
Nuclear physics ,Physics ,Cross section (physics) ,ZEUS (particle detector) ,Pion ,Physics and Astronomy (miscellaneous) ,Proton ,Vertex (curve) ,High Energy Physics::Experiment ,Invariant mass ,HERA ,Nuclear Experiment ,Helicity - Abstract
Elasticρ0 photoproduction has been measured using the ZEUS detector at HERA. Untagged photoproduction events fromep interactions were used to measure the reactionγp→ρ0p(ρ0)→π+π−) at photon-proton centre-of-mass energies between 60 and 80 GeV and |t
- Published
- 1995
33. Measurement of the proton structure functionF 2 at lowx and lowQ 2 at HERA
- Author
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D. Krakauer, M. L. Utley, J. Mollen, J. I. Fleck, Y. Nagasawa, P. Nylander, K. K. Joo, O. Mańczak, G. F. Hartner, R. Yoshida, J. A. Zakrzewski, Thomas Trefzger, F. J. Sciulli, K.F. Johnson, P. Bruni, Costas Foudas, A. M. Cooper-Sarkar, S. Dagan, M. Khakzad, M. L. Cardy, K. Honscheid, Yu. A. Golubkov, Vladimir Bashkirov, H. Tiecke, M. Posocco, Geoffrey Smith, L.W. Mo, Andrea Contin, C. Händel-Pikielny, J. F. Martin, N. Bruemmer, Christian Nemoz, A. Caldwell, A. Frey, F. Selonke, L. Köpke, Ulf Behrens, Federico Cindolo, W. Bogusz, A. Cassidy, Y. Iga, N. Dyce, J. Ciborowski, A. Kruse, D. Schramm, C. A. Heusch, E. Hilger, G. Grzelak, R. Ullmann, C. Voci, T. Monteiro, J. M. Pawlak, T. C. Bacon, T. Yip, Mariusz Przybycien, M. Corradi, A. Bernstein, Y. Zamora Garcia, T. Voß, M. Nakahata, Cg Matthews, M.A.J. Botje, Marcella Capua, W. Metcalf, U. Holm, A. Garfagnini, Fernando Barreiro, Mauro Morandin, Hao Zhang, M. Dardo, C. Coldewey, S. Yang, Jens Hartmann, P. Cloth, N. Pavel, I. Suzuki, William S. Lockman, K.W. McLean, S. Nickel, D. B. Miller, J. Gajewski, A. Ladage, Ricardo Graciani, S. Söldner-Rembold, K. Prytz, N. Cartiglia, K. Muchorowski, P. Kooijman, L. W. Hung, T. Neumann, Lucia Votano, T.P. Shah, E. Lohrmann, B. Löhr, C. Nath, C. P. Fagerstroem, H. Heßling, F. Palmonari, M. Krzyżanowski, W. N. Murray, S. M. Wang, S. De Pasquale, D. H. Saxon, I. H. Park, O. Yu. Lukina, Ben Bylsma, D. Lüke, A. Polini, S. Campbell-Robson, S. Kitamura, Amedeo Staiano, U. F. Katz, R. Wedemeyer, M. Basile, Rosario Nania, Sung Keun Park, J. K. Bienlein, T. Doeker, J. Milewski, S. Eisenhardt, Y. Eisenberg, H.J. Grabosch, S. Kartik, P. Göttlicher, J. Gilmore, M. Pfeiffer, T. Haas, V. D. Kobrin, T. Dubbs, Antonino Zichichi, ME Hayes, E. Tassi, A. Nigro, D.J. Gilkinson, B. Lu, S. W. Nam, R. Ayad, R. Walczak, J. Biltzinger, B.Y. Oh, M. H. Suh, M. Zachara, Krzysztof Piotrzkowski, K. Heinloth, Giuseppe Barbagli, D. Filges, J. Roldán, M. Eckert, L. Bellagamba, Shoichi Yamada, R.C.E. Devenish, Francois Corriveau, H. Hartmann, E. McCliment, D. Revel, G. Cara Romeo, A. Dannemann, H.-P. Jakob, P. Joos, R. L. Saunders, O. Deppe, J. Stamm, A.F. Whitfield, A. Kotański, A. Meyer, A. Seiden, G. Laurenti, L.A.T. Bauerdick, B. Foster, M. Lancaster, J. M. Hernandez, R. Brugnera, C. Li, G. Sartorelli, J.T. Wu, J.R. Okrasiński, J. Bulmahn, J. Zając, Yasunori Yamazaki, G. Cases, D. C. Bailey, B. Gutjahr, V. A. Kuzmin, R. Stanek, M. De Giorgi, C. Youngman, A. Eskreys, A. T. Doyle, L. Labarga, Wouter Verkerke, R. R. McNeil, E. Badura, D. Mikunas, W. N. Cottingham, C. Fordham, Luisa Cifarelli, L. K. Gladilin, Neville Harnew, P. Morawitz, B. Y. H. Hung, Sridhara Dasu, Marcel Vreeswijk, T.L. Short, D Piccioni, B. A. Dolgoshein, John Hart, W. Schulz, Luca Stanco, K. Desler, L. Iannotti, Ada Solano, Gm Levman, S. Ritz, D. S. Hanna, Halina Abramowicz, D. C. Williams, D. S. Waters, S. Limentani, J. Del Peso, Aleksander Filip Żarnecki, Silvia Maselli, G. Briskin, E. Rulikowska-Zarcebska, Roberto Carlin, M. de Kamps, K. Charchuła, K. Yamauchi, Q. Zhu, M. Brkic, L.E. Sinclair, K. Homma, H. J. Kim, C. Glasman, N. Wulff, Cristiana Peroni, R. J. Cashmore, Roberto Sacchi, H. Kowalski, M. Z. Wang, D. Hasell, G. D'Agostini, Giovanni Maccarrone, J. K. Sedgbeer, Anselmo Margotti, Simon George, S. Mine, S. Schlenstedt, S. Bhadra, A. Bruni, T. Y. Ling, L. Lindemann, L.W. Wiggers, P. J. Bussey, M. Löwe, Tachishige Hirose, J.D. McFall, D. Horstmann, R. Timellini, A. Dake, N. H. Brook, V. L. Harris, B. D. Burow, Giovanni Abbiendi, Robert Klanner, A. Vaiciulis, G. Bruni, M. Derrick, A. Prinias, Elisabetta Gallo, T. Tymieniecka, A. Bornheim, E. Barberis, J. A. O'Mara, P.F. Ermolov, Jose Repond, G. Anzivino, K. Ohrenberg, Giuseppe Levi, W. Koch, M. Rohde, Danuta Kisielewska, A. N. Solomin, U. Kötz, U. Mallik, Aharon Levy, D. Westphal, P. Giusti, J. T. Rahn, M. Nakao, P. Borzemski, M. Kuze, T. Massam, J. N. Lim, A. Bertolin, Greg P Heath, K. Jelen, J. Engelen, G. Zacek, G. Drews, J. A. Parsons, U. Karshon, H. Beier, A.S. Wilson, J. J. Whitmore, W. Hain, R. Sinkus, Luis Hervas, D. Zer-Zion, J. F. de Trocóniz, L. Zawiejski, W.R. Frisken, I. Ali, D. Boscherini, Tadeusz Kowalski, V. K. Nadendla, R. J. Nowak, W. H. Smith, J. Große-Knetter, Roberto Cirio, D. S. Bailey, O. Schwarzer, Helen F Heath, G. Poelz, J.F. Zhou, G. Castellini, L. Wai, Mário Costa, A. H. Walenta, DG Roff, Lutz Feld, M.C.K. Mattingly, L. S. Durkin, Douglas Gingrich, Giancarlo Susinno, B. Musgrave, M. St.Laurent, J.S.T. Ng, R. Stroili, R. Hamatsu, R. Imlay, K. Wick, E. Paul, J. Puga, F.S. Chlebana, U. Schneekloth, A. Stifutkin, I. Gialas, I. Butterworth, S. Magill, M. Adamus, J. Schroeder, S. Polenz, Ta Romanowski, G. Marini, Np Zotov, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Masami Chiba, Klaus Kurt Desch, Matthias Kasemann, K. M. Furutani, F. F. Wilson, M. Chiarini, Leszek Adamczyk, Jonathan Butterworth, J. P. Fernandez, D. Notz, I. A. Korzhavina, M.I. Ferrero, S. H. Yon, D. Acosta, T. W. Jones, Anna Goussiou, Dg Stairs, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, R. G. Feild, J. Labs, A. Freidhof, James Crittenden, M. Grothe, L. Heinz, R. S. Orr, P. B. Straub, Kenneth Long, F. Dal Corso, Marco Schioppa, P. G. Pelfer, B. Behrens, G. Bari, R. Seidlein, T. Hasegawa, M. Van Hook, B. Bednarek, A. Leich, W.F. Badgett, H. F.W. Sadrozinski, F. Zetsche, Y. Nakamitsu, Katsuo Tokushuku, R. J. Tapper, J. Shulman, Umberto Dosselli, Debades Bandyopadhyay, Janusz Chwastowski, E. A. De Wolf, J. R. Tickner, D.D. Reeder, Juan Terron, M. Kasprzak, B. Diekmann, G. Zech, M. Flasiński, M. Wodarczyk, S. M. Hong, Masashi Hazumi, R. L. Talaga, C. Rembser, N. A. McCubbin, Samuel Silverstein, E. Stiliaris, L. Hagge, P. B. Kaziewicz, T. Ishii, R. J. Seifert, L. Lamberti, Stefano Maria Mari, A. Quadt, H. Uijterwaal, L. M. Shcheglova, A.S. Proskuryakov, C.J.S. Morgado, Michele Arneodo, R. van Woudenberg, F. Benard, M. Martinez, A. A. Savin, L. Suszycki, Giuseppe Iacobucci, R. Loveless, M. Geerts, K. Blankenship, C.R. Sampson, J.B. Lane, P. M. Patel, Gy. Wolf, Rr Rau, B. Surrow, S.H. An, V.A. Noyes, M. Roco, T. Tsurugai, S. Mengel, J. Mainusch, A. Byrne, Avto Kharchilava, W. Schott, and Cd Catterall
- Subjects
Nuclear physics ,Physics ,Range (particle radiation) ,Physics and Astronomy (miscellaneous) ,Proton ,law ,Structure (category theory) ,Perturbative QCD ,HERA ,Collider ,Deep inelastic scattering ,law.invention ,Positron energy - Abstract
We report on a measurement of the proton structure function F 2 in the range 3.5×10-5≤x≤4×10-3 and 1.5 GeV2≤Q 2≤15GeV2 at the ep collider HERA operating at a centre-of-mass energy of √s=300GeV. The rise of F 2 with decreasing x observed in the previous HERA measurements persists in this lower x and Q 2 range. The Q 2 evolution of F 2, even at the lowest Q 2 and x measured, is consistent with perturbative QCD. © 1996 Springer-Verlag.
- Published
- 1995
34. Measurement of the total photon proton cross section and its decomposition at 200 GeV centre of mass energy
- Author
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C. Cormack, G. G. Winter, C. Vallée, J. Martens, P. Steffen, R. D. Appuhn, F. Kole, K. Rüter, U. Stößlein, C. Niebuhr, J. H. Köhne, D. Zarbock, H. P. Wellisch, R. Nahnhauer, D. Goldner, Max Weber, E. Malinovski, E. Barrelet, David Cussans, P. Goritchev, B. Laforge, Y. Soloviev, T. Carli, M. Kuhlen, G. Grindhammer, Paul Newman, V. L. Hudgson, E. A. De Wolf, Ch. Berger, Karlheinz Meier, K. Rosenbauer, C. Wittek, G. Lindström, C. Gruber, Dusan Bruncko, K. Rybicki, D. Neyret, L. Büngener, H. Krehbiel, A. Pieuchot, T. Mavroidis, B. Naroska, F. Ferrarotto, M. Jaffre, J. E. Olsson, H. Genzel, A. Lebedev, M. Korn, S. Egli, Christoph Grab, G. Thompson, W. Bartel, I. Herynek, K. Daum, G. Knies, T. Greenshaw, P. Bispham, J. Haack, Stephen Maxfield, I. O. Skillicorn, H. B. Dreis, U. Bassler, M. Charlet, G. Buschhorn, G. Bertrand-Coremans, R. Starosta, D. Ozerov, D. Düllmann, Rosario Martín, R. J. Ellison, M. Rietz, D. Haidt, K. C. Hoeger, Murrough Landon, A. E. Wright, H. Itterbeck, Wolfgang Lange, P. Van Mechelen, B. Waugh, G. Weber, H. Henschel, F. W. Büsser, F. Zomer, U. Straumann, H. J. Behrend, J.C. Bizot, M. Goldberg, J. Stiewe, P. Van Esch, E. Evrard, Eram Rizvi, L. Del Buono, L. Criegee, Grzegorz Nowak, W. Braunschweig, C. Jacobsson, A. Gellrich, V. Riech, F. Sefkow, J. P. Sutton, Claus Kleinwort, V. Andreev, G. Heinzelmann, D. Kant, Kerstin Borras, A. Semenov, M. Fleischer, P. Ribarics, T. Jansen, R. Felst, J. Formánek, A. B. Clegg, Andrew Mehta, S. Schiek, S. Tapprogge, H. Spitzer, Armen Vartapetian, M. Hapke, R. Sell, Benno List, J. Gayler, I. R. Kenyon, S. Kazarian, G. Villet, Barbara Clerbaux, R. Kaschowitz, Pierre Marage, E. Mroczko, M. Gebauer, B. Delcourt, D. Vandenplas, H. Küster, F. Brasse, V. Korbel, W.D. Dau, D. Lüke, A. Wegner, N. Gogitidze, H. Rick, J. B. Dainton, U. Siewert, F. Lamarche, A. Rostovtsev, A. Droutskoi, G. Rädel, C. Leverenz, J. Garvey, O. Hamon, S. Levonian, J. Zsembery, J. M. Link, E. Panaro, J. Kurzhöfer, H. Ehrlichmann, E. Wünsch, V. Solochenko, M. Zimmer, A. M. Fomenko, J. D. Dowell, Dave Sankey, M. Wagener, Roland Horisberger, A. Valkárová, U. Kathage, Vincent Boudry, M. Hampel, B. Kuznik, A. Meyer, Ph. Huet, V. Brisson, Yves Sirois, Jean-Francois Laporte, V. Nagovizin, G. D. Patel, P. Loch, S. Riess, Ch. Pichler, K. Gabathuler, A. Buniatian, Jean-Arcady Meyer, D. Wegener, W.J. Haynes, R. Gerhards, M. J. Burton, J. Lipinski, R. Bernet, K. Flamm, G. Franke, Yong Ban, N. Magnussen, K. Johannsen, P. Verrecchia, J. Žáček, A. Courau, Christophe Royon, J. Feltesse, S. Eichenberger, G. Martin, David Schmidt, J. Bähr, S. Spielman, T. Köhler, M. W. Krasny, V. Schröder, S. Schleif, K. H. Hiller, R. C. W. Henderson, N. Sahlmann, H. H. Kaufmann, Eckhard Elsen, Wolfram Erdmann, E. Schuhmann, Winston Ko, S. Aid, P. I. P. Kalmus, J. V. Morris, G. Schmidt, C. Pascaud, V. Efremenko, P. Hill, F. Linsel, P.-O. Meyer, G. W. Noyes, Martin Erdmann, U. Obrock, Zhen Zhang, Guenter Eckerlin, André Schöning, S. Mani, A. Walther, P. Biddulph, Hermann Kolanoski, D. Clarke, H. E. Roloff, M. Forbush, S. Mikocki, J. Bán, J. Tutas, F. Niebergall, J. D. Burger, H. P. Beck, Stephen Burke, A. Braemer, D. Mercer, M. A. Jabiol, W. Zimmermann, Gianfranco Sciacca, J. Riedlberger, H. Hufnagel, J. W. Lomas, I. Sheviakov, D. Newton, V. Lubimov, R. Prosi, J. Ebert, S. Masson, Leif J. Jönsson, John A Coughlan, A. Usik, K. Stolze, M. Höppner, C. A. Meyer, S. Prell, P. Dixon, H. Lohmander, P. Lanius, A. Gruber, R. Buchholz, L. N. Shtarkov, U. Krüger, A. Migliori, Horst Oberlack, Markus Seidel, A. Glazov, V. Tchernyshov, G. Siegmon, H. U. Martyn, Matthias Klein, David Milstead, P. A. Smirnov, Ch. Ley, A. Panitch, C.D. Hilton, J.G. Contreras, Daniel Johnson, R. Beyer, S. Dagoret, P. Palmen, L. Goerlich, F. Moreau, J. Hladký, F. Lehner, J. Theissen, J. Duboc, B. Stella, D. Feeken, A. Jacholkowska, B. Gonzalez-Pineiro, K. Stephens, E. Peppel, M. Arpagaus, S. D. Kolya, M. Oakden, R. Marshall, Dirk Krücker, R. Roosen, J. Ferencei, V I. Shekelyan, A. Wagener, S. Reinshagen, J. Martyniak, K. Wacker, R. Steinberg, J. Spiekermann, R. L. Lander, Daniel Pitzl, Frank Raupach, S. M. Robertson, N. Wulff, B. Fominykh, P. Kasselmann, F. Charles, J. Katzy, H. K. Nguyen, I. V. Gorelov, K. Müller, R.K. Griffiths, R. Grässler, Ch. Coutures, W. Struczinski, U. Krüner-Marquis, G. Müller, M. F. Hess, Emmanuelle Perez, G. Lobo, P. Kostka, J. M. Foster, S. Bourov, Carl R. Brune, M. Barth, J. Turnau, K. Zuber, Eckhart Fretwurst, M. Steenbock, S. K. Kotelnikov, L. Hajduk, B. Andrieu, H. Meyer, S. Kermiche, W. Hildesheim, J. Cvach, Ch. Niedzballa, P. Di Nezza, Peter Robmann, S. Willard, M. Winde, P. Uelkes, Didier Lacour, M. Hütte, L. Johnson, G. Pope, Steve McMahon, P. Baranov, O. Dünger, F. Botterweck, Peter Schleper, T. Krämerkämper, R. Maraček, W. von Schlippe, Marc Besancon, A.S. Belousov, Sergey Rusakov, T. Merz, P. Truöl, H. Pawletta, R. Nisius, J. R. Smith, E. Eisenhandler, Th. Naumann, H. Duhm, E. Gabathuler, M. David, C.L. Davis, M. Flieser, J. Stier, J. Marks, Y. Vazdik, L.R. West, M. Nyberg-Werther, T. R. Ebert, A. Fedotov, Günter Flügge, T. P. Yiou, M. zurNedden, C. Kiesling, A. De Roeck, A. J. Campbell, T. Kurča, J. Janoth, Volker Blobel, R. Eichler, G. Cozzika, F. Eisele, C. Keuker, J.P. Phillips, Klaus Rabbertz, Stefan Valkar, Hannes Jung, Alexander Zhokin, B. Schwab, Pavel Murin, H. Grässler, M. Ibbotson, R. Barschke, Laurent Favart, C. Dollfus, F. Rouse, Ulrich Goerlach, T. C. Nicholls, Peter Schacht, G. C. Lopez, Gregorio Bernardi, Anton Babaev, C. Thiebaux, J. Strachota, and P. E. Reimer
- Subjects
Nuclear physics ,Physics ,Elastic scattering ,Particle physics ,Cross section (physics) ,Photon ,Physics and Astronomy (miscellaneous) ,Proton ,Detector ,High Energy Physics::Experiment ,Center of mass ,HERA ,Dissociation (chemistry) - Abstract
We present a new measurement of the total photoproduction cross section performed with the H1 detector at HERA. For an average centre of mass energy of 200 GeV a value of σtotλp=165±2±11µb has been obtained. A detailed analysis of the data in adequate kinematic regions enabled a decomposition of the total cross section in its elastic, single diffractive dissociation and remaining non-diffractive parts, based on safe assumptions on the double diffractive dissociation contribution.
- Published
- 1995
35. Measurement of Charged and Neutral Currente−pDeep Inelastic Scattering Cross Sections at HighQ2
- Author
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M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari, A. Polini, G. Sartorelli, R. Timellini, Y. Zamora Garcia, A. Zichichi, A. Bargende, J. Crittenden, K. Desch, B. Diekmann, T. Doeker, M. Eckert, L. Feld, A. Frey, M. Geerts, G. Geitz, M. Grothe, T. Haas, H. Hartmann, D. Haun, K. Heinloth, E. Hilger, H.-P. Jakob, U. F. Katz, S. M. Mari, A. Mass, S. Mengel, J. Mollen, E. Paul, Ch. Rembser, R. Schattevoy, D. Schramm, J. Stamm, R. Wedemeyer, S. Campbell-Robson, A. Cassidy, N. Dyce, B. Foster, S. George, R. Gilmore, G. P. Heath, H. F. Heath, T. J. Llewellyn, C. J. S. Morgado, D. J. P. Norman, J. A. O'Mara, R. J. Tapper, S. S. Wilson, R. Yoshida, R. R. Rau, M. Arneodo, L. Iannotti, M. Schioppa, G. Susinno, A. Bernstein, A. Caldwell, N. Cartiglia, J. A. Parsons, S. Ritz, F. Sciulli, P. B. Straub, L. Wai, S. Yang, Q. Zhu, P. Borzemski, J. Chwastowski, A. Eskreys, K. Piotrzkowski, M. Zachara, L. Zawiejski, L. Adamczyk, B. Bednarek, K. Jeleń, D. Kisielewska, T. Kowalski, E. Rulikowska-Zarȩbska, L. Suszycki, J. Zaja̧c, A. Kotański, M. Przybycień, L. A. T. Bauerdick, U. Behrens, H. Beier, J. K. Bienlein, C. Coldewey, O. Deppe, K. Desler, G. Drews, M. Flasiński, D. J. Gilkinson, C. Glasman, P. Göttlicher, J. Grosse-Knetter, B. Gutjahr, W. Hain, D. Hasell, H. Hessling, H. Hultschig, Y. Iga, P. Joos, M. Kasemann, R. Klanner, W. Koch, L. Köpke, U. Kötz, H. Kowalski, J. Labs, A. Ladage, B. Löhr, M. Löwe, D. Lüke, O. Mańczak, J. S. T. Ng, S. Nickel, D. Notz, K. Ohrenberg, M. Roco, M. Rohde, J. Roldán, U. Schneekloth, W. Schulz, F. Selonke, E. Stiliaris, B. Surrow, T. Voss, D. Westphal, G. Wolf, C. Youngman, J. F. Zhou, H. J. Grabosch, A. Kharchilava, A. Leich, M. Mattingly, A. Meyer, S. Schlenstedt, N. Wulff, G. Barbagli, P. Pelfer, G. Anzivino, G. Maccarrone, S. De Pasquale, L. Votano, A. Bamberger, S. Eisenhardt, A. Freidhof, S. Söldner-Rembold, J. Schroeder, T. Trefzger, N. H. Brook, P. J. Bussey, A. T. Doyle, J. I. Fleck, D. H. Saxon, M. L. Utley, A. S. Wilson, A. Dannemann, U. Holm, D. Horstmann, T. Neumann, R. Sinkus, K. Wick, E. Badura, B. D. Burow, L. Hagge, E. Lohrmann, J. Mainusch, J. Milewski, M. Nakahata, N. Pavel, G. Poelz, W. Schott, F. Zetsche, T. C. Bacon, I. Butterworth, E. Gallo, V. L. Harris, B. Y. H. Hung, K. R. Long, D. B. Miller, P. P. O. Morawitz, A. Prinias, J. K. Sedgbeer, A. F. Whitfield, U. Mallik, E. McCliment, M. Z. Wang, S. M. Wang, J. T. Wu, Y. Zhang, P. Cloth, D. Filges, S. H. An, S. M. Hong, S. W. Nam, S. K. Park, M. H. Suh, S. H. Yon, R. Imlay, S. Kartik, H.-J. Kim, R. R. McNeil, W. Metcalf, V. K. Nadendla, F. Barreiro, G. Cases, R. Graciani, J. M. Hernández, L. Hervás, L. Labarga, J. del Peso, J. Puga, J. Terron, J. F. de Trocóniz, G. R. Smith, F. Corriveau, D. S. Hanna, J. Hartmann, L. W. Hung, J. N. Lim, C. G. Matthews, P. M. Patel, L. E. Sinclair, D. G. Stairs, M. St. Laurent, R. Ullmann, G. Zacek, V. Bashkirov, B. A. Dolgoshein, A. Stifutkin, G. L. Bashindzhagyan, P. F. Ermolov, L. K. Gladilin, Y. A. Golubkov, V. D. Kobrin, V. A. Kuzmin, A. S. Proskuryakov, A. A. Savin, L. M. Shcheglova, A. N. Solomin, N. P. Zotov, M. Botje, F. Chlebana, A. Dake, J. Engelen, M. de Kamps, P. Kooijman, A. Kruse, H. Tiecke, W. Verkerke, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg, D. Acosta, B. Bylsma, L. S. Durkin, K. Honscheid, C. Li, T. Y. Ling, K. W. McLean, W. N. Murray, I. H. Park, T. A. Romanowski, R. Seidlein, D. S. Bailey, G. A. Blair, A. Byrne, R. J. Cashmore, A. M. Cooper-Sarkar, D. Daniels, R. C. E. Devenish, N. Harnew, M. Lancaster, P. E. Luffman, L. Lindemann, J. D. McFall, C. Nath, V. A. Noyes, A. Quadt, H. Uijterwaal, R. Walczak, F. F. Wilson, T. Yip, G. Abbiendi, A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, J. Bulmahn, J. M. Butterworth, R. G. Feild, B. Y. Oh, J. J. Whitmore, G. D'Agostini, G. Marini, A. Nigro, E. Tassi, J. C. Hart, N. A. McCubbin, K. Prytz, T. P. Shah, T. L. Short, E. Barberis, T. Dubbs, C. Heusch, M. Van Hook, B. Hubbard, W. Lockman, J. T. Rahn, H. F.-W. Sadrozinski, A. Seiden, J. Biltzinger, O. Schwarzer, R. J. Seifert, A. H. Walenta, G. Zech, H. Abramowicz, G. Briskin, S. Dagan, A. Levy, T. Hasegawa, M. Hazumi, T. Ishii, M. Kuze, S. Mine, Y. Nagasawa, M. Nakao, I. Suzuki, K. Tokushuku, S. Yamada, Y. Yamazaki, M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura, Y. Nakamitsu, K. Yamauchi, R. Cirio, M. Costa, M. I. Ferrero, L. Lamberti, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano, M. Dardo, D. C. Bailey, D. Bandyopadhyay, F. Benard, M. Brkic, M. B. Crombie, D. M. Gingrich, G. F. Hartner, K. K. Joo, G. M. Levman, J. F. Martin, R. S. Orr, C. R. Sampson, R. J. Teuscher, C. D. Catterall, T. W. Jones, P. B. Kaziewicz, J. B. Lane, R. L. Saunders, J. Shulman, K. Blankenship, J. Kochocki, B. Lu, L. W. Mo, W. Bogusz, K. Charchuła, J. Ciborowski, J. Gajewski, G. Grzelak, M. Kasprzak, M. Krzyżanowski, K. Muchorowski, R. J. Nowak, J. M. Pawlak, T. Tymieniecka, A. K. Wróblewski, J. A. Zakrzewski, A. F. Żarnecki, M. Adamus, Y. Eisenberg, U. Karshon, D. Revel, D. Zer-Zion, I. Ali, W. F. Badgett, B. Behrens, S. Dasu, C. Fordham, C. Foudas, A. Goussiou, R. J. Loveless, D. D. Reeder, S. Silverstein, W. H. Smith, A. Vaiciulis, M. Wodarczyk, T. Tsurugai, S. Bhadra, M. L. Cardy, C.-P. Fagerstroem, W. R. Frisken, K. M. Furutani, M. Khakzad, and W.B. Schmidke
- Subjects
Quantum chromodynamics ,Physics ,Particle physics ,Neutral current ,010308 nuclear & particles physics ,Scattering ,Momentum transfer ,General Physics and Astronomy ,HERA ,Deep inelastic scattering ,01 natural sciences ,7. Clean energy ,Nuclear physics ,Cross section (physics) ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Boson - Abstract
Deep inelastic $e~-p$ scattering has been studied in both the charged-current (CC) and neutral-current (NC) reactions at momentum transfers squared, $Q~2$, between 400 GeV$~2$ and the kinematic limit of 87500 GeV$~2$ using the ZEUS detector at the HERA $ep$ collider. The CC and NC total cross sections, the NC to CC cross section ratio, and the differential cross sections, $ d\sigma/dQ~2 $, are presented. For $Q~2 \simeq M_W~2$, where $M_W$ is the mass of the $W$ boson, the CC and NC cross sections have comparable magnitudes, demonstrating the equal strengths of the weak and electromagnetic interactions at high $Q~2$. The $Q~2$ dependence of the CC cross section determines the mass term in the CC propagator to be $M_{W} = 76 \pm 16 \pm 13$GeV.
- Published
- 1995
36. Observation of hard scattering in photoproduction events with a large rapidity gap at HERA
- Author
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M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, J. Schlereth, R. Stanek, R.L. Talaga, J. Thron, F. Arzarello, R. Ayad, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, F. Ciralli, A. Contin, S. D'Auria, F. Frasconi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam, R. Nania, C. Nemoz, F. Palmonari, A. Polini, G. Sartorelli, R. Timellini, Y. Zamora Garcia, A. Zichichi, A. Bargende, J. Crittenden, K. Desch, B. Diekmann, T. Doeker, M. Eckert, L. Feld, A. Frey, M. Geerts, G. Geitz, M. Grothe, H. Hartmann, D. Haun, K. Heinloth, E. Hilger, H.-P. Jakob, U.F. Katz, S.M. Mari, A. Mass, S. Mengel, J. Mollen, E. Paul, Ch. Rembser, R. Schattevoy, D. Schramm, J. Stamm, R. Wedemeyer, S. Campbell-Robson, A. Cassidy, N. Dyce, B. Foster, S. George, R. Gilmore, G.P. Heath, H.F. Heath, T.J. Llewellyn, C.J.S. Morgado, D.J.P. Norman, J.A. O'Mara, R.J. Tapper, S.S. Wilson, R. Yoshida, R.R. Rau, M. Arneodo, L. Iannotti, M. Schioppa, G. Susinno, A. Bernstein, A. Caldwell, J.A. Parsons, S. Ritz, F. Sciulli, P.B. Straub, L. Wai, S. Yang, Q. Zhu, P. Borzemski, J. Chwastowski, A. Eskreys, K. Piotrzkowski, M. Zachara, L. Zawiejski, L. Adamczyk, B. Bednarek, K. Eskreys, K. Jeleń, D. Kisielewska, T. Kowalski, E. Rulikowska-Zarȩbska, L. Suszycki, J. Zaja̧c, A. Kotański, M. Przybycień, L.A.T. Bauerdick, U. Behrens, J.K. Bienlein, S. Böttcher, C. Coldewey, G. Drews, M. Flasiński, D.J. Gilkinson, P. Göttlicher, B. Gutjahr, T. Haas, W. Hain, D. Hasell, H. Heßling, H. Hultschig, Y. Iga, P. Joos, M. Kasemann, R. Klanner, W. Koch, L. Köpke, U. Kötz, H. Kowalski, W. Kröger, J. Krüger, J. Labs, A. Ladage, B. Löhr, M. Löwe, D. Lüke, O. Mańczak, J.S.T. Ng, S. Nickel, D. Notz, K. Ohrenberg, M. Roco, M. Rohde, J. Roldán, U. Schneekloth, W. Schulz, F. Selonke, E. Stiliaris, T. Voß, D. Westphal, G. Wolf, C. Youngman, H.J. Grabosch, A. Leich, A. Meyer, C. Rethfeldt, S. Schlenstedt, G. Barbagli, P. Pelfer, G. Anzivino, G. Maccarrone, S. De Pasquale, S. Qian, L. Votano, A. Bamberger, A. Freidhof, T. Poser, S. Söldner-Rembold, J. Schroeder, G. Theisen, T. Trefzger, N.H. Brook, P.J. Bussey, A.T. Doyle, I. Fleck, V.A. Jamieson, D.H. Saxon, M.L. Utley, A.S. Wilson, A. Dannemann, U. Holm, D. Horstmann, H. Kammerlocher, B. Krebs, T. Neumann, R. Sinkus, K. Wick, E. Badura, B.D. Burow, A. Fürtjes, L. Hagge, E. Lohrmann, J. Mainusch, J. Milewski, M. Nakahata, N. Pavel, G. Poelz, W. Schott, J. Terron, F. Zetsche, T.C. Bacon, R. Beuselinck, I. Butterworth, E. Gallo, V.L. Harris, B.H. Hung, K.R. Long, D.B. Miller, P.P.O. Morawitz, A. Prinias, J.K. Sedgbeer, A.F. Whitfield, U. Mallik, E. McCliment, M.Z. Wang, S.M. Wang, J.T. Wu, Y. Zhang, P. Cloth, D. Filges, S.H. An, S.M. Hong, S.W. Nam, S.K. Park, M.H. Suh, S.H. Yon, R. Imlay, S. Kartik, H.-J. Kim, R.R. McNeil, W. Metcalf, V.K. Nadendla, F. Barreiro, G. Cases, R. Graciani, J.M. Hernández, L. Hervás, L. Labarga, J. del Peso, J. Puga, J.F. de Trocóniz, G.R. Smith, F. Corriveau, D.S. Hanna, J. Hartmann, L.W. Hung, J.N. Lim, C.G. Matthews, P.M. Patel, L.E. Sinclair, D.G. Stairs, M.St. Laurent, R. Ullmann, G. Zacek, V. Bashkirov, B.A. Dolgoshein, A. Stifutkin, G.L. Bashindzhagyan, P.F. Ermolov, L.K. Gladilin, Y.A. Golubkov, V.D. Kobrin, V.A. Kuzmin, A.S. Proskuryakov, A.A. Savin, L.M. Shcheglova, A.N. Solomin, N.P. Zotov, S. Bentvelsen, M. Botje, F. Chlebana, A. Dake, J. Engelen, P. de Jong, M. de Kamps, P. Kooijman, A. Kruse, V. O'Dell, A. Tenner, H. Tiecke, W. Verkerke, M. Vreeswijk, L. Wiggers, E. de Wolf, R. van Woudenberg, D. Acosta, B. Bylsma, L.S. Durkin, K. Honscheid, C. Li, T.Y. Ling, K.W. McLean, W.N. Murray, I.H. Park, T.A. Romanowski, R. Seidlein, D.S. Bailey, G.A. Blair, A. Byrne, R.J. Cashmore, A.M. Cooper-Sarkar, D. Daniels, R.C.E. Devenish, N. Harnew, M. Lancaster, P.E. Luffman, L. Lindemann, J. McFall, C. Nath, A. Quadt, H. Uijterwaal, R. Walczak, F.F. Wilson, T. Yip, G. Abbiendi, A. Bertolin, R. Brugnera, R. Carlin, F. Dal Corso, M. De Giorgi, U. Dosselli, S. Limentani, M. Morandin, M. Posocco, L. Stanco, R. Stroili, C. Voci, J. Bulmahn, J.M. Butterworth, R.G. Feild, B.Y. Oh, J.J. Whitmore, G. D'Agostini, M. Iori, G. Marini, M. Mattioli, A. Nigro, E. Tassi, J.C. Hart, N.A. McCubbin, K. Prytz, T.P. Shah, T.L. Short, E. Barberis, N. Cartiglia, T. Dubbs, C. Heusch, M. Van Hook, B. Hubbard, W. Lockman, J.T. Rahn, H.F.-W. Sadrozinski, A. Seiden, J. Biltzinger, R.J. Seifert, A.H. Walenta, G. Zech, H. Abramowicz, G. Briskin, S. Dagan, A. Levy, T. Hasegawa, M. Hazumi, T. Ishii, M. Kuze, S. Mine, Y. Nagasawa, T. Nagira, M. Nakao, I. Suzuki, K. Tokushuku, S. Yamada, Y. Yamazaki, M. Chiba, R. Hamatsu, T. Hirose, K. Homma, S. Kitamura, S. Nagayama, Y. Nakamitsu, R. Cirio, M. Costa, M.I. Ferrero, L. Lamberti, S. Maselli, C. Peroni, R. Sacchi, A. Solano, A. Staiano, M. Dardo, D.C. Bailey, D. Bandyopadhyay, F. Benard, M. Brkic, M.B. Crombie, D.M. Gingrich, G.F. Hartner, K.K. Joo, G.M. Levman, J.F. Martin, R.S. Orr, C.R. Sampson, R.J. Teuscher, C.D. Catterall, T.W. Jones, P.B. Kaziewicz, J.B. Lane, R.L. Saunders, J. Shulman, K. Blankenship, J. Kochocki, B. Lu, L.W. Mo, W. Bogusz, K. Charchuła, J. Ciborowski, J. Gajewski, G. Grzelak, M. Kasprzak, M. Krzyżanowski, K. Muchorowski, R.J. Nowak, J.M. Pawlak, T. Tymieniecka, A.K. Wróblewski, J.A. Zakrzewski, A.F. Żarnecki, M. Adamus, Y. Eisenberg, C. Glasman, U. Karshon, D. Revel, A. Shapira, I. Ali, B. Behrens, S. Dasu, C. Fordham, C. Foudas, A. Goussiou, R.J. Loveless, D.D. Reeder, S. Silverstein, W.H. Smith, T. Tsurugai, S. Bhadra, W.R. Frisken, K.M. Furutani, and Zeus (IHEF, IoP, FNWI)
- Subjects
Nuclear and High Energy Physics ,Particle physics ,Photon ,Proton ,Astrophysics::High Energy Astrophysical Phenomena ,Hadron ,FOS: Physical sciences ,Astronomy & Astrophysics ,DIFFRACTION ,01 natural sciences ,High Energy Physics - Experiment ,Physics, Particles & Fields ,law.invention ,COLLIDER ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics ,DESIGN ,law ,0103 physical sciences ,Rapidity ,CALORIMETER ,Nuclear Experiment ,010306 general physics ,Collider ,DETECTOR ,Physics ,Research Groups and Centres\Physics\Low Temperature Physics ,Science & Technology ,ZEUS (particle detector) ,Faculty of Science\Physics ,hep-ex ,010308 nuclear & particles physics ,Scattering ,ZEUS ,diffractive scattering ,HERA ,photoproduction ,Nuclear & Particles Physics ,POMERON STRUCTURE ,Physics, Nuclear ,PHOTON ,Physical Sciences ,JETS ,High Energy Physics::Experiment - Abstract
Events with a large rapidity gap and total transverse energy greater than 5 GeV have been observed in quasi-real photoproduction at HERA with the ZEUS detector. The distribution of these events as a function of the $\gamma p$ centre of mass energy is consistent with diffractive scattering. For total transverse energies above 12 GeV, the hadronic final states show predominantly a two-jet structure with each jet having a transverse energy greater than 4 GeV. For the two-jet events, little energy flow is found outside the jets. This observation is consistent with the hard scattering of a quasi-real photon with a colourless object in the proton., Comment: 19 pages, latex, 4 figures appended as uuencoded file
- Published
- 1995
37. A search for heavy leptons at HERA
- Author
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Peter Robmann, S. Aid, P. E. Reimer, J. Duboc, B. Stella, G. Müller, E. M. Hanlon, Carl R. Brune, M. Barth, L. R. West, V. Korbel, K. Rüter, C. Niebuhr, R. D. Appuhn, H. Krehbiel, A. Gellrich, F. Lamarche, G. G. Winter, B. Gonzalez-Pineiro, Hermann Kolanoski, P. Steffen, D. Clarke, John A Coughlan, Horst Oberlack, K. Rosenbauer, M. Vecko, P. R. Newman, J. Riedlberger, D. Mercer, G. Buschhorn, S. M. Robertson, R. L. Lander, S. Levonian, S. Masson, M. Colombo, D. Goldner, Y. Soloviev, Mikhail Danilov, F. Charles, M. F. Hess, G. Villet, Pierre Marage, H. U. Martyn, Matthias Klein, G. Lindström, K. Stephens, E. Peppel, R. Roosen, C. Gruber, H. P. Wellisch, Max Weber, J. Turnau, T. Jansen, M. Steenbock, Murrough Landon, A. E. Wright, J. Martyniak, G. Thompson, E. Malinovski, M. Kuhlen, A. Courau, B. Andrieu, T. Carli, K. Flamm, Christophe Royon, R. Nisius, Benno List, A. Buniatian, K. C. Hoeger, C. A. Meyer, G. Grindhammer, G. Rädel, D. Lüke, E. Wünsch, B. Fominykh, P. I. P. Kalmus, M. Hampel, B. Kuznik, R. Kaschowitz, W. Hildesheim, Roland Horisberger, A. Valkárová, V. Riech, I. Sheviakov, D. Wegener, W.J. Haynes, Ph. Huet, S. Riess, A. Gruber, I. W. Walker, A. Braemer, K. Rybicki, H. Itterbeck, P. Van Mechelen, M. Hapke, D. Düllmann, H. Henschel, D. Kant, Ch. Pichler, P. Hill, J. Bán, H. J. Behrend, J.C. Bizot, Emmanuelle Perez, Christoph Grab, Kerstin Borras, A. Semenov, M. Goldberg, Peter Schacht, G. C. Lopez, O. Dünger, M. Korn, Winston Ko, Dave Sankey, G. Siegmon, Jean-Arcady Meyer, R. Nahnhauer, E. Barrelet, U. Krüger, F. Botterweck, K. Daum, C. Pascaud, P. Loch, R. Gerhards, G. Weber, U. Straumann, David Cussans, F. Moreau, J. Hladký, J. Martens, Daniel Johnson, Vincent Hedberg, Frank Raupach, G. Knies, Armen Vartapetian, J. D. Dowell, R. J. Ellison, R. Marshall, Guenter Eckerlin, G. Cozzika, Dirk Krücker, L. N. Shtarkov, G. D. Patel, André Schöning, F. Kole, S. Schiek, F. Eisele, A. Jacholkowska, P. Verrecchia, J. R. Smith, S. Dagoret, T. Köhler, M. W. Krasny, F. Linsel, A. Wegener, L. Goerlich, A. Panitch, Martin Erdmann, S. D. Kolya, E. A. De Wolf, Ch. Berger, V. Schröder, R. Herma, Karlheinz Meier, J. Heatherington, J. Haack, Stefan Valkar, U. Obrock, Wolfgang Lange, E. Eisenhandler, Gregorio Bernardi, F. Niebergall, K. H. Hiller, Eckhart Fretwurst, I. O. Skillicorn, H. H. Kaufmann, H. B. Dreis, Eckhard Elsen, F. Brasse, R. C. W. Henderson, D. Newton, J. Gayler, R. Maraček, Anton Babaev, V. Efremenko, J. Ferencei, Steve McMahon, C. Thiebaux, S. Eichenberger, V I. Shekelyan, A. Walther, N. Wulff, J. Tutas, J. D. Burger, R. Prosi, L. Büngener, Hannes Jung, W. von Schlippe, T. Merz, U. Krüner-Marquis, P. Lanius, C. Vallée, E. Sanchez, W. Zimmermann, I. Tichomirov, K. Wacker, R. Steinberg, I. Herynek, J. Baehr, N. Magnussen, S. Mikocki, David Schmidt, J. Strachota, Markus Seidel, V. Tchernyshov, S. Tapprogge, W.D. Dau, N. Sahlmann, E. Evrard, P. Kasselmann, E. Schuhmann, B. Schwab, K. Gabathuler, A. Lebedev, Grzegorz Nowak, S. Egli, J. B. Dainton, C. Jacobsson, P. Biddulph, M. Fleischer, K. Johanssen, M. A. Jabiol, Pavel Murin, H. Grässler, M. Rietz, D. Haidt, H. Hufnagel, J. Feltesse, U. Bassler, M. Ibbotson, G. Bertrand-Coremans, R. Starosta, Daniel Pitzl, J. Kurzhöfer, V. Nagovizin, U. Seehausen, R. Eichler, F. Sefkow, P. Ribarics, G. Heinzelmann, C.D. Hilton, L. Criegee, B. Delcourt, M. Höppner, R. Felst, J.G. Contreras, J. P. Kubenka, U. Kathage, U. Stösslein, H. Meyer, S. Kermiche, Laurent Favart, S. Prell, S. K. Kotelnikov, L. Hajduk, J. Formánek, M. Gebauer, C. Dollfus, J. Garvey, R. Buchholz, C. Leverenz, David Milstead, V. Brisson, G. W. Noyes, A. M. Fomenko, P. A. Smirnov, O. Hamon, H. Küster, H. Shooshtari, F. Rouse, P. Baranov, J. V. Morris, G. Schmidt, Didier Lacour, G. Pope, Peter Schleper, Ulrich Goerlach, Dusan Bruncko, M. Jaffre, J. E. Olsson, Marc Besancon, M. Forbush, A. Schwind, B. Naroska, F. Ferrarotto, A.S. Belousov, Sergey Rusakov, P. Truöl, H. Genzel, W. Bartel, T. Greenshaw, C. Schmidt, J.P. Phillips, J. P. Sutton, P. Di Nezza, Rosario Martín, P. Van Esch, Stephen Maxfield, A. Lindner, J. Janoth, A. Rostovtsev, Claus Kleinwort, J. Stiewe, F. W. Büsser, Volker Blobel, P. Goritchev, C. Keuker, W. Braunschweig, K. Gamerdinger, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, R. Sell, D. Neyret, T. Mavroidis, S. Kazarian, U. Siewert, F. Zomer, A. M. Goodall, L. Del Buono, V. Andreev, M. Zimmer, Vincent Boudry, Jean-Francois Laporte, H. Ehrlichmann, Yves Sirois, J. Lipinski, G. Franke, Zhen Zhang, J. Žáček, J. Ebert, J. M. Foster, S. Mani, H. P. Beck, Stephen Burke, A. Usik, M. Savitsky, K. Zuber, J. Cvach, H. Bergstein, Th. Naumann, H. Duhm, E. Gabathuler, E. Deffur, P. Kostka, Ch. Ley, M. David, S. Reinshagen, A. Wagener, H. K. Nguyen, I. V. Gorelov, K. Müller, R. Grässler, Ch. Coutures, W. Struczinski, M. Flieser, J. Stier, M. Arpagaus, Y. Vazdik, M. Nyberg-Werther, T. R. Ebert, A. Fedotov, Günter Flügge, T. P. Yiou, C. Kiesling, A. De Roeck, A. J. Campbell, Richard E. Taylor, T. Ahmed, Th. Wolff, T. Kurča, S. Willard, I. R. Kenyon, H. Spitzer, M. Winde, R. Bernet, P. Uelkes, L. Johnson, H. E. Roloff, Leif J. Jönsson, H. Lohmander, and D. Feeken
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Branching fraction ,Astrophysics::High Energy Astrophysical Phenomena ,Electron–positron annihilation ,High Energy Physics::Phenomenology ,HERA ,Massless particle ,Nuclear physics ,Particle decay ,W and Z bosons ,High Energy Physics::Experiment ,Neutrino ,Lepton - Abstract
A search for direct production of new leptons in the mass range from 10 GeV up to 225 GeV is presented by the H1 experiment at HERA. The data were obtained during 1993 and correspond to an integrated luminosity of 528 nb −1 . The search includes heavy lepton decays to final states e ( ν ) γ and e ( ν ) W , e ( ν ) Z with the subsequent decay of the W and Z bosons into jets or lepton pairs. No evidence was found for the production of new massive electrons or neutrinos in any of the decay channels. Rejection limits for excited electrons and neutrinos are derived.
- Published
- 1994
38. Inclusive charged particle cross sections in photoproduction at HERA
- Author
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T. Jansen, T. Ahmed, Th. Wolff, I. Tichomirov, G. Rädel, L. Criegee, H. Hufnagel, S. Kermiche, J. Formánek, R. D. Appuhn, M. Hampel, Ph. Huet, C.D. Hilton, M. Gebauer, J. Garvey, Ch. Pichler, A. M. Fomenko, I. R. Kenyon, K. Stephens, E. Peppel, M. Gennis, R. C. W. Henderson, S. Levonian, E. Malinovski, M. Kuhlen, H. Spitzer, P. Baranov, J. Tutas, J. D. Burger, Peter Schleper, G. Grindhammer, C. Bourdarios, R. Prosi, A. Buniatian, Marc Besancon, A.S. Belousov, Sergey Rusakov, P. Truöl, G. Lindström, C. Gruber, M. Nyberg, J. Harjes, S. M. Robertson, Dusan Bruncko, K. Flamm, D. Wegener, W.J. Haynes, A. Mavroidis, P. Goritchev, S. K. Kotelnikov, L. Hajduk, W. Flauger, D. Pitzl, R. Roosen, Mikhail Danilov, D. Lewin, Grzegorz Nowak, J. Martyniak, C. Jacobsson, B. Fominykh, Emmanuel Monnier, Eckhart Fretwurst, Fabian Zomer, B. Naroska, F. Ferrarotto, K. Gamerdinger, T. Köhler, M. W. Krasny, H. Genzel, J. Martens, P. I. P. Kalmus, Michel Devel, J. M. Foster, V. Efremenko, Peter Loch, D. Kant, P. Dingus, W. von Schlippe, K. Johannsen, Kerstin Borras, Didier Lacour, T. Merz, R. J. Ellison, G. Cozzika, J. Hladký, A. Braemer, T. Greenshaw, G. Siegmon, J. Feltesse, J. Ebert, F. Eisele, S. Mikocki, C. A. Meyer, J.P. Phillips, W. Pilgram, Christophe Royon, A. Semenov, K. C. Hoeger, J. Žáček, Steve McMahon, U. Kathage, M. Savitsky, A. Gruber, Peter Schacht, G. C. Lopez, J. Haack, H. Bergstein, Th. Naumann, F. Moreau, J. D. Dowell, A. Jacholkowska, Rosario Martín, J. Ferencei, Leith Godfrey, W. Schmitz, V. Brisson, S. Aid, F. Charles, R. Taylor, P. Van Esch, H. Greif, P. Robmann, P. Fuhrmann, N. Magnussen, M. Goldberg, Max Klein, V. Boudry, H. Duhm, E. Vogel, Gregorio Bernardi, C. Niebuhr, Anton Babaev, M. Rudowicz, J. Marks, S. D. Kolya, S. Mani, L. N. Shtarkov, C. Thiebaux, J. Strachota, Hannes Jung, Mario David, Claus Kleinwort, F. Brasse, J. Turnau, J. Cvach, L. Goerlich, A. Drescher, I. Abt, T. P. Yiou, Stephen Burke, L. R. West, U. Bassler, I.F. Fensome, Winston Ko, E. Gabathuler, E. Deffur, D. Feeken, D. Goldner, P. Kostka, Leif J. Jönsson, Guenter Eckerlin, R. Vick, R. Nisius, André Schöning, C. Vallée, M. Steenbock, A. Lindner, S. J. Maxfiedl, Y. Soloviev, I. Sheviakov, A. Usik, E. Barrelet, A. M. Goodall, Volker Blobel, Ch. Berger, R. Eichler, C. Keuker, H. Lohmander, P. A. Smirnov, U. Krüger, E. Evrard, W. Hildesheim, P. R. Newman, B. Andrieu, A. Gellrich, V. Riech, Karlheinz Meier, P. Ribarics, V. Andreev, G. Villet, R. Felst, Pierre Marage, L. Büngener, D. Mercer, F. Lamarche, B. Schwab, M. Eberle, W. Lange, S. Willard, Roland Bernet, J. R. Smith, J. E. Olsson, W. Bartel, I. W. Walker, R. Herma, Hermann Kolanoski, S. Dagoret, Pavel Murin, H. Grässler, J. Moreels, K. Rybicki, D. Clarke, A. Courau, M. Ibbotson, M. Vecko, T. R. Ebert, John A Coughlan, M. Winde, A. Leuschner, Christoph Grab, L. Johnson, H. Ehrlichmann, E. Eisenhandler, M. Hapke, S. Masson, R. Langkau, Horst Oberlack, F. W. Büsser, W. Braunschweig, A. Fedotov, Günter Flügge, B. Delcourt, R. Sell, S. Kazarian, U. Siewert, A. B. Clegg, Andrew Mehta, N. Gogitidze, Laurent Favart, C. Dollfus, S. Reinshagen, U. Stösslein, V I. Shekelyan, R. Haydar, F. Kole, N. Sahlmann, C. Kiesling, Armen Vartapetian, E. Schuhmann, A. De Roeck, P. C. Bosetti, C. Leverenz, K. Wacker, R. Steinberg, B. Stella, A. Rostovtsev, M. Arpagaus, P. Biddulph, R. Ebbinghaus, M. Zimmer, J. Lipinski, Jean-Francois Laporte, Ulrich Goerlach, L. Urban, G. Franke, M. A. Jabiol, B. Kuznik, T. Kurča, R. L. Lander, M. Ruffer, K. Rosenbauer, M. Flieser, S. Orenstein, G. Bertrand-Coremans, H. Bärwolff, S. Eichenberger, Frank Raupach, J. Stier, R. Kaschowitz, Y. Vazdik, Y. Sirois, Jean-Arcady Meyer, M. Jaffré, H. Meyer, N. Wulff, A. Valkárová, P. Kasselmann, G. Thompson, A. Wegner, M. Colombo, M. Fleischer, S. Riess, H. Ziaeepour, W.D. Dau, J. B. Dainton, J. Kurzhöfer, V. Nagovizin, D. Düllmann, Hans Peter Beck, R. Gerhards, P. Hill, A. W. E. Dann, J. P. Kubenka, H. Henschel, J. Bán, Ch. Ley, U. Seehausen, H. J. Behrend, J.C. Bizot, D. Lüers, Murrough Landon, N. Huot, G. W. Noyes, P. Verrecchia, A. E. Wright, K. Müller, P. E. Reimer, H. Shooshtari, V. Schröder, J. Riedlberger, H. H. Kaufmann, Eckhard Elsen, D. Neyret, Nicolas Ellis, Alan Campbell, E. M. Hanlon, H. Itterbeck, S. Peters, H. K. Nguyen, I. V. Gorelov, O. Hamon, G. G. Winter, R. Grässler, Ch. Coutures, W. Struczinski, Vincent Hedberg, G. Knies, P. Steffen, I. O. Skillicorn, H. B. Dreis, H. P. Wellisch, T. Carli, V. Korbel, F. Linsel, J. Heatherington, D. Newton, P. Lanius, V. Tchernyshov, M. Korn, G. Weber, U. Straumann, H. U. Martyn, F. Ould-Saada, M. Höppner, S. Prell, S. A. Murray, J. Chyla, Martin Erdmann, U. Obrock, F. Niebergall, J. Duboc, C. Schmidt, J. P. Sutton, P. Di Nezza, U. Braun, K. Rauschnabel, E. Binder, H.T. Phillips, M. Schulz, J. Gayler, E. Sanchez, L. Del Buono, O. Dünger, R. Marshall, Dirk Krücker, H. Krehbiel, G. Buschhorn, I. Herynek, L.A. Womersley, A. Walther, W. Zimmermann, J. V. Morris, M. Forbush, A. Schwind, C. Pascaud, A. Lebedev, S. Egli, M. Rietz, D. Haidt, G. Heinzelmann, S. Valkar, H. Küster, D. Lüke, C. Zeitnitz, Dave Sankey, G. D. Patel, W. Scobel, D.P. Johnson, and David Schmidt
- Subjects
Quantum chromodynamics ,Physics ,Nuclear and High Energy Physics ,Wire chamber ,Particle physics ,Elementary particle ,HERA ,Charged particle ,Nuclear physics ,Particle mass ,Pseudorapidity ,Transverse momentum ,High Energy Physics::Experiment ,Nuclear Experiment - Abstract
Cross sections are presented for the inclusive production of charged particles measured in electron-proton collisions at low Q 2 with the H1 detector at HERA. The transverse momentum distribution extends up to 8 GeV/ c . Its shape is found to be harder than that observed in p p collisions at comparable centre-of-mass energies √S γp ≈ √S p p ≈ 200 GeV , and also harder than in γp collisions at lower energies √ S γp ≈ 18 GeV. Results from quantum chromodynamics (QCD) calculations agree with the measured transverse momentum and pseudorapidity cross sections.
- Published
- 1994
39. First measurement of the charged current cross section at HERA
- Author
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T. Ahmed, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bán, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, H. Bergstein, G. Bernardi, R. Bernet, G. Bertrand-Coremans, M. Besançon, P. Biddulph, J.C. Bizot, V. Blobel, K. Borras, V. Boudry, A. Braemer, F. Brasse, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, D. Clarke, A.B. Clegg, M. Colombo, J.A. Coughlan, A. Courau, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, M. Danilov, A.W.E. Dann, W.D. Dau, K. Daum, M. David, E. Deffur, B. Delcourt, L. Del Buono, A. De Roeck, E. De Wolf, C. Dollfus, J.D. Dowell, H.B. Dreis, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, E. Evrard, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, W. Flauger, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gamerdinger, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, A.M. Goodall, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, G. Grindhammer, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, E.M. Hanlon, M. Hapke, W.J. Haynes, J. Heatherington, V. Hedberg, G. Heinzelmann, R.C.W. Henderson, H. Henschel, R. Herma, I. Herynek, W. Hildesheim, P. Hill, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, Ph. Huet, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, K. Johannsen, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, D. Kant, S. Kazarian, R. Kaschowitz, P. Kasselmann, U. Kathage, H.H. Kaufmann, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, H. Kolanoski, F. Kole, S.D. Kolya, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, M. Krüner-Marquis, J.P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, D. Lacour, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, P. Lanius, J.F. Laporte, A. Lebedev, C. Leverenz, S. Levonian, Ch. Ley, A. Lindner, G. Lindström, F. Linsel, J. Lipinski, P. Loch, H. Lohmander, G.C. Lopez, D. Lüers, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, P. Marage, R. Marshall, J. Martens, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, A. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, S. Mikocki, V. Milone, D. Milstead, F. Moreau, J.V. Morris, G. Müller, P. Murín, V. Nagovizin, B. Naroska, Th. Naumann, G. Nawrath, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, F. Niebergall, C. Niebuhr, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, H. Oberlack, U. Obrock, J.E. Olsson, A. Panitch, C. Pascaud, G.D. Patel, E. Peppel, E. Perez, J.P. Phillips, Ch. Pichler, D. Pitzl, G. Pope, S. Prell, R. Prosi, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, V. Riech, J. Riedlberger, S. Riess, M. Rietz, S.M. Robertson, P. Robmann, R. Roosen, K. Rosenbauer, A. Rostovtsev, C. Royon, K. Rüter, M. Ruffer, S. Rusakov, K. Rybicki, N. Sahlmann, E. Sanchez, D.P.C. Sankey, M. Savitsky, P. Schacht, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, A. Schöning, V. Schröder, M. Schulz, B. Schwab, A. Schwind, U. Seehausen, F. Sefkow, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, Y. Soloviev, H. Spitzer, P. Staroba, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, J. Strachota, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, R.E. Taylor, V. Tchernyshov, C. Thiebaux, G. Thompson, I. Tichomirov, P. Truöl, J. Turnau, J. Tutas, A. Usik, S. Valkar, A. Valkarova, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, M. Vecko, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, I.W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, S. Willard, M. Winde, G.-G. Winter, Th. Wolff, A.E. Wright, E. Wünsch, N. Wulff, T.P. Yiou, J. Žáček, Z. Zhang, M. Zimmer, W. Zimmermann, F. Zomer, and K. Zuber
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Nuclear Theory ,High Energy Physics::Phenomenology ,Hadron ,Propagator ,Elementary particle ,HERA ,Nuclear physics ,Cross section (physics) ,Transverse plane ,High Energy Physics::Experiment ,Nuclear Experiment ,Charged current - Abstract
The cross section of the charged current process e − p → v e + hadrons is measured at HERA for transverse momenta of the hadron system larger than 25 GeV. The size of the cross section exhibits the W propagator.
- Published
- 1994
40. A measurement of σtot(γp) at
- Author
-
Ada Solano, S. Limentani, M. Z. Wang, G.A. Blair, A. Seidman, Stan Bentvelsen, D. Haun, Giuseppe Iacobucci, S. Kartik, Francois Corriveau, A. Kotański, P. Morawitz, S. Kasai, A. Cassidy, M. Nakahata, Marco Schioppa, P. G. Pelfer, S.J.P. Smith, K. U. Pösnecker, J. Nash, U. Schneekloth, T. Neumann, T. Barillari, Y. Eisenberg, M. M. Mobayyen, R. Seidlein, A. Mass, Roberto Casalbuoni, S. Kitamura, P.F. Ermolov, H. F.W. Sadrozinski, A. Shapira, Fernando Barreiro, D. Monaldi, K. Heinloth, R. Casaccia, H. Müsch, P. Cloth, J. Kochocki, Mauro Morandin, Z. Jakubowski, Giuseppe Levi, I. Gialas, R. Imlay, Rosario Nania, S. De Jong, S. Magill, A. Prinias, K. Jelen, Ulf Behrens, Federico Cindolo, H. Kowalski, F. Ciralli, W. Koch, F. J. Sciulli, A. Hofmann, Tadeusz Kowalski, C.J.S. Morgado, A. Freidhof, Michele Arneodo, N.C. Roocroft, S. Kramarczyk, L. W. Hung, J. Engelen, G. Poelz, James Crittenden, A. Dannemann, G. Sartorelli, A Furtjes, F. Gasparini, A. A. Savin, J. F. Labs, L. Suszycki, A. Bargende, W. Dorth, F. Dal Corso, J. Straver, L. Hagge, N. Dyce, Tobias M. Haas, T. Hasegawa, A. Leich, A. Margotti, Roberto Carlin, Shoichi Yamada, R.C.E. Devenish, Debades Bandyopadhyay, D. Revel, A. A. Voronin, T. Ishii, B. Lisowski, T. J. Llewellyn, A. Stopczyński, C. Voci, Silvia Maselli, M. Momayezi, G. Laurenti, G. Barbagli, G. Cara Romeo, E. Tscheslog, S. Nagayama, R. Ayed, R. L. Talaga, S. Bhadra, F. Ikraiam, G. Cases, R. Yoshida, B.D. Burow, I. Butterworth, T. Kȩdzierski, Y. Iga, J. M. Pawlak, A. Vorvolakos, D. McQuillan, A. Zichichi, Matthias Kasemann, R. Timellini, A. Dake, D. Notz, C. Nemoz, K. Muchorowski, N. H. Brook, T.L. Short, R. R. McNeil, Ta Romanowski, Daniele Dominici, R. Wedemeyer, J.D. Prentice, E. Barberis, Samuel Silverstein, K. Charchuła, P. Erhard, Jens Hartmann, T. W. Jones, Anna Goussiou, M. Löwe, R. Loveless, U. Mallik, T. Khatri, J.W. Mitchell, Greg P Heath, L. Chen, Eduardo Ros, R. J. Cashmore, G. L. Bashindzhagyan, R. J. Teuscher, M. Geerts, K. Blankenship, Luis Labarga, J. J. Whitmore, M. Derrick, T. Tymieniecka, Danuta Kisielewska, C.R. Sampson, R. J. Seifert, P.M. Hallam-Baker, H. Dabbous, M. de Kamps, N. Pavel, G. Grzelak, J. F. Martin, P. Kooijman, F. F. Wilson, M. Chiarini, U. Kötz, Vivian O'Dell, H. J. Kim, T. C. Bacon, M. Lomperski, Stefano Maria Mari, R. Gläser, Guenter Wolf, A. Bernstein, Y. Zamora Garcia, A. Francescato, C. Youngman, Hideki Okuno, W. Burkot, R. J. Nowak, S. De Pasquale, J.K. Mayer, S. Schlenstedt, I. Laakso, M. Brkic, J. K. Bienlein, R. Szwed, D. Shaw, P. J. Bussey, S. Qian, G. D'Agostini, Ben Bylsma, B. Lu, J. Milewski, J. Krüger, J. F. de Trocóniz, M. Nuti, J. Schroeder, H. Chaves, Masashi Hazumi, L. Zawiejski, T. Y. Ling, P. de Jong, Q. Lin, Inkyu Park, F. Benard, G. Zech, S. De Curtis, H. Hartmann, Y. Nakamitsu, Katsuo Tokushuku, Giovanni Abbiendi, M.I. Ferrero, R. J. Tapper, Robert Klanner, M. Rohde, N. A. McCubbin, T. S. Yoon, K. Wick, B. Musgrave, I. Fleck, Thomas Trefzger, A.G. Tenner, H.-P. Jakob, H. van der Lugt, Umberto Dosselli, J.B. Lane, E. Paul, David Cussans, Janusz Chwastowski, K. Sugano, Rr Rau, R. Brugnera, L. S. Durkin, J. N. Lim, A. Contin, W. Weihs, D. J. Gilkinson, V. A. Kuzmin, D. C. Bailey, E. A. De Wolf, G. Jahnen, Claudia Glasman, Sridhara Dasu, M. De Giorgi, Halina Abramowicz, K. Stojda, W. Metcalf, F. Turkot, R. Stanek, U. Holm, S. Mengel, J. Mainusch, Gm Levman, B. Gutjahr, Luca Stanco, C. Markou, M. Adamus, G. Marini, B. Löhr, E. Badura, M. Kückes, Np Zotov, A.K. Wróblewski, A. Bamberger, C. Rethfeldt, W. Schott, F. Selonke, E. Hilger, T. Bienz, G. Bruni, S. D'Auria, P. Joos, Cd Catterall, R. Heifetz, F. Arzarello, M. Rost, A. Meyer, B. Foster, F. W. Bullock, Mariusz Flasiński, Luisa Cifarelli, M. Krzyżanowski, A. Byrne, Neville Harnew, J. Roldán, B. Schneider, M. Lancaster, D.D. Reeder, A. Montag, B. Diekmann, B.Y. Oh, E. Rulikowska-Zarȩbska, Krzysztof Piotrzkowski, J.A. Zakrzewski, C. A. Heusch, C. Raine, P. Nylander, J. Leslie, J. Del Peso, T. Watanabe, C. Li, Lucia Votano, E. Lohrmann, Kr Long, C. Fordham, G. Castellini, M. Zachara, H. Kreutzmann, L.E. Sinclair, J. C. Vermeulen, M. Mattioli, R. van Woudenberg, G. Theisen, U. Karshon, Lothar At Bauerdick, T. Woeniger, L. Lamberti, F.S. Chlebana, K.M. Furutani, M.B. Crombie, H. Uijterwaal, P.M. Patel, A.F. Żarnecki, W. Schulz, Luis Hervas, D. Boscherini, W.N. Murray, G. Anzivino, G. Susinno, M. Nakao, P. Borzemski, R. S. Orr, P. B. Straub, E.E. Ronat, B. Behrens, Nicolo Cartiglia, J. Ciborowski, R. Ullmann, S. Yang, V.A. Jamieson, M. Dardo, C. Coldewey, R.S. Gilmore, H.J. Grabosch, B. Krebs, F. Zetsche, J. L. Thron, D. Lüke, T. Poser, M. Bonori, Maurizio Basile, S. Nickel, L. Bellagamba, D. B. Miller, J. Gajewski, T. Massam, J. Biltzinger, A.H. Walenta, H. Hultschig, H. Kammerlocher, B. H. Wiik, John Hart, I. Ali, Wr Frisken, S. Ritz, D. S. Hanna, L.W. Wiggers, Masami Chiba, G. Maccarrone, Klaus Kurt Desch, C. Del Papa, I. McArthur, P. Bruni, Costas Foudas, L.W. Mo, Michele Guida, Jose Repond, W. H. Smith, A. Caldwell, G.G. Stairs, G. Gloth, Mário Costa, U. Contino, T. Tsurugai, E. McCliment, J.C. Giddings, D.M. Gingrich, A. Seiden, F. Frasconi, M. Przybycień, F. Palmonari, S.S. Wilson, D. Zer-Zion, A. T. Doyle, A.M. Khan, R. Schattevoy, G. Bari, J.-L. Schneider, W. Vogel, P. Luffman, K. Eskreys, T.P. Shah, D. H. Saxon, J.S.T. Ng, P. Göttlicher, B. Hubbard, M. Ptacek, Aharon Levy, J.R. Forbes, K.W. McLean, D. Krakauer, A. Ladage, S. Söldner-Rembold, M. Iori, A. Nigro, Y. Nagasawa, A. Dwuraźny, J. Mollen, H.F. Fawcett, E.N. Kuznetsov, O. Mańczak, G. F. Hartner, U. Camerini, A. M. Cooper-Sarkar, S. Dagan, R. Walczak, Yu. A. Golubkov, H. Tiecke, M. Posocco, Geoffrey Smith, Detlef Filges, D. K. Hasell, K. O'Shaughnessy, A. Kruse, J. Shulman, R. Salomon, Juan Terron, M. Kasprzak, P. Giusti, G. Drews, J. A. Parsons, W. Hain, K. Dierks, J. M. Butterworth, J. Zaja̧c, B. Nizioł, A. Eskreys, S. K. Park, Amedeo Staiano, Tachishige Hirose, M. Kuze, R. Hamatsu, J. Kulka, L. Wai, P.L. Makkar, R. Stroili, C. Peroni, M. Roco, G. Geitz, W. Kröger, Dg Stairs, J. Malos, and C. Fanin
- Subjects
Physics ,Nuclear and High Energy Physics ,ZEUS (particle detector) ,Photon ,High Energy Physics::Phenomenology ,Nuclear Theory ,Detector ,Virtual particle ,HERA ,Particle detector ,Particle scattering ,Nuclear physics ,Cross section (physics) ,High Energy Physics::Experiment ,Nuclear Experiment - Abstract
The total photoproduction cross section is determined from a measurement of electroproduction with the ZEUS detector at HERA. The Q2 values of the virtual photons are in the range 10−7
- Published
- 1992
41. Measurement of the asymmetry ofb quark production ine + e − annihilation at $$\sqrt s = 35 GeV$$
- Author
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M. Takashima, Fernando Barreiro, J. M. Pawlak, G. Poelz, Eduardo Ros, E.E. Ronat, D. M. Binnie, R. J. Cashmore, A. Ladage, D. Trines, D. Revel, R. Wedemeyer, Philip Burrows, Jens Hartmann, H. U. Martyn, A. Montag, J. Krüger, Hermann Kolanoski, J. Del Peso, H. Hartmann, J. Shulman, Janusz Chwastowski, Guenter Wolf, A. Watson, E. Lohrmann, D. H. Saxon, B. Löhr, D. Muller, P. Joos, D. Notz, K. U. Pösnecker, M. E. Veitch, D. Su, B. Foster, D. Strom, Y. Eisenberg, Wolfram Dietrich Zeuner, F. J. Kirschfink, E. Hilger, R. Walczak, Ian R Tomalin, P. Mättig, M. Holder, W. Braunschweig, H. M. Fischer, H. Hultschig, A. J. Martin, John Hart, N. Wainer, Sau Lan Wu, Georg Zobernig, E. Bernardi, D. Lüke, S. Ritz, Stephanie Brandt, G. Cases, H. Kowalski, A. Eskreys, U. Karshon, Luis Hervas, A. Jocksch, K. Genser, M. G. Bowler, A. Caldwell, John Hassard, and R. Gerhards
- Subjects
Coupling constant ,Quark ,Physics ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,media_common.quotation_subject ,Asymmetry ,Standard Model ,Nuclear physics ,Production (computer science) ,Engineering (miscellaneous) ,Pseudovector ,media_common ,Bar (unit) - Abstract
The forward-backward asymmetry in the reaction e+e-→bb has been determined at centre of mass energies near 35 GeV using the TASSO detector. We report results from three different methods. The combined result of the measurements is\(\overline A _b = - 0.21 \pm 0.08\) ignoring\(B^0 \bar B^0 \) mixing. Taking mixing into account leads to a corrected asymmetry of\(\overline {A_b^{cor} } = - 0.28 \pm 0.11\). The axial vector coupling constant of theb quark as calculated from the corrected asymmetry isab=−1.2±0.5 to be compared with the valueabSM=−1 from the standard model.
- Published
- 1990
42. Experimental study of the orientation of three-jet events ine + e ? annihilation at PETRA
- Author
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D. Strom, R. Gerhards, E. Lohrmann, G. Yekutieli, H. Kowalski, A. Leites, K. Genser, Philip Burrows, T. Kracht, E.E. Ronat, M. G. Bowler, J. Körner, Stephanie Brandt, Jens Hartmann, K. U. Pösnecker, K. Gather, A. Ladage, Guenter Wolf, Wolfram Dietrich Zeuner, B. Löhr, H. M. Fischer, H. U. Martyn, G. Mikenberg, E. Hilger, A. J. Martin, P. Joos, B. Foster, Y. Eisenberg, R. Walczak, A. Jocksch, J. M. Pawlak, W. Braunschweig, D. Su, Fernando Barreiro, M. E. Veitch, J. Krüger, A. Shapira, M. Holder, Eduardo Ros, H. Hartmann, D. Revel, R. J. Cashmore, G. Cases, D. Muller, R. Wedemeyer, H. Hultschig, N. Wainer, John Hart, D. Lüke, S. Ritz, A. Montag, Sau Lan Wu, E. Bernardi, Janusz Chwastowski, J. Del Peso, A. Watson, G. Poelz, D. Notz, D. H. Saxon, Ian R Tomalin, P. Mättig, F. J. Kirschfink, M. Takashima, D. Trines, Hermann Kolanoski, J. Shulman, A. Eskreys, L. Labarga, A. Caldwell, John Hassard, U. Karshon, Luis Hervas, and Georg Zobernig
- Subjects
Quantum chromodynamics ,Physics ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,Hadron ,Elementary particle ,Jet (particle physics) ,Nuclear physics ,Azimuth ,High Energy Physics::Experiment ,Polar coordinate system ,Engineering (miscellaneous) ,Lepton - Abstract
The full TASSO data have been used to study the orientation of three-jet events ine+e− annihilation. The polar angle distributions of the normal to the three-jet plane as well as the polar angle distribution of the most energetic jet have been measured as a function of the thrust cut-off used to select the three-jet sample. The data corrected for radiation and detector effects are compared to QCD predictions and fair agreement is found. As a consistency check we also present measurements of the azimuthal correlations between the lepton and hadron planes. A significant azimuthal dependence is found, consistent again with the QCD predictions.
- Published
- 1990
43. Test of the Zeus forward calorimeter prototype
- Author
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P.M. Kooijman, J. Lehmann, J. Straver, F. Selonke, K. Dierks, C. Youngman, Ulf Behrens, J. Krüger, R. Hamatsu, U. Holm, B. Frisken, M. Rohde, O. Köll, M. A. Garcia, M. Wülker, J. F. Trocóniz, Jonathan W. Martin, D. Hasell, G. Drews, Eduardo Ros, David Hanna, U. Kötz, T. Hasegawa, H.G.J.M. Tiecke, P. Neelin, M. Krämer, D. Lüke, K. Wick, W. Vogel, James Crittenden, Geoffrey Smith, Robert Klanner, G.G. Stairs, T. Tsurugai, G. Levman, and J.J. Engelen
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Muon ,ZEUS (particle detector) ,Calorimeter (particle physics) ,Hadron ,Electron ,Noise (electronics) ,Nuclear physics ,Momentum ,Calibration ,High Energy Physics::Experiment ,Instrumentation - Abstract
Four prototype modules following the same design as the ZEUS forward calorimeter (FCAL) modules have been constructed and tested with electrons, hadrons and muons in the momentum range of 1 to 100 GeV/ c . The main topics under investigation were: calibration, uniformity of response, noise, light yield, energy resolution and the electron to hadron response (e/h ratio). The result of the measurements is presented and the expected performance of the FCAL is discussed in the light of these results.
- Published
- 1990
44. Search for neutral Higgs bosons from supersymmetry in Z decays
- Author
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D. Decamp, B. Deschizeaux, J.-P. Lees, M.-N. Minard, J.M. Crespo, M. Delfino, E. Fernandez, M. Martinez, R. Miquel, Ll.M. Mir, S. Orteu, A. Pacheco, J.A. Perlas, E. Tubau, M.G. Catanesi, M. De Palma, A. Farilla, G. Iaselli, G. Maggi, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, H. Hu, D. Huang, J. Lin, T. Ruan, T. Wang, W. Wu, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, W.B. Atwood, F. Bird, E. Blucher, T.H. Burnett, T. Charity, H. Drevermann, Ll. Garrido, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Lüke, A. Marchioro, P. Mato, J. May, A. Minten, A. Miotto, P. Palazzi, M. Pepe-Altarelli, F. Ranjard, A. Roth, J. Rothberg, H. Rotscheidt, W. von Rüden, R. St.Denis, D. Schlatter, M. Takashima, M. Talby, H. Taureg, W. Tejessy, H. Wachsmuth, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, J-C. Montret, D. Pallin, P. Perret, J. Proriol, F. Prulhière, J.D. Hansen, J.R. Hansen, P.H. Hansen, R. Møllerud, G. Petersen, E. Simopoulou, A. Vayaki, J. Badier, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J.C. Brient, M.A. Ciocci, G. Fouque, R. Guirlet, A. Rougé, M. Rumpf, R. Tanaka, H. Videau, I. Videau, D.J. Candlin, A. Conti, G. Parrini, M. Corden, C. Georgiopoulos, J.H. Goldman, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, G. Stimpfl, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. De Ninno, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G.P. Murtas, G. Nicoletti, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A.W. Halley, I. Ten Have, J.L. Hearns, I.S. Hughes, J.G. Lynch, W.T. Morton, C. Raine, J.M. Scarr, K. Smith, A.S. Thompson, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E.E. Kluge, Y. Maumary, M. Panter, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A.T. Belk, R. Beuselinck, D.M. Binnie, W. Cameron, M. Cattaneo, P.J. Dornan, S. Dugeay, R.W. Forty, A.M. Greene, J.F. Hassard, S.J. Patton, J.K. Sedgbeer, G. Taylor, I.R. Tomalin, A.G. Wright, P. Girtler, D. Kuhn, G. Rudolph, C.K. Bowdery, T.J. Brodbeck, A.J. Finch, F. Foster, G. Hughes, N.R. Keemer, M. Nuttall, B.S. Rowlingson, T. Sloan, S.W. Snow, T. Barczewski, L.A.T. Bauerdick, K. Kleinknecht, B. Renk, S. Roehn, H.-G. Sander, M. Schmelling, F. Steeg, J.-P. Albanese, J.-J. Aubert, C. Benchouk, A. Bonissent, D. Courvoisier, F. Etienne, E. Matsinos, S. Papalexiou, P. Payre, B. Pietrzyk, Z. Qian, W. Blum, P. Cattaneo, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, D. Hauff, A. Jahn, E. Lange, G. Lütjens, G. Lutz, W. Männer, H.-G. Moser, Y. Pan, R. Richter, A.S. Schwarz, R. Settles, U. Stiegler, U. Stierlin, J. Thomas, G. Waltermann, V. Bertin, G. De Bouard, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, G. Ganis, J.-F. Grivaz, Ph. Heusse, P. Janot, V. Journé, D.W. Kim, J. Lefrançois, A.-M. Lutz, J.-J. Veillet, F. Zomer, S.R. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, I. Ferrante, F. Fidecaro, L. Foà, E. Focardi, F. Forti, A. Giassi, M.A. Giorgi, F. Ligabue, A. Lusiani, E.B. Mannelli, P.S. Marrocchesi, A. Messineo, F. Palla, G. Sanguinetti, S. Scapellato, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, J.M. Carter, M.G. Green, P.V. March, T. Medcalf, M.R. Saich, J.A. Strong, R.M. Thomas, T. Wildish, D.R. Botterill, R.W. Clifft, T.R. Edgecock, M. Edwards, S.M. Fisher, J. Harvey, T.J. Jones, P.R. Norton, D.P. Salmon, J.C. Thompson, E. Aubourg, B. Bloch-Devaux, P. Colas, C. Klopfenstein, E. Lançon, E. Locci, S. Loucatos, L. Mirabito, E. Monnier, P. Perez, F. Perrier, J. Rander, J.-F. Renardy, A. Roussarie, J.-P. Schuller, J.G. Ashman, C.N. Booth, F. Combley, M. Dinsdale, J. Martin, D. Parker, L.F. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, E. Neugebauer, U. Schäfer, H. Seywerd, B. Gobbo, F. Liello, E. Milotti, F. Ragusa, L. Rolandi, L. Bellantoni, J.F. Boudreau, D. Cinabro, J.S. Conway, D.F. Cowen, Z. Feng, J.L. Harton, J. Hilgart, R.C. Jared, R.P. Johnson, B.W. Leclaire, Y.B. Pan, T. Parker, J.R. Pater, Y. Saadi, V. Sharma, J.A. Wear, F.V. Weber, null Sau Lan Wu, S.T. Xue, G. Zobernig, Decamp, D, Deschizeaux, B, Lees, Jp, Minard, Mn, Crespo, Jm, Delfino, M, Fernandez, E, Martinez, M, Miquel, R, Mir, Lm, Orteu, S, Pacheco, A, Perlas, Ja, Tubau, E, Catanesi, Mg, Depalma, M, Farilla, A, Iaselli, G, Maggi, G, Natali, S, Nuzzo, S, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Hu, H, Huang, D, Lin, J, Ruan, T, Wang, T, Wu, W, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Albrecht, H, Atwood, Wb, Bird, F, Blucher, E, Burnett, Th, Charity, T, Drevermann, H, Garrido, L, Grab, C, Hagelberg, R, Haywood, S, Jost, B, Kasemann, M, Kellner, G, Knobloch, J, Lacourt, A, Lehraus, I, Lohse, T, Luke, D, Marchioro, A, Mato, P, May, J, Minten, A, Miotto, A, Palazzi, P, Pepealtarelli, M, Ranjard, F, Roth, A, Rothberg, J, Rotscheidt, H, Vonruden, W, Stdenis, R, Schlatter, D, Takashima, M, Talby, M, Taureg, H, Tejessy, W, Wachsmuth, H, Wheeler, S, Wiedenmann, W, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadinotwinowska, M, Falvard, A, Gay, P, Henrard, P, Jousset, J, Michel, B, Montret, Jc, Pallin, D, Perret, P, Proriol, J, Prulhiere, F, Hansen, Jd, Hansen, Jr, Hansen, Ph, Mollerud, R, Petersen, G, Simopoulou, E, Vayaki, A, Badier, J, Blondel, A, Bonneaud, G, Bourotte, J, Braems, F, Brient, Jc, Ciocci, Ma, Fouque, G, Guirlet, R, Rouge, A, Rumpf, M, Tanaka, R, Videau, H, Videau, I, Candlin, Dj, Conti, A, Parrini, G, Corden, M, Georgiopoulos, C, Goldman, Jh, Ikeda, M, Lannutti, J, Levinthal, D, Mermikides, M, Sawyer, L, Stimpfl, G, Antonelli, A, Baldini, R, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Chiarella, V, Deninno, G, Dettorrepiazzoli, B, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, Gp, Nicoletti, G, Picchi, P, Zografou, P, Altoon, B, Boyle, O, Halley, Aw, Tenhave, I, Hearns, Jl, Hughes, I, Lynch, Jg, Morton, Wt, Raine, C, Scarr, Jm, Smith, K, Thompson, A, Brandl, B, Braun, O, Geiges, R, Geweniger, C, Hanke, P, Hepp, V, Kluge, Ee, Maumary, Y, Panter, M, Putzer, A, Rensch, B, Stahl, A, Tittel, K, Wunsch, M, Belk, At, Beuselinck, R, Binnie, Dm, Cameron, W, Cattaneo, M, Dornan, Pj, Dugeay, S, Forty, Rw, Greene, Am, Hassard, Jf, Patton, Sj, Sedgbeer, Jk, Taylor, G, Tomalin, Ir, Wright, Ag, Girtler, P, Kuhn, D, Rudolph, G, Bowdery, Ck, Brodbeck, Tj, Finch, Aj, Foster, F, Hughes, G, Keemer, Nr, Nuttall, M, Rowlingson, B, Sloan, T, Snow, Sw, Barczewski, T, Bauerdick, Lat, Kleinknecht, K, Renk, B, Roehn, S, Sander, Hg, Schmelling, M, Steeg, F, Albanese, Jp, Aubert, Jj, Benchouk, C, Bonissent, A, Courvoisier, D, Etienne, F, Matsinos, E, Papalexiou, S, Payre, P, Pietrzyk, B, Qian, Z, Blum, W, Cattaneo, P, Cowan, G, Dehning, B, Dietl, H, Fernandezbosman, M, Hauff, D, Jahn, A, Lange, E, Lutjens, G, Lutz, G, Manner, W, Moser, Hg, Pan, Y, Richter, R, Schwarz, A, Settles, R, Stiegler, U, Stierlin, U, Thomas, J, Waltermann, G, Bertin, V, Debouard, G, Boucrot, J, Callot, O, Chen, X, Cordier, A, Davier, M, Ganis, G, Grivaz, Jf, Heusse, P, Janot, P, Journe, V, Kim, Dw, Lefrancois, J, Lutz, Am, Veillet, Jj, Zomer, F, Amendolia, Sr, Bagliesi, G, Batignani, G, Bosisio, L, Bottigli, U, Bradaschia, C, Ferrante, I, Fidecaro, F, Foa, L, Focardi, E, Forti, F, Giassi, A, Giorgi, Ma, Ligabue, Franco, Lusiani, Alberto, Mannelli, Eb, Marrocchesi, P, Messineo, A, Palla, F, Sanguinetti, G, Scapellato, S, Steinberger, J, Tenchini, R, Tonelli, G, Triggiani, G, Carter, Jm, Green, Mg, March, Pv, Medcalf, T, Saich, Mr, Strong, Ja, Thomas, Rm, Wildish, T, Botterill, Dr, Clifft, Rw, Edgecock, Tr, Edwards, M, Fisher, Sm, Harvey, J, Jones, Tj, Norton, Pr, Salmon, Dp, Thompson, Jc, Aubourg, E, Blochdevaux, B, Colas, P, Klopfenstein, C, Lancon, E, Locci, E, Loucatos, S, Mirabito, L, Monnier, E, Perez, P, Perrier, F, Rander, J, Renardy, Jf, Roussarie, A, Schuller, Jp, Ashman, Jg, Booth, Cn, Combley, F, Dinsdale, M, Martin, J, Parker, D, Thompson, Lf, Brandt, S, Burkhardt, H, Grupen, C, Meinhard, H, Neugebauer, E, Schafer, U, Seywerd, H, Gobbo, B, Liello, F, Milotti, E, Ragusa, F, Rolandi, Luigi, Bellantoni, L, Boudreau, Jf, Cinabro, D, Conway, J, Cowen, Df, Feng, Z, Harton, Jl, Hilgart, J, Jared, Rc, Johnson, Rp, Leclaire, Bw, Pan, Yb, Parker, T, Pater, Jr, Saadi, Y, Sharma, V, Wear, Ja, Weber, Fv, Wu, Sl, Xue, St, and Zobernig, G.
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics::Phenomenology ,Elementary particle ,Supersymmetry ,lcsh:QC1-999 ,Standard Model ,Pseudoscalar ,symbols.namesake ,Higgs boson ,symbols ,High Energy Physics::Experiment ,Higgs mechanism ,Particle Physics - Experiment ,lcsh:Physics ,Minimal Supersymmetric Standard Model ,Boson - Abstract
The light scalar Higgs boson h and the pseudoscalar Higgs boson A of the minimal supersymmetric standard model have been searched for in the processes e+e−→hff and e+e−→hA using data collected by ALEPH at the LEP e+e− collider, with center of mass energies at and near the Z peak. Using a variety of signatures adapted to various mass ranges for h and A, we have excluded a large domain in the parameter space. For large values of ν2ν1, the ratio of the vacuum expectation values of the two Higgs fields, the whole range from 0 to 38.8 GeV is excluded for Mh and MA at 95% CL.
- Published
- 1990
45. Search for supersymmetric particles using acoplanar charged-particle pairs from Z0 decays
- Author
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D. Decamp, B. Deschizeaux, J.-P. Lees, M.-N. Minard, J.M. Crespo, M. Delfino, E. Fernandez, M. Martinez, R. Miquel, Ll.M. Mir, S. Orteu, A. Pacheco, J.A. Perlas, E. Tubau, M.G. Catanesi, M. De Palma, A. Farilla, G. Iaselli, G. Maggi, A. Mastrogiacomo, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chen, H. Hu, D. Huang, J. Lin, T. Ruan, T. Wang, W. Wu, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, F. Bird, E. Blucher, T. Charity, H. Drevermann, Ll. Garrido, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Lüke, A. Marchioro, P. Mato, J. May, V. Mertens, A. Minten, A. Miotto, P. Palazzi, M. Pepe-Altarelli, F. Ranjard, J. Richstein, A. Roth, J. Rothberg, H. Rotscheidt, W. Von Rüden, R.St. Denis, D. Schlatter, M. Takashima, M. Talby, H. Taureg, W. Tejessy, H. Wachsmuth, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, J-C. Montret, D. Pallin, P. Perret, J. Prat, J. Proriol, F. Prulhière, H. Bertelsen, F. Hansen, J.D. Hansen, J.R. Hansen, P.H. Hansen, A. Lindahl, B. Madsen, R. Møllerud, B.S. Nilsson, G. Petersen, E. Simopoulou, A. Vayaki, J. Badier, D. Bernard, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J.C. Brient, M.A. Ciocci, G. Fouque, R. Guirlet, P. Miné, A. Rougé, M. Rumpf, H. Videau, I. Videau, D. Zwierski, D.J. Candlin, A. Conti, G. Parrini, M. Corden, C. Georgiopoulos, J.H. Goldman, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. De Ninno, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G.P. Murtas, G. Nicoletti, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A.J. Flavell, A.W. Halley, I. Ten Have, J.L. Hearns, I.S. Hughes, J.G. Lynch, D.J. Martin, R. O'Neill, C. Raine, J.M. Scarr, K. Smith, A.S. Thompson, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E.E. Kluge, Y. Maumary, M. Panter, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A.T. Belk, R. Beuselinck, D.M. Binnie, W. Cameron, M. Cattaneo, P.J. Dornan, A.M. Greene, S. Dugeay, R.W. Forty, J.F. Hassard, S. Patton, J.K. Sedgbeer, G. Taylor, I.R. Tomalin, A.G. Wright, P. Girtler, D. Kuhn, G. Rudolph, C.K. Bowdery, T.J. Brodbeck, A.J. Finch, F. Foster, G. Hughes, N.R. Keemer, M. Nuttall, B.S. Rowlingson, T. Sloan, S.W. Snow, T. Barczewski, L.A.T. Bauerdick, K. Kleinknecht, B. Renk, S. Roehn, H.-G. Sander, M. Schmelling, F. Steeg, J.-P. Albanese, J.-J. Aubert, C. Benchouk, A. Bonissent, F. Etienne, R. Nacasch, P. Payre, B. Pietrzyk, Z. Qian, W. Blum, P. Cattaneo, M. Comin, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, D. Hauff, A. Jahn, E. Lange, G. Lütjens, G. Lutz, W. Männer, H.-G. Moser, Y. Pan, R. Richter, A.S. Schwarz, R. Settles, U. Stiegler, U. Stierlin, G. Stimpfl, J. Thomas, G. Waltermann, G. De Bouard, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, G. Ganis, J.-F. Grivaz, Ph. Heusse, P. Janot, V. Journé, D.W. Kim, J. Lefrançois, D. Lloyd-Owen, A.-M. Lutz, P. Marotte, J.-J. Veillet, S.R. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, I. Ferrante, F. Fidecaro, L. Foà, E. Focardi, F. Forti, A. Giassi, M.A. Giorgi, F. Ligabue, A. Lusiani, E.B. Mannelli, P.S. Marrocchesi, A. Messineo, F. Palla, G. Sanguinetti, S. Scapellato, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, J.M. Carter, B.J. Green, M.G. Green, A.K. McKemey, P.V. March, T. Medcalf, M.R. Saich, J.A. Strong, R.M. Thomas, T. Wildish, D.R. Botterill, R.W. Clifft, T.R. Edgecock, M. Edwards, S.M. Fisher, J. Harvey, D.L. Hill, T.J. Jones, M. Morrissey, P.R. Norton, D.P. Salmon, J.C. Thompson, B. Bloch-Devaux, P. Colas, C. Klopfenstein, E. Lançon, E. Locci, S. Loucatos, L. Mirabito, E. Monnier, P. Perez, F. Perrier, J. Rander, J.-F. Renardy, A. Roussarie, J.-P. Schuller, J.G. Ashman, C.N. Booth, F. Combley, M. Dinsdale, J. Martin, D. Parker, L.F. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, E. Neugebauer, U. Schäfer, H. Seywerd, K. Stupperich, B. Gobbo, F. Liello, E. Milotti, F. Ragusa, L. Rolandi, L. Bellantoni, J.F. Boudreau, D. Cinabro, J.S. Conway, D.F. Cowen, Z. Feng, J.L. Harton, J. Hilgart, R.C. Jared, R.P. Johnson, B.W. Leclaire, Y.B. Pan, T. Parker, J.R. Pater, Y. Saadi, V. Sharma, J.A. Wear, F.V. Weber, Sau Lan Wu, S.T. Xue, G. Zobernig, Decamp, D, Deschizeaux, B, Lees, Jp, Minard, Mn, Crespo, Jm, Delfino, M, Fernandez, E, Martinez, M, Miquel, R, Mir, Lm, Orteu, S, Pacheco, A, Perlas, Ja, Tubau, E, Catanesi, Mg, Depalma, M, Farilla, A, Iaselli, G, Maggi, G, Mastrogiacomo, A, Natali, S, Nuzzo, S, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Chen, Y, Hu, H, Huang, D, Lin, J, Ruan, T, Wang, T, Wu, W, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Albrecht, H, Bird, F, Blucher, E, Charity, T, Drevermann, H, Garrido, L, Grab, C, Hagelberg, R, Haywood, S, Jost, B, Kasemann, M, Kellner, G, Knobloch, J, Lacourt, A, Lehraus, I, Lohse, T, Luke, D, Marchioro, A, Mato, P, May, J, Mertens, V, Minten, A, Miotto, A, Palazzi, P, Pepealtarelli, M, Ranjard, F, Richstein, J, Roth, A, Rothberg, J, Rotscheidt, H, Vonruden, W, Stdenis, R, Schlatter, D, Takashima, M, Talby, M, Taureg, H, Tejessy, W, Wachsmuth, H, Wheeler, S, Wiedenmann, W, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadinotwinowska, M, Falvard, A, Gay, P, Henrard, P, Jousset, J, Michel, B, Montret, Jc, Pallin, D, Perret, P, Prat, J, Proriol, J, Prulhiere, F, Bertelsen, H, Hansen, F, Hansen, Jd, Hansen, Jr, Hansen, Ph, Lindahl, A, Madsen, B, Mollerud, R, Nilsson, B, Petersen, G, Simopoulou, E, Vayaki, A, Badier, J, Bernard, D, Blondel, A, Bonneaud, G, Bourotte, J, Braems, F, Brient, Jc, Ciocci, Ma, Fouque, G, Guirlet, R, Mine, P, Rouge, A, Rumpf, M, Videau, H, Videau, I, Zwierski, D, Candlin, Dj, Conti, A, Parrini, G, Corden, M, Georgiopoulos, C, Goldman, Jh, Ikeda, M, Lannutti, J, Levinthal, D, Mermikides, M, Sawyer, L, Antonelli, A, Baldini, R, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Chiarella, V, Deninno, G, Dettorrepiazzoli, B, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, Gp, Nicoletti, G, Picchi, P, Zografou, P, Altoon, B, Boyle, O, Flavell, Aj, Halley, Aw, Tenhave, I, Hearns, Jl, Hughes, I, Lynch, Jg, Martin, Dj, Oneill, R, Raine, C, Scarr, Jm, Smith, K, Thompson, A, Brandl, B, Braun, O, Geiges, R, Geweniger, C, Hanke, P, Hepp, V, Kluge, Ee, Maumary, Y, Panter, M, Putzer, A, Rensch, B, Stahl, A, Tittel, K, Wunsch, M, Belk, At, Beuselinck, R, Binnie, Dm, Cameron, W, Cattaneo, M, Dornan, Pj, Greene, Am, Dugeay, S, Forty, Rw, Hassard, Jf, Patton, S, Sedgbeer, Jk, Taylor, G, Tomalin, Ir, Wright, Ag, Girtler, P, Kuhn, D, Rudolph, G, Bowdery, Ck, Brodbeck, Tj, Finch, Aj, Foster, F, Hughes, G, Keemer, Nr, Nuttall, M, Rowlingson, B, Sloan, T, Snow, Sw, Barczewski, T, Bauerdick, Lat, Kleinknecht, K, Renk, B, Roehn, S, Sander, Hg, Schmelling, M, Steeg, F, Albanese, Jp, Aubert, Jj, Benchouk, C, Bonissent, A, Etienne, F, Nacasch, R, Payre, P, Pietrzyk, B, Qian, Z, Blum, W, Cattaneo, P, Comin, M, Cowan, G, Dehning, B, Dietl, H, Fernandezbosman, M, Hauff, D, Jahn, A, Lange, E, Lutjens, G, Lutz, G, Manner, W, Moser, Hg, Pan, Y, Richter, R, Schwarz, A, Settles, R, Stiegler, U, Stierlin, U, Stimpfl, G, Thomas, J, Waltermann, G, Debouard, G, Boucrot, J, Callot, O, Chen, X, Cordier, A, Davier, M, Ganis, G, Grivaz, Jf, Heusse, P, Janot, P, Journe, V, Kim, Dw, Lefrancois, J, Lloydowen, D, Lutz, Am, Marotte, P, Veillet, Jj, Amendolia, Sr, Bagliesi, G, Batignani, G, Bosisio, L, Bottigli, U, Bradaschia, C, Ferrante, I, Fidecaro, F, Foa, L, Focardi, E, Forti, F, Giassi, A, Giorgi, Ma, Ligabue, Franco, Lusiani, Alberto, Mannelli, Eb, Marrocchesi, P, Messineo, A, Palla, F, Sanguinetti, G, Scapellato, S, Steinberger, J, Tenchini, R, Tonelli, G, Triggiani, G, Carter, Jm, Green, Bj, Green, Mg, Mckemey, Ak, March, Pv, Medcalf, T, Saich, Mr, Strong, Ja, Thomas, Rm, Wildish, T, Botterill, Dr, Clifft, Rw, Edgecock, Tr, Edwards, M, Fisher, Sm, Harvey, J, Hill, Dl, Jones, Tj, Morrissey, M, Norton, Pr, Salmon, Dp, Thompson, Jc, Blochdevaux, B, Colas, P, Klopfenstein, C, Lancon, E, Locci, E, Loucatos, S, Mirabito, L, Monnier, E, Perez, P, Perrier, F, Rander, J, Renardy, Jf, Roussarie, A, Schuller, Jp, Ashman, Jg, Booth, Cn, Combley, F, Dinsdale, M, Martin, J, Parker, D, Thompson, Lf, Brandt, S, Burkhardt, H, Grupen, C, Meinhard, H, Neugebauer, E, Schafer, U, Seywerd, H, Stupperich, K, Gobbo, B, Liello, F, Milotti, E, Ragusa, F, Rolandi, Luigi, Bellantoni, L, Boudreau, Jf, Cinabro, D, Conway, J, Cowen, Df, Feng, Z, Harton, Jl, Hilgart, J, Jared, Rc, Johnson, Rp, Leclaire, Bw, Pan, Yb, Parker, T, Pater, Jr, Saadi, Y, Sharma, V, Wear, Ja, Weber, Fv, Wu, Sl, Xue, St, and Zobernig, G.
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Luminosity (scattering theory) ,Electron–positron annihilation ,High Energy Physics::Phenomenology ,Elementary particle ,Supersymmetry ,Charged particle ,Nuclear physics ,Chargino ,High Energy Physics::Experiment ,Photino ,Particle Physics - Experiment ,Boson - Abstract
We have performed a search for supersymmetric particles using acoplanar pairs of oppositely-charged particles in decays of the Z0. In 0.53 pb−1 of integrated luminosity near the Z0 peak, we observe two events where approximately four are expected from background, allowing limits to be extended on combined photino and slepton masses, and also on combined photino and chargino masses.
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- 1990
46. Properties of hadronic events in e+e− annihilation at
- Author
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D. Decamp, B. Deschizeaux, J.-P. Lees, M.-N. Minard, J.M. Crespo, M. Delfino, E. Fernandez, M. Martinez, R. Miquel, M.L. Mir, S. Orteu, A. Pacheco, J.A. Perlas, E. Tubau, M.G. Catanesi, M. De Palma, A. Farilla, G. Iaselli, G. Maggi, A. Mastrogiacomo, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chen, H. Hu, D. Huang, J. Lin, T. Ruan, T. Wang, W. Wu, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, F. Bird, E. Blucher, T. Charity, H. Drevermann, Ll. Garrido, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Lüke, A. Marchioro, P. Mato, J. May, V. Mertens, A. Minten, A. Miotto, P. Palazzi, M. Pepe-Altarelli, F. Ranjard, J. Richstein, A. Roth, J. Rothberg, H. Rotscheidt, W. Von Rüden, R. St.Denis, D. Schlatter, M. Takashima, M. Talby, H. Taureg, W. Tejessy, H. Wachsmuth, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, J.-C. Montret, D. Pallin, P. Perret, J. Prat, J. Proriol, F. Prulhière, H. Bertelsen, F. Hansen, J.D. Hansen, J.R. Hansen, P.H. Hansen, A. Lindahl, B. Madsen, R. Møllerud, B.S. Nilsson, G. Petersen, E. Simopoulou, A. Vayaki, J. Badier, D. Bernard, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J.C. Brient, M.A. Ciocci, R. Guirlet, P. Miné, A. Rougé, H. Videau, I. Videau, D. Zwierski, D.J. Candlin, A. Conti, G. Parrini, M. Corden, C. Georgiopoulos, J.H. Goldman, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. de Ninno, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G.P. Murtas, G. Nicoletti, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A.J. Flavell, A.W. Halley, I. Ten Have, J.L. Hearns, I.S. Hughes, J.G. Lynch, D.J. Martin, R. O'Neill, C. Raine, J.M. Scarr, K. Smith, A.S. Thompson, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E.E. Kluge, Y. Maumary, M. Panter, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, G.J. Barber, A.T. Belk, R. Beuselinck, D.M. Binnie, W. Cameron, M. Cattaneo, P.J. Dornan, S. Dugeay, R.W. Forty, D.N. Gentry, J.F. Hassard, D.G. Miller, D.R. Price, J.K. Sedgbeer, G. Taylor, I.R. Tomalin, P. Girtler, D. Kuhn, G. Rudolph, T.J. Brodbeck, C.K. Bowdery, A.J. Finch, F. Foster, G. Hughes, N.R. Keemer, M. Nuttall, B.S. Rowlingson, T. Sloan, S.W. Snow, T. Barczewski, L.A.T. Bauerdick, K. Kleinknecht, D. Pollmann, B. Renk, S. Roehn, H.-G. Sander, M. Schmelling, F. Steeg, J.-P. Albanese, J.-J. Aubert, C. Benchouk, A. Bonissent, F. Etienne, R. Nacasch, P. Payre, B. Pietrzyk, Z. Qian, W. Blum, P. Cattaneo, M. Comin, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, D. Hauff, A. Jahn, E. Lange, G. Lütjens, G. Lutz, W. Männer, H.-G. Moser, Y. Pan, R. Richter, A.S. Schwarz, R. Settles, U. Stiegler, U. Stierlin, G. Stimpfl, J. Thomas, G. Waltermann, G. De Bouard, J. Boucrot, O. Callot, A. Cordier, M. Davier, G. Ganis, J.-F. Grivaz, Ph. Heusse, P. Janot, V. Journé, D.W. Kim, J. Lefrançois, D. Lloyd-Owen, A.-M. Lutz, P. Marotte, J.-J. Veillet, S.R. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, I. Ferrante, F. Fidecaro, L. Foà, E. Focardi, F. Forti, A. Giassi, M.A. Giorgi, F. Ligabue, A. Lusiani, E.B. Mannelli, P.S. Marrocchesi, A. Messineo, F. Palla, G. Sanguinetti, S. Scapellato, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, J.M. Carter, B.J. Green, M.G. Green, A.K. McKemey, P.V. March, T. Medcalf, M.R. Saich, J.A. Strong, R.M. Thomas, T. Wildish, D.R. Botterill, R.W. Clifft, T.R. Edgecock, M. Edwards, S.M. Fisher, J. Harvey, D.L. Hill, T.J. Jones, M. Morrissey, P.r. Norton, D.P. Salmon, J.C. Thompson, B. Bloch-Devaux, P. Colas, C. Klopfenstein, E. Lançon, E. Locci, S. Loucatos, L. Mirabito, E. Monnier, P. Perez, F. Perrier, J. Rander, J.-F. Renardy, A. Roussarie, J.-P. Schuller, J.G. Ashman, C.N. Booth, F. Combley, M. Dinsdale, J. Martin, D. Parker, L.F. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, E. Neugebauer, U. Schäfer, H. Seywerd, K. Stupperich, B. Gobbo, F. Liello, E. Milotti, F. Ragusa, L. Roland, L. Bellantoni, J.F. Boudreau, D. Cinabro, J.S. Conway, D.F. Cowen, Z. Feng, J.L. Harton, J. Hilgart, R.C. Jared, R.P. Johnson, B.W. Leclaire, Y.B. Pan, T. Parker, J.R. Pater, Y. Saadi, V. Sharma, J.A. Wear, F.V. Weber, null Sau Lan Wu, S.T. Xue, and G. Zobernig
- Subjects
Physics ,Nuclear physics ,Quantum chromodynamics ,Nuclear and High Energy Physics ,Aleph ,Particle physics ,Annihilation ,Large Hadron Collider ,Electron–positron annihilation ,Hadron ,Large Electron–Positron Collider ,High Energy Physics::Experiment ,Sphericity - Abstract
We report on properties of hadronic events from e+e− annihilation observed by the ALEPH detector at the large Electron Positron Collider at CERN. The center-of-mass energy was . Measured distributions of the global event-shape variables sphericity, aplanarity, thrust and minor value, and of the inclusive variables xp, p⊥in, p⊥out and y are presented. We measure a mean charged multiplicity in hadronic events of 〈Nch〉=21.3±0.1 (statistical)±0.6 (systematic). The data are in good agreement with QCD-based models which use the leading-logarithm approximation, and are less well described by a model using O(αs2) QCD.
- Published
- 1990
47. First Measurement of Charged Current Cross Sections at HERA with Longitudinally Polarised Positrons
- Author
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C. Risler, Daniel Pitzl, D. Traynor, Wolfram Erdmann, B. List, L. Finke, A. Asmone, J. Zimmermann, S. Ghazaryan, Y.C. Zhu, C. Wissing, D. Lüke, Thorsten Lux, L. Janauschek, F. Cassol-Brunner, H. Peng, E. Wünsch, T. Kluge, Katerina Lipka, V. Tchoulakov, R.N. Shaw-West, Dave Sankey, A. Nikiforov, C. Gwilliam, A. Astvatsatourov, K. Daum, G. Knies, J. Feltesse, Ilias Panagoulias, Matthias Ulrich Mozer, A. Fedotov, L. Hajduk, T. Laštovička, E. Barrelet, Z. Rurikova, Max Klein, Zhen Zhang, E. A. De Wolf, Ch. Berger, L. Bystritskaya, S. Baumgartner, I. Foresti, G. Cozzika, G. D. Patel, Biljana Antunović, D.P. Johnson, Ricardo Lopez-Fernandez, C. Pascaud, Guenter Eckerlin, N. Malden, Pavel Murin, M. Ibbotson, M. Urban, S. Ginzburgskaya, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, Karlheinz Meier, R. Roosen, V. Lubimov, M. Goettlich, H. Zohrabyan, Laurent Favart, T. Anthonis, V. Chekelian, H. U. Martyn, Paul Laycock, M. Steder, C. Schmitz, M. Ismail, David Milstead, E. Malinovski, R. Marshall, Jan Kretzschmar, Andrej Liptaj, Laurent Schoeffel, Hannes Jung, G. Tsipolitis, J. V. Morris, Alexander Zhokin, Jenny List, C. Wigmore, Emmanuel Sauvan, G. Grindhammer, J. Becker, C. Vallée, D. Hoffmann, B. Reisert, D. Sunar, A.J. Rahmat, A. Bunyatyan, V. Jemanov, K. Urban, D. Meer, Murrough Landon, K. Nankov, L. N. Shtarkov, A. D.R. Vargas Trevino, A. Makankine, A. Usik, Leif J. Jönsson, Benoit Roland, G. Buschhorn, D. Ozerov, S. Gorbounov, A. M. Fomenko, Y. de Boer, I. Sheviakov, S. Hussain, V. Yeganov, D. Wegener, A. Dubak, T. Frisson, I. Strauch, G. Thompson, B. R. Grell, Søren Schmidt, D. Mladenov, P. A. Smirnov, C. Gerlich, R. Weber, Philipp Fleischmann, F. Moreau, S. J. Aplin, Paul Richard Newman, Grzegorz Nowak, A. Lebedev, F. Salvaire, D. Haidt, L. Lytkin, T. Klimkovich, R. Plačakytė, P. Van Mechelen, Y. Vazdik, P.D. Thompson, F. Tomasz, Judith Katzy, H. Henschel, J.C. Bizot, Cristinel Diaconu, Eram Rizvi, A. Petrukhin, J. Zálešák, V. Spaskov, Stefania Xella, G. Heinzelmann, V. Dodonov, V. Efremenko, Wolfgang Lange, Pierre Marage, A. Aktas, M. Jacquet, J. Kückens, K. Wacker, M. Kapichine, M. Nozicka, A. B. Meyer, E. Perez, G. Flucke, S. Levonian, S. Essenov, I. Glushkov, Stephen Maxfield, V. Lendermann, J. Gayler, S. Mikocki, C. Goyon, B. Delcourt, Th. Naumann, K. H. Hiller, R. C. W. Henderson, J. Stiewe, K. Krastev, M. Fleischer, S. Schätzel, I. Milcewicz-Mika, Ewelina Lobodzinska, Andrew Mehta, J. Bracinik, Anton Babaev, J. G. Contreras, Dusan Bruncko, N. Gogitidze, B. Naroska, L. Lindfeld, J. E. Olsson, G. Laštovička-Medin, A.-I. Lucaci-Timoce, Matthew Beckingham, P. E. Reimer, E. Gabathuler, V. Brisson, A. Mohamed, I. R. Kenyon, W. Bartel, P. Prideaux, Malte Hildebrandt, O. Behnke, Klaus Desch, Anna Kropivnitskaya, T. Greenshaw, Erika Garutti, A. Specka, David South, F. W. Büsser, Bogdan Povh, F. Sefkow, A. W. Jung, A. Rimmer, Theodora Papadopoulou, Peter Robmann, S. Baudrand, A. Schöning, M. Wessels, A. Knutsson, K. Krüger, Natasa Raicevic, T. Zimmermann, G. Herrera, Vincent Boudry, V. Michels, W.D. Dau, Bradley Cox, R. Wolf, B. Wessling, J. B. Dainton, J. Ferencei, M. Martisikova, A. N. Morozov, D. Perez-Astudillo, M. Gregori, S. Backovic, H. Lueders, Claus Kleinwort, Magnus Hansson, M. Del Degan, L. Goerlich, K. Müller, W. Yan, J. Cvach, N. Loktionova, A. Hovhannisyan, I. Tsurin, B. Portheault, C. Niebuhr, S. Egli, Y. Soloviev, E. E. Elsen, Christoph Grab, A. Baghdasaryan, A. Rostovtsev, D. Utkin, J. Bähr, B. Olivier, P. Baranov, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, G. Weber, U. Straumann, V. Korbel, C. Werner, J. Wagner, Karel Cerny, A. Glazov, John A Coughlan, B. Stella, Stefan Schmitt, Vladimir Palichik, F. Eisele, R. Oganezov, K. Sedlák, V. Cerny, F. Zomer, V. Andreev, G. Franke, J. Žáček, Hans-Christian Schultz-Coulon, A. Falkewicz, Tomas Hreus, R. Eichler, M.-O. Boenig, S. Mangano, Nicolas Berger, A. Zhelezov, Adrian Perieanu, Gerhard Brandt, V. Volchinski, H. Meyer, Xavier Janssen, J-P. Meyer, Sakar Osman, C. Veelken, O. Behrendt, S. Vinokurova, P. Kostka, J. Turnau, I. Tsakov, Roland Horisberger, A. Valkárová, G. Leibenguth, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,FOS: Physical sciences ,HERA ,01 natural sciences ,Measure (mathematics) ,High Energy Physics - Experiment ,Calorimeter ,Standard Model ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Cross section (physics) ,Positron ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,ddc:530 ,High Energy Physics::Experiment ,010306 general physics ,Charged current ,Bar (unit) - Abstract
Data taken with positrons of different longitudinal polarisation states in collision with unpolarised protons at HERA are used to measure the total cross sections of the charged current process, e^+ p \to \bar��X, for negative four-momentum transfer squared Q^2 > 400 GeV^2 and inelasticity y, 13 pages, 2 figures, 1 table
- Published
- 2006
48. Diffractive photoproduction of rho mesons with large momentum transfer at HERA
- Author
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Grzegorz Nowak, S. Egli, I. Sheviakov, S. Schmitt, J. E. Olsson, W. Bartel, D. Wegener, Y. Soloviev, L. Finke, F. P. Schilling, P. E. Reimer, C. Wigmore, Y.C. Zhu, M.-O. Boenig, A. Petrukhin, K. Daum, A. Vest, O. Behrendt, S. Vinokurova, F. W. Büsser, S. Mangano, Nicolas Berger, Christoph Grab, V. Efremenko, F. Tomasz, I. R. Kenyon, A. Zhelezov, S. Baudrand, G. Knies, Natasa Raicevic, S. Mikocki, S. Ghazaryan, P. Kostka, Adrian Perieanu, Gerhard Brandt, V. Spaskov, V. Volchinski, J. Kückens, K. Wacker, H. Meyer, Vincent Boudry, J. Zacek, Xavier Janssen, H. U. Martyn, K. H. Hiller, A. Baghdasaryan, R. C. W. Henderson, A. Rostovtsev, A. N. Morozov, D. Perez-Astudillo, P. Baranov, D. Lüke, E. Wünsch, Ilias Panagoulias, M. Gregori, J. Turnau, Dave Sankey, Hans-Christian Schultz-Coulon, Daniel Pitzl, D. Utkin, R.N. Shaw-West, J. Bähr, J-P. Meyer, D. Traynor, S. Hussain, O. Henshaw, D. South, Wolfgang Lange, A. Asmone, B. R. Grell, V. Korbel, I. Tsakov, V. Lubimov, M. Goettlich, Katja Krüger, V. Chekelian, G. D. Patel, A. M. Fomenko, Max Klein, A. Specka, F. Cassol-Brunner, Laurent Schoeffel, D.P. Johnson, Paul Laycock, L. Hajduk, V. Brisson, G. Thompson, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, A. D.R. Vargas Trevino, P. Truöl, A. Dubak, A. Falkewicz, E. Malinovski, Emmanuel Sauvan, D.P. Brown, Katerina Lipka, N. Malden, Tomas Hreus, R. Eichler, C. Pascaud, A. Lebedev, J. Gayler, R. Plačakyte, C. Gerlich, Murrough Landon, G. Grindhammer, F. Salvaire, Jan Kretzschmar, D. Haidt, Roland Horisberger, A. Valkárová, V. Tchoulakov, Anton Babaev, Y. Vazdik, M. Ismail, S. Gorbounov, N. Werner, Andrej Liptaj, Pierre Marage, Eram Rizvi, David Milstead, A. Mohamed, W. Yan, P. A. Smirnov, G. Heinzelmann, K. Krastev, K. Nankov, P. Prideaux, V. Dodonov, D. Mladenov, C. Werner, L. N. Shtarkov, J. Zimmermann, N. Loktionova, M. Peez, Stefania Xella, M. Urban, F. Eisele, I. Glushkov, H. Henschel, Theodora Papadopoulou, L. Lindfeld, J.C. Bizot, A. Hovhannisyan, J. V. Morris, P. Van Mechelen, Fabian Zomer, R. Weber, A. Bunyatyan, J.G. Contreras, J. Wagner, I. Tsurin, M. Jacquet, G. Laštovička-Medin, O. Behnke, I. Foresti, G. Cozzika, K. Desch, Guenter Eckerlin, P. D. Thompson, V. Yeganov, Dusan Bruncko, J. Zalesak, Stefan Valkar, L. Bystritskaya, B. Naroska, E. Gabathuler, Karel Cerny, I. Milcewicz-Mika, T. Kluge, F. Moreau, S. J. Aplin, S. Levonian, H. Zohrabyan, C. Schmitz, Y. H. Fleming, T. Greenshaw, Erika Garutti, Hannes Jung, Alexander Zhokin, J. Becker, Pavel Murin, A. Schöning, C. Vallée, Leif J. Jönsson, Benoit Roland, J. Ferencei, M. Martisikova, M. Ibbotson, Emmanuelle Perez, A. Glazov, Zhen Zhang, Sakar Osman, Claus Kleinwort, Ricardo Lopez-Fernandez, S. Essenov, Paul Newman, A. Rimmer, Gero Flucke, Laurent Favart, M. Kapichine, M. Nozicka, G. Herrera, S. Baumgartner, T. Laštovička, M. Beckingham, T. Anthonis, Andreas Meyer, C. Veelken, Matthias Ulrich Mozer, D. Meer, A. Usik, E. Barrelet, A. Knutsson, A. Fedotov, T. Klimkovich, B. Vujicic, B. Delcourt, Peter Robmann, Z. Rurikova, G. Weber, U. Straumann, E. A. De Wolf, Ch. Berger, S. Ginzburgskaya, C. Kiesling, Karlheinz Meier, R. Roosen, Thomas Naumann, A. Nikiforov, S. Schätzel, A. De Roeck, W.D. Dau, Georgios Tsipolitis, M. Fleischer, E. Tzamariudaki, A. J. Campbell, J. B. Dainton, C. Goyon, Y. de Boer, L. Lytkin, Cristinel Diaconu, V. Jemanov, N. Keller, V. Lendermann, Bogdan Povh, F. Sefkow, T. Zimmermann, A.-I. Lucaci-Timoce, C. Risler, Stephen Maxfield, S. Backovic, J. Stiewe, H. Lueders, R. Marshall, C. Gwilliam, Andrew Mehta, J. Bracinik, M. Hildebrandt, A. Aktas, N. Gogitidze, A. Makankine, Judith Katzy, B. Olivier, G. Buschhorn, D. Ozerov, B. Portheault, A. W. Jung, M. Wessels, M. Ellerbrock, G. Leibenguth, Bradley Cox, R. Wolf, B. Wessling, T. Frisson, I. Strauch, Philipp Fleischmann, S. Caron, D.K. Nikitin, K. Müller, B. Stella, Wolfram Erdmann, B. List, J. Cvach, Vladimir Palichik, Ewelina Lobodzinska, C. Wissing, Anna Kropivnitskaya, R. Felst, Thorsten Lux, L. Janauschek, R. Oganezov, K. Sedlák, V. Cerny, S. Schmidt, A. Astvatsatourov, V. Andreev, John A Coughlan, Magnus Hansson, L. Goerlich, Dirk L. Hoffmann, G. Franke, C. Niebuhr, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Nuclear and High Energy Physics ,Particle physics ,Photon ,Meson ,Nuclear Theory ,FOS: Physical sciences ,7. Clean energy ,01 natural sciences ,Power law ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,ddc:530 ,010306 general physics ,Nuclear Experiment ,Physics ,010308 nuclear & particles physics ,Momentum transfer ,Gamma ray ,Perturbative QCD ,HERA ,Helicity ,Physique des particules élémentaires ,High Energy Physics::Experiment - Abstract
The diffractive photoproduction of ρ mesons, e p → e ρ Y, with large momentum transfer squared at the proton vertex, |t|, is studied with the H1 detector at HERA using an integrated luminosity of 20.1 pb-1. The photon-proton centre of mass energy spans the range 75 < W < 95 GeV, the photon virtuality is restricted to Q2 < 0.01 GeV2 and the mass MY of the proton remnant is below 5 GeV. The t dependence of the cross section is measured for the range 1.5 < | t | < 10.0 GeV2 and is well described by a power law, d σ / d | t | ∝ | t |- n. The spin density matrix elements, which provide information on the helicity structure of the interaction, are extracted using measurements of angular distributions of the ρ decay products. The data indicate a violation of s-channel helicity conservation, with contributions from both single and double helicity-flip being observed. The results are compared to the predictions of perturbative QCD models., Physics Letters B, 638 (5-6), ISSN:0370-2693, ISSN:0031-9163, ISSN:1873-2445
- Published
- 2006
49. Elastic J/Psi Production at HERA
- Author
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S. Levonian, I. Foresti, G. Cozzika, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, M.-O. Boenig, P. E. Reimer, David South, A. Nikiforov, C. Goyon, P. D. Thompson, V. Yeganov, S. Mangano, K. Krüger, R. Marshall, F. Moreau, S. J. Aplin, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, B. Portheault, Nicolas Berger, Matthias Ulrich Mozer, A. Fedotov, G. Laštovička-Medin, Klaus Desch, A. Rimmer, A. Petrukhin, A. Knutsson, D. Wegener, Gero Flucke, M. Kapichine, M. Nozicka, A. Zhelezov, S. Ginzburgskaya, C. Kiesling, E. Tzamariudaki, A. J. Campbell, S. Essenov, Sakar Osman, Paul Laycock, E. Malinovski, Emmanuel Sauvan, A. M. Fomenko, V. Lubimov, S. Baudrand, Wolfgang Lange, Adrian Perieanu, B. Delcourt, K. H. Hiller, R. C. W. Henderson, C. Veelken, G. Grindhammer, V. P. Andreev, C. Gerlich, J. Gayler, F. Eisele, V. Jemanov, Magnus Hansson, M. Del Degan, D. Meer, D. Mladenov, Gerhard Brandt, Th. Naumann, C. Wigmore, R.N. Shaw-West, K. Nankov, C. Niebuhr, V. Efremenko, L. N. Shtarkov, Leif J. Jönsson, Benoit Roland, S. Schätzel, Søren Schmidt, R. Oganezov, K. Sedlák, A. Specka, V. Volchinski, S. Egli, Theodora Papadopoulou, Peter Robmann, A. D.R. Vargas Trevino, G. Nowak, T. Klimkovich, Roland Horisberger, J. Cvach, A. Valkárová, C. Risler, Xavier Janssen, E. Gabathuler, Y. Soloviev, S. Mikocki, V. Cerny, Ricardo Lopez-Fernandez, S. Hussain, S. Baumgartner, B. List, A. Aktas, Andreas Meyer, W. Yan, J. Zacek, Georgios Tsipolitis, M. Fleischer, Michael R. Wessels, Z. P. Zhang, F. P. Schilling, J. Zimmermann, J-P. Meyer, S. Backovic, A. Usik, V. Brisson, John A Coughlan, Laurent Schoeffel, H. Lueders, H. Henschel, J.C. Bizot, N. Loktionova, B. R. Grell, E. Lobodzinska, Stephen Maxfield, Bogdan Povh, F. Tomasz, F. Sefkow, A. Dubak, L. Bystritskaya, M. Goettlich, J. Stiewe, C. Gwilliam, B. Stella, Stefan Schmitt, A. Hovhannisyan, Christoph Grab, H. Zohrabyan, Y. Vazdik, D. Lüke, T. Kluge, Matthew Beckingham, Andrew Mehta, J. Bracinik, A. Astvatsatourov, M. Peez, Stefania Xella, N. Gogitidze, Katerina Lipka, Anna Kropivnitskaya, Dirk L. Hoffmann, R. Felst, G. Franke, K. Krastev, A. Vest, V. Tchoulakov, O. Behrendt, S. Vinokurova, V. Lendermann, L. Lindfeld, J. E. Olsson, T. Frisson, I. Strauch, T. Laštovička, W. Bartel, Philipp Fleischmann, E. Barrelet, Guenter Eckerlin, André Schöning, Malte Hildebrandt, Hans-Christian Schultz-Coulon, F. W. Büsser, L. Goerlich, P. Kostka, A.-I. Lucaci-Timoce, I. R. Kenyon, Z. Rurikova, A. Falkewicz, Natasa Raicevic, E. A. De Wolf, Ch. Berger, I. Tsurin, Vladimir Palichik, A. Baghdasaryan, Vincent Boudry, A. N. Morozov, D. Perez-Astudillo, M. Gregori, J. Turnau, Karlheinz Meier, R. Roosen, A. W. Jung, R. Eichler, A. Rostovtsev, Judith Katzy, Y. de Boer, M. Ellerbrock, A. Asmone, G. Herrera, Bradley Cox, J. Wagner, R. Wolf, B. Wessling, D. Utkin, J. Bähr, I. Tsakov, Karel Cerny, P. Baranov, Graham Thompson, A. Glazov, V. Korbel, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, H. U. Martyn, Matthias Klein, E. E. Elsen, K. Müller, Alexandre Lebedev, C. Werner, Paul Newman, T. Zimmermann, G. Leibenguth, G. Weber, U. Straumann, M. Jacquet, I. Milcewicz-Mika, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, Pavel Murin, M. Ibbotson, B. Olivier, Laurent Favart, T. Anthonis, Murrough Landon, S. Gorbounov, W.D. Dau, J. B. Dainton, P. Van Mechelen, L. Finke, Y.C. Zhu, K. Daum, Ilias Panagoulias, G. Knies, Wolfram Erdmann, R. Plačakyte, S. Ghazaryan, M. Ismail, David Milstead, P. A. Smirnov, S. Caron, Daniel Pitzl, D. Traynor, J. V. Morris, F. Cassol-Brunner, D.K. Nikitin, O. Henshaw, L. Hajduk, Jenny List, M. Urban, C. Wissing, A.J. Rahmat, A. Bunyatyan, Thorsten Lux, L. Janauschek, Jan Kretzschmar, Andrej Liptaj, E. Wünsch, Dave Sankey, G. D. Patel, K. Wacker, H. Meyer, Biljana Antunović, D.P. Johnson, N. Malden, David Schmidt, C. Pascaud, F. Salvaire, D. Haidt, T. Hreus, L. Lytkin, A. De Roeck, Cristinel Diaconu, Eram Rizvi, Pierre Marage, G. Heinzelmann, V. Dodonov, I. Glushkov, O. Behnke, V. Chekelian, I. Sheviakov, Peter Truoel, J. Zálešák, V. Spaskov, J. Kückens, Dusan Bruncko, B. Naroska, E. Perez, T. Greenshaw, Erika Garutti, J. Ferencei, M. Martisikova, Claus Kleinwort, Fabian Zomer, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
- Subjects
Particle physics ,Physics and Astronomy (miscellaneous) ,Meson ,Proton ,Nuclear Theory ,FOS: Physical sciences ,7. Clean energy ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Pomeron ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,ddc:530 ,010306 general physics ,Nuclear Experiment ,Engineering (miscellaneous) ,Physics ,Luminosity (scattering theory) ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Perturbative QCD ,HERA ,Helicity ,Gluon ,High Energy Physics::Experiment - Abstract
Cross sections for elastic production of J/Psi mesons in photoproduction and electroproduction are measured in electron proton collisions at HERA using an integrated luminosity of 55 pb^{-1}. Results are presented for photon virtualities Q^2 up to 80 GeV^2. The dependence on the photon-proton centre of mass energy W_{gamma p} is analysed in the range 40 < \Wgp < 305 GeV in photoproduction and 40 < \Wgp < 160 GeV in electroproduction. The \Wgp dependences of the cross sections do not change significantly with Q^2 and can be described by models based on perturbative QCD. Within such models, the data show a high sensitivity to the gluon density of the proton in the domain of low Bjorken x and low Q^2. Differential cross sections d��/dt, where t is the squared four-momentum transfer at the proton vertex, are measured in the range |t, 40 pages, 14 figures, 15 tables
- Published
- 2006
50. Measurement of Event Shape Variables in Deep-Inelastic Scattering at HERA
- Author
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T. Laštovička, E. Barrelet, Z. Rurikova, Stephen Maxfield, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, J. Stiewe, V. Jemanov, Y. de Boer, Andrew Mehta, J. Bracinik, N. Gogitidze, Søren Schmidt, Ilias Panagoulias, C. Risler, C. Wissing, B. List, Max Klein, G. Flucke, A. Aktas, A. W. Jung, I. Sheviakov, R. Plačakyte, C. Gwilliam, Peter Robmann, G. Herrera, Bradley Cox, R. Wolf, M. Ismail, David Milstead, V. Lubimov, V. Korbel, A. Petrukhin, P. A. Smirnov, A. Astvatsatourov, E. Gabathuler, J. Zálešák, V. Spaskov, B. Olivier, P. Baranov, V. Lendermann, Thorsten Lux, L. Janauschek, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, J. Kückens, K. Wacker, A. B. Meyer, A. Nikiforov, C. Goyon, Anton Babaev, J. G. Contreras, A. Mohamed, M. Kapichine, M. Nozicka, B. R. Grell, B. Wessling, M.-O. Boenig, D. Sunar, A. Baghdasaryan, A. Rostovtsev, P. Prideaux, Magnus Hansson, A.-I. Lucaci-Timoce, Dusan Bruncko, S. Backovic, M. Del Degan, B. Naroska, Alexandre Lebedev, C. Werner, K. Nankov, Katerina Lipka, Paul Laycock, E. Malinovski, L. N. Shtarkov, Georgios Tsipolitis, M. Fleischer, F. Tomasz, Pavel Murin, V. Tchoulakov, H. Lueders, Michael R. Wessels, H. U. Martyn, Emmanuel Sauvan, G. Grindhammer, T. Greenshaw, V. Brisson, S. Schätzel, M. Ibbotson, Nicolas Berger, D. Utkin, G. Nowak, R.N. Shaw-West, S. Hussain, T. Hreus, L. Lytkin, A. Dubak, J. Bähr, A. D.R. Vargas Trevino, G. Thompson, C. Niebuhr, J. Ferencei, M. Martisikova, Cristinel Diaconu, Laurent Favart, T. Anthonis, Pierre Marage, R. Marshall, Leif J. Jönsson, V. Michels, W.D. Dau, Benoit Roland, D. Mladenov, J. V. Morris, A. Zhelezov, S. Baudrand, K. Müller, Y. Vazdik, Paul Newman, T. Zimmermann, J. B. Dainton, S. Egli, D. Lüke, Claus Kleinwort, Stefania Xella, M. Goettlich, Sakar Osman, H. Peng, K. Krastev, Y. Soloviev, J-P. Meyer, I. Glushkov, S. Levonian, Jenny List, A.J. Rahmat, A. Bunyatyan, T. Klimkovich, L. Lindfeld, J. Zimmermann, A. Makankine, E. Lobodzinska, Bogdan Povh, F. Sefkow, G. Weber, G. Leibenguth, Matthias Ulrich Mozer, A. Fedotov, S. Ginzburgskaya, H. Henschel, Fabian Zomer, I. Foresti, Dirk L. Hoffmann, J. C. Bizot, G. Franke, G. Cozzika, J. Cvach, Christoph Grab, C. Veelken, C. Kiesling, G. Buschhorn, F. Eisele, D. Ozerov, R. Weber, T. Kluge, Judith Katzy, A. De Roeck, E. Tzamariudaki, A. J. Campbell, E. Perez, T. Frisson, I. Strauch, Philipp Fleischmann, R. Oganezov, A. Asmone, C. Schmitz, U. Straumann, Thomas Naumann, Erika Garutti, K. Sedlák, Hannes Jung, Alexander Zhokin, Wolfgang Lange, K. H. Hiller, R. C. W. Henderson, Daniel Pitzl, J. Becker, J. Wagner, D. Wegener, C. Vallée, Zhen Zhang, Ricardo Lopez-Fernandez, D. Traynor, I. Milcewicz-Mika, David South, Laurent Schoeffel, V. Chekelian, V. Cerny, J. Gayler, F. Cassol-Brunner, K. Krüger, S. Baumgartner, L. Hajduk, Karel Cerny, Guenter Eckerlin, André Schöning, D. Meer, E. Wünsch, O. Behnke, M. Urban, L. Goerlich, Dave Sankey, M. Steder, Wolfram Erdmann, V. Efremenko, Jan Kretzschmar, J. Žáček, P. E. Reimer, B. Delcourt, Andrej Liptaj, S. Mikocki, A. Glazov, A. Usik, A. Specka, G. D. Patel, Adrian Perieanu, H. Meyer, Matthew Beckingham, Biljana Antunović, D.P. Johnson, S. Ghazaryan, G. Laštovička-Medin, O. Behrendt, S. Vinokurova, N. Malden, Anna Kropivnitskaya, R. Felst, Hans-Christian Schultz-Coulon, Klaus Desch, C. Pascaud, A. M. Fomenko, A. Rimmer, J. E. Olsson, F. Salvaire, W. Bartel, V. P. Andreev, D. Haidt, B. Portheault, C. Gerlich, A. Knutsson, Gerhard Brandt, Eram Rizvi, Theodora Papadopoulou, Malte Hildebrandt, C. Wigmore, K. Urban, G. Heinzelmann, Murrough Landon, V. Dodonov, P. Kostka, S. Gorbounov, P. D. Thompson, V. Volchinski, V. Yeganov, P. Van Mechelen, A. Falkewicz, L. Finke, F. W. Büsser, J. Turnau, Y.C. Zhu, K. Daum, S. Mangano, F. Moreau, R. Eichler, G. Knies, S. J. Aplin, I. Tsakov, Xavier Janssen, I. R. Kenyon, Roland Horisberger, A. Valkárová, Natasa Raicevic, J. Feltesse, Vincent Boudry, S. Essenov, A. N. Morozov, D. Perez-Astudillo, M. Gregori, L. Bystritskaya, H. Zohrabyan, W. Yan, N. Loktionova, A. Hovhannisyan, I. Tsurin, M. Jacquet, E. E. Elsen, B. Stella, Stefan Schmitt, Vladimir Palichik, John A Coughlan, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Quantum chromodynamics ,Physics ,Particle physics ,Luminosity (scattering theory) ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,Generator (category theory) ,FOS: Physical sciences ,Perturbative QCD ,HERA ,Jet (particle physics) ,Deep inelastic scattering ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,ddc:530 ,High Energy Physics::Experiment ,010306 general physics ,Engineering (miscellaneous) ,Energy (signal processing) - Abstract
Deep-inelastic ep scattering data taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb-1 are used to study the differential distributions of event shape variables. These include thrust, jet broadening, jet mass and the C-parameter. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions and analytical power law corrections, the latter accounting for non-perturbative hadronisation effects. The data clearly exhibit the running of the strong coupling αs(Q) and are consistent with a universal power correction parameter α0 for all event shape variables. A combined QCD fit using all event shape variables yields αs(mZ)=0.1198±0.0013 +0.0056 -0.0043 and α0=0.476±0.008 +0.018 -0.059., The European Physical Journal C, 46 (2), ISSN:1434-6044, ISSN:1434-6052
- Published
- 2006
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