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1. Quark and diquark fragmentation into neutral strange particles as observed in muon-proton interactions at 280 GeV

Author

D. Blum, F. G. Oakham, Michele Arneodo, B. Pietrzyk, J. Carr, H. E. Stier, J.M. Thenard, Paolo Giubellino, J. Favier, Claus Gössling, P. Grafström, P. R. Norton, T. Schröder, H. Brück, M. Whalley, P. B. Renton, A. Edwards, H. M. Braun, C. Pascaud, E. Böhm, Stephen Wimpenny, J. Williamson, K.H. Becks, J. J. Aubert, M. Pötsch, Kr Long, F. Dengler, Jc Thompson, R. W. Clifft, Christopher Bee, J. Shiers, J. Foster, V. Korbel, J. Pettingale, P. Payre, S. Wheeler, M.I. Ferrero, A. Manz, J. S. Chima, A. Schlagböhmer, J. Nassalski, W. Stockhausen, T. Ernst, C. Benchouk, B. Pönsgen, K. Schultze, N. Geddes, W. D. Dau, G. Kellner, D. Lanske, J. Drees, A. de la Torre, E. Rondio, G. Jancso, M. Studt, C. Broll, H.E. Montgomery, Gy. Wolf, J.K. Davies, D. Callebaut, J.H. Cobb, G. Eszes, Geoffrey Taylor, J. Gayler, P. Zank, F. Janata, I. Derado, Ulrich Landgraf, W. Wittek, E. Nagy, Richard Mount, F. W. Brasse, A. Jacholkowska, T. Dreyer, W. Mohr, H. Wahlen, S. Dahlgren, R. Gamet, J. G. Loken, E. Hagberg, W. Wallucks, Jane Coughlan, G. D'Agostini, F. Grard, V. Eckardt, L. Urban, K. Rith, Jozsef Toth, J. Figiel, Jennifer S. Haas, L. Paul, J. Beaufays, X. De Bouard, F. Combley, M. Maire, J.J. Dumont, W. Flauger, Ph. Heusse, P.J. Hayman, E. Gabathuler, M. Jaffre, F. Montanet, M. Schneegans, J. Krüger, U. Dosselli, Hans Calén, I. G. Bird, G. Coignet, A.M. Osborne, S. Kullander, T. J. Sloan, Cristiana Peroni, Roland Windmolders, C. Hoppe, A. Arvidson, Michael Düren, H. Pessard, L. Gustafsson, E. M. Kabuss, A. S. Johnson, H. Preissner, S.C. Brown, F.J. Hasert, N. Schmitz, G.R. Court, M. Edwards, P. Ribarics, and W.S.C. Williams

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Muon, Scattering, Hadron, Nuclear physics, Diquark, symbols.namesake, Fragmentation (mass spectrometry), symbols, Feynman diagram, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract

The production of K 0 s, Λs and Λ s has been studied in a 280 GeV muon-proton scattering experiment with almost complete coverage of all kinematic regions. A study is made of the dependence of the multiplicities on the hadronic centre of mass energy, W , and of the Feynman x distributions. It is found that K 0 and Λ production is mostly central and increases strongly with W , whereas Λ production comes mainly from the remnant target system and is only weakly W dependent.

Published
2016

2. Measurements of the nucleon structure function in the range 0.002 < x < 0.17 and 00.2 < Q2 < 8 GeV2 in deuterium, carbon and calcium

Author

M. Arneodo, A. Arvidson, J.J. Aubert, B. Badelek, J. Beaufays, C.P. Bee, C. Benchouk, G. Berghoff, I.G. Bird, D. Blum, E. Böhm, X. de Bouard, F.W. Brasse, H. Braun, C. Broll, S.C. Brown, H. Brück, H. Calén, J.S. Chima, J. Ciborowski, R. Clifft, G. Coignet, F. Combley, J. Coughlan, G. d'Agostini, S. Dahlgren, I. Derado, T. Dreyer, J. Drees, M. Düren, V. Eckardt, A. Edwards, M. Edwards, T. Ernst, G. Eszes, J. Favier, M.I. Ferrero, J. Figiel, W. Flauger, J. Foster, E. Gabathuler, J. Gajewski, R. Gamet, N. Geddes, P. Grafström, L. Gustafsson, J. Haas, E. Hagberg, F.J. Hasert, P. Hayman, P. Heusse, M. Jaffre, A. Jacholkowska, F. Janata, G. Jancso, A.S. Johnson, E.M. Kabuss, G. Kellner, A. Krüger, J. Krüger, S. Kullander, U. Landgraf, D. Lanske, J. Loken, K. Long, M. Maire, P. Malecki, A. Manz, S. Maselli, W. Mohr, F. Montanet, H.E. Montgomery, E. Nagy, J. Nassalski, P.R. Norton, F.G. Oakham, A.M. Osborne, C. Pascaud, B. Pawlik, P. Payre, C. Peroni, H. Peschel, H. Pessard, J. Pettingale, B. Pietrzyk, B. Poensgen, M. Pötsch, P. Renton, P. Ribarics, K. Rith, E. Rondio, A. Sandacz, M. Scheer, A. Schlagböhmer, H. Schiemann, N. Schmitz, M. Schneegans, M. Scholz, M. Schouten, T. Schröder, K. Schultze, T. Sloan, H.E. Stier, M. Studt, G.N. Taylor, J.M. Thenard, J.C. Thompson, A. de la Torre, J. Toth, L. Urban, W. Wallucks, M. Whalley, S. Wheeler, W.S.C. Williams, S.J. Wimpenny, R. Windmolders, and G. Wolf

Subjects
Physics, Nuclear and High Energy Physics, Muon, Deuterium, Scattering, HERA, Small-angle scattering, Atomic physics, Inelastic scattering, Nucleon, Deep inelastic scattering
Abstract

Small angle scattering of 280 GeV positive muons by deuterium, carbon and calcium has been measured at scattering angles down to 2 mrad. The nucleon structure function F 2 extracted from deuterium does not show a significant x dependence in the measured range of Q 2 and its Q 2 dependence is linear in log Q 2 . For calcium, a depletion of F 2 is observed at low x by 30% as compared with the values at x = 0.1 where F 2 (Ca) and F 2 (D) are not significantly different. This depletion is attributed to shadowing. The carbon structure function exhibits a similar, but less pronounced, x dependence. Such behaviour is observed to be independent of Q 2 . The data are consistent with those obtained from other charged lepton experiments both at similar and higher values of x and Q 2 and considerably extend the range of the measurements down to the low values of x to be measured in forthcoming experiments at HERA.

Published
1990

3. Observation of muon-neutrino reactions producing a positron and a strange particle

Author

M. Pohl, H. Deden, A. Pullia, T.W. Jones, H. Wachsmuth, F.J. Hasert, L. Jauneau, U. Nguyen-Khac, D. Lanske, I. Danilchenko, J.B.M. Pattison, A.M. Lutz, M. Jaffre, C. Pascaud, M. Haguenauer, E. Fiorini, C. Matteuzzi, G. Myatt, A. Blondel, M. Rollier, D. Blum, J. Morfin, W. Van Doninck, P. Van Dam, D. Pittuck, K. Myklebost, J. Sacton, W. Krenz, D.H. Perkins, T. Francois, J.P. Vialle, G. Bertrand-Coremans, E. Bellotti, Ph. Heusse, V. Brisson, S. Bonetti, A. Lloret, D. Cavalli, P. Musset, B. Degrange, L. Kluberg, F.W. Bullock, L. Welch, H. Mulkens, H. Weerts, F. Romano, B. Aubert, P. Petiau, A. Aldrovandi, A. Rousset, C. Longuemare, D.C. Cundy, D. Haidt, A.G. Michette, L.M. Chounet, J. Blietschau, 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), and Starita, Sabine

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Strange quark, Large Hadron Collider, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, 01 natural sciences, Nuclear physics, Gargamelle, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Bubble chamber, High Energy Physics::Experiment, Muon neutrino, Nuclear Experiment, 010306 general physics, Event (particle physics), Particle Physics - Experiment, Particle Physics - Phenomenology, Lepton
Abstract

In addition to one previously reported event, a second event, in which a positron is observed together with a strange particle and a negative muon, has been seen in the bubble chamber Gargamelle exposed to the CERN neutrino beam. The level of the background for this type of event is found to be very low. The data strongly indicate the existence of a new type of interaction leading to a charged lepton pair correlated with a strange particle in the final state. The interpretation of these two events in terms of production of a charmed hadron is presented.

Published
1976

4. Total cross sections νμ and ḡnμcharged-current interactions between 20 and 200 GeV

Author

M. M. Mobayyen, B. Wünsch, H. Deden, E. Pagiola, Ch. Peyrou, Luc Pape, H. Wachsmuth, Th. Kokott, H. Klein, A. Vayaki, D. R. O. Morrison, I. Butterworth, A. Petrides, D.C. Cundy, F.J. Hasert, E. Simopoulou, K. Böckmann, P. O. Hulth, W. G. Scott, H. Grässler, P. Bosetti, Keith W. J. Barnham, B. Nellen, C. Penfold, Donald H. Perkins, A. Grant, P. Fritze, Daniel Vignaud, K. J. Powell, D. B. Miller, Reinhard W. Schulte, C. Albajar, G. Iaselli, B. Saitta, B. Tallini, J. Velasco, T. Bolognese, and D. Radojicic

Subjects
Physics, Nuclear and High Energy Physics, Antiparticle, Particle physics, Muon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Elementary particle, Nuclear physics, Antimatter, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Big European Bubble Chamber, Lepton
Abstract

Exposures of the Ne/H 2 filled Big European Bubble Chamber (BEBC) to a dichromatic neutrino (antineutrino) beam produced by 400 GeV protons of the CERN SPS yielded ∼ 3100 events with a negative, and ∼ 1100 with a positive, muon. The neutrino flux is determined from the muon flux in the shielding. Assuming a linear energy dependence of the cross section, the values σ E between 20 and 200 GeV are found to be 0.657 ± 0.012 (stat.) ± 0.027 (syst.) and 0.309 ± 0.009 (stat.) ± 0.013 (syst.) cm 2 (GeV nucleon) −1 , for neutrinos and antineutrinos, respectively. The scaling variable q 2 E decreases significantly with increasing energy both for neutrinos and antineutrinos.

Published
1982

5. Measurements of the u valence quark distribution function in the proton and u quark fragmentation functions

Author

M. Arneodo, A. Arvidson, J.J. Aubert, B. Badelek, J. Beaufays, C.P. Bee, C. Benchouk, G. Berghoff, I.G. Bird, D. Blum, E. Böhm, X. De Bouard, F.W. Brasse, H. Braun, C. Broll, S.C. Brown, H. Brück, H. Calen, J.S. Chima, J. Ciborowski, R. Clifft, G. Coignet, F. Combley, J. Coughlan, G. D'Agostini, S. Dahlgren, F. Dengler, I. Derado, T. Dreyer, J. Drees, M. Düren, V. Eckardt, A. Edwards, M. Edwards, T. Ernst, G. Eszes, J. Favier, M.I. Ferrero, J. Figiel, W. Flauger, J. Foster, E. Gabathuler, J. Gajewski, R. Gamet, J. Gayler, N. Geddes, P. Grafström, F. Grard, J. Haas, E. Hagberg, F.J. Hasert, P. Hayman, P. Heusse, M. Jaffre, A. Jacholkowska, F. Janata, G. Jancso, A.S. Johnson, E.M. Kabuss, G. Kellner, V. Korbel, A. Krüger, J. Krüger, S. Kullander, U. Landgraf, D. Lanske, J. Loken, K. Long, M. Maire, P. Malecki, A. Manz, S. Maselli, W. Mohr, F. Montanet, H.E. Montgomery, E. Nagy, J. Nassalski, P.R. Norton, F.G. Oakham, A.M. Osborne, C. Pascaud, B. Pawlik, P. Payre, C. Peroni, H. Peschel, H. Pessard, J. Pettingale, B. Pietrzyk, B. Poensgen, M. Pötsch, P. Renton, P. Ribarics, K. Rith, E. Rondio, A. Sandacz, M. Scheer, A. Schlagböhmer, H. Schiemann, N. Schmitz, M. Schneegans, M. Scholz, M. Schouten, T. Schröder, K. Schultze, T. Sloan, H.E. Stier, M. Studt, G.N. Taylor, J.M. Thenard, J.C. Thompson, A. De la Torre, J. Toth, L. Urban, W. Wallucks, M. Whalley, S. Wheeler, W.S.C. Williams, S.J. Wimpenny, R. Windmolders, and G. Wolf

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, Muon, Proton, High Energy Physics::Phenomenology, Nuclear Theory, Down quark, Parton, Nuclear physics, Pion, Antiproton, Up quark, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract

A new determination of the u valence quark distribution function in the proton is obtained from the analysis of identified charged pions, kaons, protons and antiprotons produced in muon-proton and muon-deuteron scattering. The comparison with results obtained in inclusive deep inelastic lepton-nucleon scattering provides a further test of the quark-parton model. The u quark fragmentation functions into positive and negative pions, kaons, protons and antiprotons are also measured.

Published
1989

6. Linear focusing of neutrino parents

Author

H. Faissner, F.J. Hasert, V. Dohm, J. von Krogh, and W. Thome

Subjects
Physics, Geometrical optics, business.industry, Linearity, General Medicine, Ellipsoid, Charged particle, law.invention, Lens (optics), Current sheet, Optics, Classical mechanics, law, Neutrino, business, Focus (optics)
Abstract

This paper treats the general problem of focusing charged particles, e.g. neutrino parents, by means of (pulsed) rotationally symmetric current sheets. An exact parametric representation for the particle trajectories is given. The shape of a current sheet is derived which has ideal focusing properties for arbitrary angles. This shape is well approximated by an ellipsoid. The linearity of such an elliptical lens is demonstrated. This lens can be used to focus particles of a wide range of momenta. Elliptical lenses can be combined into lens systems, using the standard methods of geometrical optics.

Published
1975

7. Determination of the neutral to charged current inclusive cross-section ratio for v and interactions in the 'Gargamelle' experiment

Author

J. Sacton, D.C. Cundy, M. Dewit, F.J. Hasert, D. Waldren, J. Blietschau, T.W. Jones, U. Nguyen-Khac, L. Kluberg, H. Weerts, D. Cavalli, D. Lanske, M. Pohl, H. Wachsmuth, C. Pascaud, M. Jaffre, A.M. Lutz, M. Rollier, K. Myklebost, C. Longuemare, K. Schultze, E. Fiorini, J. Morfin, D. Haidt, F.W. Bullock, A.G. Michette, L. Welch, G. Bertrand-Coremans, A. Pullia, Ph. Heusse, L. Jauneau, P. Jobin, A. Aldrovandi, V. Brisson, S. Bonetti, D. Blum, B. Aubert, P. Petiau, L.M. Chounet, W. Van Doninck, B. Degrange, B. Pattison, M. Haguenauer, J.P. Vialle, P. Musset, H. Deden, G. Myatt, W. Krenz, H. Mulkens, F. Romano, and E. Bellotti

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Cross section (physics), Antiparticle, Muon, Antimatter, Gargamelle, Elementary particle, Charged current, Lepton
Published
1977

8. Total cross sections for ve and interactions and search for neutrino oscillations and decay

Author

W. Van Doninck, D. Blum, J.P. Vialle, E. Fiorini, D. Lanske, U. Nguyen-Khac, B. Degrange, P. Musset, J. Blietschau, M. Pohl, C. Pascaud, A. Pullia, H. Deden, D. Haidt, A.M. Lutz, A.G. Michette, J. Sacton, D. Cavalli, A. Blondel, J. Morfin, K. Schultze, M. Dewit, V. Brisson, S. Bonetti, C. Matteuzzi, H. Weerts, H. Schumacher, G. Bertrand-Coremans, T. Francois, F.J. Hasert, B. Pattison, M. Haguenauer, A. Wachsmuth, M. Rollier, B. Aubert, P. Petiau, F.W. Bullock, L. Welch, W. Krenz, H. Mulkens, E. Bellotti, and F. Romano

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Solar neutrino problem, Nuclear physics, Gargamelle, Measurements of neutrino speed, High Energy Physics::Experiment, Muon neutrino, Neutrino, Neutrino oscillation, Electron neutrino, Lepton
Abstract

About 200 and 60 candidates for electron neutrino and antineutrino interactions, respectively, have been analyzed in the heavy liquid bubble chamber Gargamelle exposed to the CERN PS neutrino beam. Evidence for scaling has been found for these interactions, with slopes of the cross sections in good agreement with those obtained for muon neutrino and antineutrino events in the same chamber. No evidence appears for oscillations of neutrinos or antineutrinos, which would induce in the present experiment an excess of electron or positron events. The corresponding limits are given as functions of the mixing parameter, for the finite mass Majorana neutrinos. The possibility of a multiplicative law for the lepton number has also been investigated. A search for isolated electron-positron pairs revealed no excess in the forward direction, in contradiction to the expectation for muonic neutrino and antineutrino decays. The corresponding limits on the c.m. half lifetimes are given.

Published
1978

9. Jet production and fragmentation properties in deep inelastic muon scattering

Author

P. Payre, M. Pötsch, M. I. Ferrero, F. Janata, G. Jancso, B. Pietrzyk, E. Gabathuler, A. Sandacz, M. Scheer, T. Ernst, B. Badelek, J. Drees, Stephen Wimpenny, K. Rith, P. B. Renton, M. Whalley, C. P. Bee, A. Schlabböhmer, P. Malecki, A. de la Torre, H. Brück, V. Korbel, J. Gajewski, C. Benchouk, M. Studt, K. Long, E. Böhm, T. Schröder, F. G. Oakham, H. E. Stier, F. Montanet, C. Broll, Jc Thompson, H. Peschel, A. Jacholkowska, J. Favier, L. Urban, Ulrich Landgraf, F. W. Brasse, G. Berghoff, J. Krüger, R. Gamet, A. S. Johnson, A.M. Osborne, W.S.C. Williams, J. Pettingale, F. Combley, G. Kellner, Sven Kullander, M. Maire, J. Ftáčnik, H. Schiemann, K. Schultze, D. Lanske, H.E. Montgomery, J. Gayler, Jozsef Toth, H. Pessard, G. D'Agostini, D. Blum, M. Drobnitzki, Karl Ziemons, J. S. Chima, Uwe Pietrzyk, J. Foster, A. Edwards, S.C. Brown, M. Edwards, Michele Arneodo, S. Wheeler, P.J. Hayman, J. Nassalski, J.M. Thenard, E. Rondio, H. M. Braun, B. Pönsgen, E. M. Kabuss, T. J. Sloan, P. R. Norton, M. Jaffré, W. Flauger, F.J. Hasert, J. G. Loken, A. Krüger, Roland Windmolders, N. Geddes, Norbert Schmitz, A. Arvidson, Michael Düren, C. Peroni, J. Figiel, P. Ribarics, E. Hagberg, M. Scholz, E. Nagy, M. Schneegans, G. Eszes, J. J. Aubert, W. Wallucks, S. Dahlgren, R. W. Clifft, A. Manz, Janet Conrad, Jane Coughlan, V. Eckardt, F. Dengler, B. Pawlik, Silvia Maselli, C. Pascaud, Hans Calén, I. G. Bird, G. Coignet, J. Beaufays, Ph. Heusse, I. Derado, W. Mohr, F. Grard, Gy. Wolf, P. Grafström, X. De Bouard, Jacek Ciborowski, Geoffrey Taylor, T. Dreyer, and J. Haas

Subjects
Physics, Quantum chromodynamics, Particle physics, Physics and Astronomy (miscellaneous), Lund string model, Elementary particle, Parton, Inelastic scattering, Deep inelastic scattering, Gluon, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Parton shower, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Results are presented from a study of deep inelastic 280 GeV muon-nucleon interactions on the transverse momenta and jet properties of the final state hadrons. The results are analysed in a way which attempts to separate the contributions of hard and soft QCD effects from those that arise from the fragmentation process. The fragmentation models with which the data are compared are the Lund string model, the independent jet model, the QCD parton shower model including soft gluon interference effects, and the firestring model. The discrimination between these models is discussed. Various methods of analysis of the data in terms of hard QCD processes are presented. From a study of the properties of the jet profiles a value of αs, to leading order, is determined using the Lund string model, namely αs=0.29±0.01 (stat.) ±0.02 (syst.), forQ2∼20 GeV2.

Published
1987

10. Evidence for the leptonic neutral current reaction

Author

M. Jaffre, M. Haguenauer, D. Pittuck, M. Dewitt, C. Pascaud, J. Sacton, A.M. Lutz, D. Haidt, G. Myatt, D. Lanske, D.H. Perkins, P. Musset, J. Morfin, E. Bellotti, D. Blum, A.G. Michette, W. Krenz, G. Bertrand-Coremans, E. Fiorini, K. Schultze, J.B.M. Pattison, C. Longuemare, F.J. Hasert, F.W. Bullock, L. Welch, H. Mulkens, M. Pohl, A. Pullia, M. Rollier, F. Romano, D. Cavalli, B. Aubert, H. Faissner, H. Deden, P. Petiau, U. Nguyen Khac, D.C. Cundy, M.J. Esten, I. Danilchenko, Ph. Heusse, L. Kluberg, V. Brisson, S. Bonetti, H. Weerts, W. Van Doninck, J.P. Vialle, James Pinfold, L.M. Chounet, L. Jauneau, K. Myklebost, J. Blietschau, H. Wachsmuth, B. Degrange, and T.W. Jones

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Neutral current, Gargamelle, Electron, Neutrino, Recoil electron
Abstract

In the Gargamelle neutrino experiment, three unambiguous candidates for the reaction ν μ + e − → ν μ e − have been observed corresponding to a cross section for a recoil electron energy within the range 0.3 e − GeV of 0.06 × 10 −41 E ν ( GeV ) cm 2 / electron . The calculated background is 0.44 ± 0.13 events and the probability that all three candidates could be due to this background is 1%.

Published
1976

11. Transverse momentum of hadrons produced in ν and interactions on an isoscalar target in BEBC

Author

Christoph Geich-Gimbel, A. Vayaki, H. Saarikko, M. Bloch, M. M. Mobayyen, Luc Pape, I. Butterworth, W. G. Scott, Daniel Vignaud, K. J. Powell, F.J. Hasert, M.E. Mermikides, A. Grant, Keith W. J. Barnham, J. Morfin, H. Grässler, D. B. Miller, D. Radojicic, O. Skjeggestad, P. Fritze, H. Deden, E. Simopoulou, Reinhard W. Schulte, J. L. Lloyd, P. Grossmann, K. Böckmann, D.C. Cundy, P. Bosetti, T. P. Kokott, J. R. Batley, Donald H. Perkins, J.S. Chima, B. Nellen, P. B. Renton, C. Penfold, B. Saitta, T. Bolognese, E. F. Clayton, B. Tallini, J. Velasco, R. H. Giles, P. O. Hulth, R. Pech, and G. Myatt

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Antiparticle, Muon, Isoscalar, Nuclear Theory, Hadron, Elementary particle, Fermion, Nuclear physics, Antimatter, High Energy Physics::Experiment, Nuclear Experiment, Lepton
Abstract

The average transverse momentum squared, 〈p⊥2〉, of hadrons is studied as a function of W2 and of Q2 for ν and ν interactions on an isoscalar target. An increase of 〈p⊥2〉 with W2 is observed for the hadrons emitted forward in the hadronic c.m.s. The p⊥ dependence of the fragmentation function is found to factorise from the structure function at fixed W, but does not factorise at fixed Q2. Unlike the case of forward-going particles, the 〈p⊥2〉 of hadrons going backward in the c.m.s. shows no strong dependence on W2.

Published
1981

12. Measurement of hadron azimuthal distributions in deep inelastic muon proton scattering

Author

A. S. Johnson, Stephen Wimpenny, T. Schröder, J. Gajewski, J. Foster, S. Wheeler, B. Pietrzyk, S.C. Brown, Kr Long, F. Combley, M. Whalley, M. Scheer, C. Broll, H.E. Montgomery, Joshua Thompson, A. Sandacz, J. Nassalski, B. Pönsgen, M. Maire, N. Geddes, D. Blum, M. Schneegans, M. Pötsch, W. Flauger, J. Gayler, E. Nagy, G. D'Agostini, G. Jancso, H. Pessard, V. Korbel, S. Dahlgren, J. Drees, G. Eszes, Ulrich Landgraf, V. Eckardt, J. G. Loken, F.J. Hasert, P. B. Renton, J. Beaufays, Gy. Wolf, R. W. Clifft, Janet Conrad, J. Favier, C. P. Bee, N. Pavel, Jozsef Toth, F. Grard, H. M. Braun, Ph. Heusse, J. J. Aubert, A. de la Torre, M. Studt, F.W. Brasse, P. Malecki, E. M. Kabuss, B. Pawlik, R. Gamet, X. De Bouard, Silvia Maselli, Geoffrey Taylor, E. Rondio, H. Schiemann, P. Ribarics, C. Pascaud, T. Dreyer, J. Figiel, N. Schmitz, C. Benchouk, A. Schlagböhmer, J. Krüger, Jane Coughlan, G. Kellner, K. Schultze, M.I. Ferrero, M. Jaffre, F. G. Oakham, E. Hagberg, H. E. Stier, W. Wallucks, P. Grafström, W.S.C. Williams, Michele Arneodo, D. Lanske, G. Berghoff, H. Peschel, A. W. Edwards, A.M. Osborne, S. Kullander, J. Haas, E. Böhm, J.M. Thenard, A. Manz, T. J. Sloan, I. Derado, P. R. Norton, W. Mohr, M. C. Edwards, Hans Calén, A. Jacholkowska, F. Montanet, I. G. Bird, Cristiana Peroni, G. Coignet, Roland Windmolders, J. Pettingale, A. Arvidson, Michael Düren, P.J. Hayman, M. Scholz, K. Rith, H. Brück, F. Dengler, J. S. Chima, F. Janata, P. Payre, E. Gabathuler, T. Ernst, B. Badelek, J. Ciborowski, and L. Urban

Subjects
Quark, Quantum chromodynamics, Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Scattering, Hadron, Virtual particle, Momentum, Nuclear physics, Transverse plane, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

A study of the distribution of the azimuthal angle ϕ of charged hadrons in deep inelastic μ−p scattering is presented. The dependence of the moments of this distribution on the Feynmanx variable and the momentum transverse to the virtual photon indicates that non-zero moments arise mainly from the effects of the intrinsicK T of the struck quark with >≳(0.44 GeV)2, and to a lesser extent from QCD processes. No significant variation withQ 2 orW 2 is observed.

Published
1987

13. Proton and antiproton production in deep inelastic muon-nucleon scattering at 280 GeV

Author

A. Manz, Jane Coughlan, M. Jaffre, V. Eckardt, E. Böhm, G. Kellner, P. B. Renton, J. Ciborowski, L. Urban, Michele Arneodo, J. Krüger, F. Janata, P. Payre, A. W. Edwards, F. Combley, M. Maire, A.M. Osborne, S. Kullander, B. Poensgen, J.M. Thenard, J. G. Loken, T. J. Sloan, J. Favier, P. R. Norton, W. Flauger, H. Pessard, F.J. Hasert, A. Jacholkowska, M. C. Edwards, J. Pettingale, S. Wheeler, P. Ribarics, J. Drees, M.I. Ferrero, J. Nassalski, C. Pascaud, G. Jansco, J. Beaufays, E. Gabathuler, C. Benchouk, E. M. Kabuss, W. Wallucks, T. Ernst, H. E. Stier, B. Badelek, A. S. Johnson, Ph. Heusse, G. Eszes, E. Rondio, Cristiana Peroni, Roland Windmolders, B. Pawlik, H. Peschel, R. Gamet, I. Derado, M. Scheer, W. Mohr, J. J. Aubert, A. Arvidson, F. Dengler, S. Maselli, Michael Düren, T. Schröder, M. Whalley, A. Schlagböhmer, J. S. Chima, H. Schiemann, S.C. Brown, M. Schouten, K. Schultze, C. Broll, D. Lanske, E. Hagberg, H.E. Montgomery, Ulrich Landgraf, Kr Long, Stephen Wimpenny, X. De Bouard, F. Grard, G. Berghoff, J. Foster, J. Gayler, A. de la Torre, D. Blum, M. Scholz, M. Studt, P.J. Hayman, K. Rith, A. Sandacz, A. Krüger, N. Geddes, V. Korbel, W.S.C. Williams, J. Figiel, F.W. Brasse, Gy. Wolf, N. Schmitz, Geoffrey Taylor, F. G. Oakham, T. Dreyer, E. Nagy, F. Montanet, J. Haas, S. Dahlgren, H. M. Braun, R. W. Clifft, J. Gajewski, B. Pietrzyk, Joshua Thompson, M. Schneegans, G. D'Agostini, Jozsef Toth, H. Brück, P. Grafström, M. Pötsch, C. P. Bee, P. Malecki, Hans Calén, I. G. Bird, and G. Coignet

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Proton, Nuclear Theory, Inelastic scattering, Deep inelastic scattering, Nuclear physics, Pair production, Antiproton, Antimatter, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

New results on proton and antiproton production in the target and current fragmentation regions of high energy muon-nucleon scattering are presented. Proton and antiproton production is investigated as a function of Feynmanx and rapidity. No significant difference is observed between production on hydrogen and deuterium targets. Correlations betweenpp,\(p\bar p\) and\(\bar p\bar p\) pairs are analysed and the results are compared with the predictions of the Lund fragmentation model.

Published
1987

14. High energy electronic neutrino (ve) and antineutrino () interactions

Author

V. Brisson, P. Musset, M.J. Esten, C. Franzinetti, E. Fiorini, Pierre Vilain, Donatella Cavalli, F. W. Bullock, James Pinfold, M. Jaffre, H. Wachsmuth, B. Degrange, D. Haidt, D. Lanske, E. Bellotti, A. Pullia, S. Natali, D.C. Cundy, J. Mc Kenzie, F.J. Hasert, L. Kluberg, H. Weerts, C. Conta, G. Bertrand-Coremans, U. Nguyen-Khac, L.M. Chounet, J. von Krogh, Ph. Heusse, Jean Sacton, W. Venus, M. Haguenauer, T.W. Jones, D.H. Perkins, H. Deden, A.M. Lutz, B. Aubert, P. Petiau, J. Morfin, G. Kalbfleisch, J.B.M. Pattison, M. Rollier, T. Eichten, S. Bonetti, G. Myatt, W. Krenz, W. Van Doninck, J.P. Vialle, and A. Rousset

Subjects
Physics, Nuclear and High Energy Physics, Conservation law, High energy, Muon, Scattering, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear physics, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Lepton
Abstract

The total cross-sections for v e ( v e ) -nucleon scattering have been measured. A test has been made of the muon number conservation law. A limit of 2.4 GeV is found the mass of the “Georgi-Glashow type” heavy lepton

Published
1973

15. Upper limit to the cross-section for the process νμ + e− → νμ + e−

Author

Ph. Heusse, M. Dewitt, V. Brisson, S. Bonetti, A.G. Michette, M. Jaffre, C. Longuemare, A.M. Lutz, I. Danilchenko, B. Degrange, J. Blietschau, P. Musset, J. Morfin, J. Sacton, F.J. Hasert, James Pinfold, F.W. Bullock, L. Welch, T.W. Jones, H. Wachsmuth, U. Nguyen Khac, G. Bertrand-Coremans, F. Romano, A. Blondel, K. Myklebost, H. Deden, C. Pascaud, A. Pullia, K. Schultze, D. Blum, L.M. Chounet, E. Fiorini, D. Cavalli, E. Bellotti, W. Van Doninck, J.P. Vialle, G. Myatt, W. Krenz, B. Aubert, P. Petiau, J.B.M. Pattison, M. Rollier, and H. Mulkens

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Electron, Neutrino beam, Recoil energy, Nuclear physics, Cross section (physics), Gargamelle, High Energy Physics::Experiment, Limit (mathematics), Event (particle physics)
Abstract

An upper limit of 3 × 10−42 Eν cm2 per electron, at 90% confidence level, has been obtained for the cross section of the process νμ + e− → νμ + e−, interpreted in the usual V-A framework, for an electron recoil energy larger than 0.3 GeV. This estimate is based on the observation of one candidate event in exposures of Gargamelle to the CERN PS neutrino beam.

Published
1978

16. Measurement of hadronic azimuthal distributions in deep inelastic muon proton scattering

Author

A. S. Johnson, F.J. Hasert, G. Berghoff, S.C. Brown, B. Pietrzyk, F. Dengler, Joshua Thompson, E. Böhm, J. S. Chima, J. Favier, M. Scheer, M.I. Ferrero, M. Pötsch, E. Nagy, P. B. Renton, S. Dahlgren, J. Gajewski, J. G. Loken, Gy. Wolf, G. Kellner, M. Schneegans, G. D'Agostini, Ulrich Landgraf, C. P. Bee, Geoffrey Taylor, H. Brück, P. Malecki, Silvia Maselli, F. Janata, P. Payre, T. Dreyer, C. Pascaud, H. M. Braun, M. Jaffre, Jozsef Toth, T. Schröder, R. W. Clifft, F.W. Brasse, Janet Conrad, R. Gamet, J. Haas, M. C. Edwards, H. Pessard, Kr Long, J. Beaufays, P. Grafström, J. Foster, F. Montanet, Ph. Heusse, D. Blum, W.S.C. Williams, P.J. Hayman, Hans Calén, J. J. Aubert, Stephen Wimpenny, H. Schiemann, E. M. Kabuss, N. Geddes, I. G. Bird, Cristiana Peroni, Roland Windmolders, J. Drees, G. Coignet, H. E. Stier, A. Arvidson, K. Schultze, Michael Düren, H. Peschel, C. Benchouk, X. De Bouard, D. Lanske, V. Eckardt, E. Gabathuler, A. Sandacz, B. Pawlik, M. Scholz, W. Wallucks, E. Rondio, T. Ernst, B. Badelek, A. de la Torre, M. Studt, F. Combley, M. Maire, N. Schmitz, G. Jancso, J. Krüger, A.M. Osborne, S. Kullander, T. J. Sloan, P. Ribarics, E. Hagberg, J. Ciborowski, L. Urban, K. Rith, Jane Coughlan, M. Whalley, A. Jacholkowska, J. Pettingale, V. Korbel, A. Manz, N. Pavel, G. Eszes, S. Wheeler, J. Nassalski, B. Pönsgen, J. Figiel, F. G. Oakham, C. Broll, H.E. Montgomery, J. Gayler, Michele Arneodo, A. W. Edwards, J.M. Thenard, P. R. Norton, A. Schlagböhmer, F. Grard, I. Derado, W. Mohr, W. Flauger, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-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), EMC, and BOMBAR, Claudine

Subjects
Quark, Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, Virtual particle, Elementary particle, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Particle Physics - Experiment
Abstract

A study of the distribution of the azimuthal angle ϕ of charged hadrons in deep inelastic μ−p scattering is presented. The dependence of the moments of this distribution on the Feynmanx variable and the momentum transverse to the virtual photon indicates that non-zero moments arise mainly from the effects of the intrinsicKT of the struck quark with >≳(0.44 GeV)2, and to a lesser extent from QCD processes. No significant variation withQ2 orW2 is observed.

Published
1983

17. Strange particle production and charmed particle search in the Gargamelle neutrino experiment

Author

M. Haguenauer, H. Burmeister, F.J. Hasert, D.H. Perkins, A.M. Lutz, D. Lanske, B. Degrange, J. Morfin, B. Aubert, A. Pullia, P. Petiau, D. Haidt, H. Mulkens, J. Sacton, G. Bertrand-Coremans, J. von Krogh, W. Van Doninck, C. Longuemare, Ph. Heusse, V. Brisson, S. Bonetti, J.P. Vialle, J.B.M. Pattison, F.W. Bullock, T.W. Jones, G. Myatt, M. Goossens, M. Rollier, W. Krenz, U. Nguyen-Khac, D. Cavalli, A. Rousset, D.C. Cundy, C. Pascaud, P. Musset, L. Behr, H. Deden, K. Schultze, Pierre Vilain, A. Lloret, M. Pohl, J. Gandsman, L. Kluberg, H. Weerts, L.M. Chounet, H. Wachsmuth, James Pinfold, L. Jauneau, A. Comtet, M. Jaffre, F. Romano, E. Bellotti, E. Fiorini, A.G. Michette, Institut de Physique Nucléaire d'Orsay (IPNO), 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 Robert, Suzanne

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Strange quark, Neutral current, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Solar neutrino problem, 01 natural sciences, Nuclear physics, Gargamelle, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Measurements of neutrino speed, High Energy Physics::Experiment, Invariant mass, Neutrino, Nuclear Experiment, 010306 general physics, Neutrino oscillation
Abstract

Data is given for single and multiple strange particle production in neutrino reactions in both charged and neutral current channels. A total of 15000 neutrino and antineutrino events has been examined for possible evidence of semi-leptonic decay of a charmed particle. One candidate has been observed. Upper limits on charmed particle production cross-sections are given as a function of the neutrino energy and the invariant mass of the final state hadrons.

Published
1975

18. Comparison of multiplicity distributions to the negative binomial distribution in muon-proton scattering

Author

Uwe Pietrzyk, E. Böhm, Michele Arneodo, Geoffrey Taylor, A. W. Edwards, F. Combley, T. Dreyer, H. Brück, J.M. Thenard, M. Maire, Roland Windmolders, V. Eckhard, F. G. Oakham, H. Schiemann, Hans Calén, H. E. Stier, Norbert Schmitz, G. Kellner, Sven Kullander, L. Urban, A. Arvidson, P. R. Norton, S. Maselli, Michael Düren, K. Schultze, H. Peschel, D. Lanske, F.J. Hasert, A. Manz, M. Whalley, C. Peroni, J. Favier, M. Scholz, G. D'Agostini, J. Ftáčnik, A. de la Torre, V. Korbel, I. G. Bird, F. Montanet, P. Grafström, M. Studt, M. Schneegans, H. Pessard, J. Krüger, G. Coignet, Adam C. Schneider, G. Eszes, J. Beaufays, A.M. Osborne, A. Schlagböhmer, C. Benchouk, A. S. Johnson, P.J. Hayman, Ph. Heusse, P. B. Renton, C. Broll, F.W. Brasse, Jane Coughlan, H.E. Montgomery, M. Pötsch, J. Gayler, Jozsef Toth, M. Edwards, S.C. Brown, J. C. Thompson, R. Gamet, C. P. Bee, P. Malecki, E. M. Kabuss, P. Ribarics, K. Rith, E. Gabathuler, W. Wallucks, T. J. Sloan, T. Ernst, A. Jacholkowska, B. Badelek, J. Drees, W.S.C. Williams, J. Foster, S. Wheeler, J. Nassalski, B. Pönsgen, M. Jaffré, J. Figiel, N. Geddes, G. Berghoff, G. Jancso, Stephen Wimpenny, M. Scheer, K. Long, Ulrich Landgraf, B. Pietrzyk, J. Pettinghale, A. Sandacz, C. Pascaud, E. Nagy, S. Dahlgren, R. W. Clifft, B. Pawlik, J. S. Chima, E. Rondio, E. Hagberg, F. Grard, W. Flauger, I. Derado, W. Mohr, H. M. Braun, J. Gajewski, J. G. Loken, M. I. Ferrero, F. Janata, P. Payre, T. Schröder, D. Blum, F. Dengler, J. Haas, Gy. Wolf, J. J. Aubert, X. De Bouard, and Jacek Ciborowski

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Scattering, Hadron, Negative binomial distribution, Parameterized complexity, Multiplicity (mathematics), Nuclear physics, Proton scattering, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

The multiplicity distributions of charged hadrons produced in the deep inelastic muon-proton scattering at 280 GeV are analysed in various rapidity intervals, as a function of the total hadronic centre of mass energy W ranging from 4–20 GeV. Multiplicity distributions for the backward and forward hemispheres are also analysed separately. The data can be well parameterized by binomial distributions, extending their range of applicability to the case of lepton-proton scattering. The energy and the rapidity dependence of the parameters is presented and a smooth transition from the negative binomial distribution via Poissonian to the ordinary binomial is observed.

Published
1987

19. Multiplicities of charged hadrons in 280 GeV/c muon-proton scattering

Author

M. Arneodo, A. Arvidson, J.J. Aubert, B. Badelek, J. Beaufays, K.H. Becks, C.P. Bee, C. Benchouk, G. Berghoff, I. Bird, D. Blum, E. Böhm, X. De Bouard, F.W. Brasse, H. Braun, C. Broll, S. Brown, H. Brück, H. Calen, D. Callebaut, J.S. Chima, J. Ciborowski, R. Clifft, G. Coignet, F. Combley, J. Coughlan, G. D'Agostini, S. Dahlgren, F. Dengler, I. Derado, T. Dreyer, J. Drees, M. Düren, V. Eckardt, A. Edwards, M. Edwards, T. Ernst, G. Eszes, J. Favier, M.I. Ferrero, J. Figiel, W. Flauger, J. Foster, E. Gabathuler, J. Gajewski, R. Gamet, J. Gayler, N. Geddes, P. Giubellino, P. Grafström, F. Grard, J. Hass, E. Hagberg, F.J. Hasert, P. Hayman, P. Heusse, C. Hoppe, M. Jaffré, A. Jacholkowska, F. Janata, G. Jancso, A.S. Johnson, E.M. Kabuss, G. Kellner, J. Kesteman, V. Korbel, J. Krüger, S. Kullander, U. Landgraf, D. Lanske, J. Loken, K. Long, M. Maire, A. Manz, W. Mohr, F. Montanet, H.E. Montgomery, E. Nagy, J. Nassalski, P.R. Norton, F.G. Oakham, A.M. Osborne, C. Pascaud, B. Pawlik, P. Payre, C. Peroni, H. Pessard, J. Pettingale, B. Pietrzyk, B. Pönsgen, M. Pötsch, P. Renton, P. Ribarics, K. Rith, E. Rondio, M. Scheer, A. Schlagböhmer, H. Schiemann, N. Schmitz, M. Schneegans, T. Schröder, M. Schouten, K. Schultze, M. Sholz, T. Sloan, H.E. Stier, W. Stockhausen, M. Studt, G.N. Taylor, J.M. Thénard, J.C. Thompson, A. De La Torre, J. Toth, L. Urban, H. Wahlen, W. Wallucks, M. Whalley, S. Wheeler, W.S.C. Williams, S.J. Wimpenny, R. Windmolders, G. Wolf, 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 d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-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), EMC, Starita, Sabine, and 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)

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Hadron, Multiplicity (mathematics), 01 natural sciences, Lower energy, Nuclear physics, Proton scattering, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Energy variation, Angular dependence, 010306 general physics, Particle Physics - Experiment
Abstract

Properties of the hadron multiplicity distributions in 280 GeV/c μ+p interactions have been investigated. The c.m. energy dependence in the range from 4 to 20 GeV of the total charged multiplicities are presented. No variation faster than logarithmic is seen in the energy range of this experiment. Comparison with νp and νp data at lower energy has been made and shows good agreement between μ+p and νp total charged multiplicities. It has been found that the average forward multiplicity (charged hadrons with xF > 0) exceeds the average backward multiplicity (charged hadrons with xF < 0) in the whole energy range and presents a different energy variation. The average forward multiplicity has been compared to e+e− data and shows a similar dependence on energy. Little correlation was observed between the forward and backward multiplicities indicating that the current and target regions fragment almost independently.

Published
1985

20. Hadron Multiplicity Variation With Q2 and Scale Breaking of the Hadron Distributions In Deep Inelastic Muon-proton Scattering

Author

M. Arneodo, A. Arvidson, J.J. Aubert, B. Badelek, J. Beaufays, C.P. Bee, C. Benchouk, G. Berghoff, I. Bird, D. Blum, E. Böhm, X. de Bouard, F.W. Brasse, H. Braun, C. Broll, S. Brown, H. Brück, H. Calen, J.S. Chima, J. Ciborowski, R. Clifft, G. Coignet, F. Combley, J. Coughlan, G. D'Agostini, S. Dahlgren, F. Dengler, I. Derado, T. Dreyer, J. Drees, M. Düren, V. Eckardt, A. Edwards, M. Edwards, T. Ernst, G. Eszes, J. Favier, M.I. Ferrero, J. Figiel, W. Flauger, J. Foster, E. Gabathuler, J. Gajewski, R. Gamet, J. Gayler, N. Geddes, P. Giubellino, P. Grafström, F. Grard, J. Haas, E. Hagberg, K. Hamacher, F.J. Hasert, P. Hayman, P. Heusse, M. Jaffré, A. Jacholkowska, F. Janata, G. Jancso, A.S. Johnson, E.M. Kabuss, G. Kellner, V. Korbel, B. Korzen, J. Krüger, S. Kullander, U. Landgraf, D. Lanske, J. Loken, K. Long, P. Malecki, M. Maire, A. Manz, S. Maselli, W. Mohr, F. Montanet, H.E. Montgomery, E. Nagy, J. Nassalski, P.R. Norton, F.G. Oakham, A.M. Osborne, C. Pascaud, B. Pawlik, P. Payre, C. Peroni, H. Peschel, H. Pessard, J. Pettingale, B. Pietrzyk, U. Pietrzyk, B. Pönsgen, M. Pötsch, H. Preissner, P. Renton, P. Ribarics, K. Rith, E. Rondio, M. Scheer, A. Schlagböhmer, H. Schiemann, N. Schmitz, M. Schneegans, A. Schneider, M. Sholz, T. Schröder, M. Schouten, K. Schultze, T. Sloan, H.E. Stier, W. Stockhausen, M. Studt, G.N. Taylor, J.M. Thénard, J.C. Thompson, A. de la Torre, J. Toth, L. Urban, W. Wallucks, M. Whalley, S. Wheeler, W.S.C. Williams, S.J. Wimpenny, R. Windmolders, and G. Wolf

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Scattering, High Energy Physics::Phenomenology, Hadron, Inelastic scattering, Deep inelastic scattering, Charged particle, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract

Measurements are presented of the variation with Q 2 (scaling violation) of the hadron multiplicity in deep inelastic muon-proton scattering. An increase in the average multiplicity of both the charged hadrons and K 0 mesons is observed with increasing Q 2 or x Bj for fixed centre-of-mass energy W . The study of the shape of the effective fragmentation function D h ( z , W , Q 2 ) shows that the increase of the particle yield with Q 2 takes place for low z particles. The variation of the hadron distributions with Q 2 is also studied in the current fragmentation region where a decrease in multiplicity is observed. Such effects are expected from QCD.

Published
1985

21. Neutral pion production by weak neutral currents in neutrino and antineutrino reactions

Author

B. Aubert, P. Petiau, M. Jaffre, A. Pullia, D. Lanske, H. Mulkens, F.J. Hasert, C. Pascaud, J. Sacton, L. Behr, H. Wachsmuth, J.B.M. Pattison, K. Schultze, G.H.B. Coremans, B. Degrange, A.G. Michette, L. Kluberg, T.W. Jones, H. Weerts, L.M. Chounet, G. Myatt, A.J. Segar, F.W. Bullock, P. Musset, J. Gandsman, M. Rollier, C. Longuemare, D. Haidt, M. Haguenauer, A. Rousset, A.M. Lutz, W. Krenz, A. Orkin-Lecourtois, J. Morfin, A. Comtet, D.C. Cundy, J. von Krogh, Ph. Heusse, V. Brisson, U. Nguyen-Khac, S. Bonetti, L. Jauneau, W. Van Doninck, J.P. Vialle, D. Cavalli, E. Fiorini, D. Blum, F. Romano, E. Bellotti, A. Norton, Institut de Physique Nucléaire d'Orsay (IPNO), 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 Robert, Suzanne

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Freon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, 01 natural sciences, Nuclear physics, Pion, Gargamelle, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Production (computer science), Neutrino, 010306 general physics, Charged current
Abstract

A study is presented of single πo production in neutrino and antineutrino interactions in Gargamelle filled with freon CF3Br. Limits on the neutral to charged current cross-section ratios R v =σ(v N →v N ′π o )/2 σ(v N → μ - N ′π o ) and R ν = σ( ν N → ν N ′π o )/2 σ( ν N → ω + N ′π o ) are found to be 0.10 ν and 0.26 ν at 68% confidence level.

Published
1975

22. Dilepton and strange particles production by neutrinos in Gargamelle

Author

D. Blum, P. Van Dam, A.G. Michette, A.M. Lutz, F.J. Hasert, M. Jaffre, D. Lanske, J. Morfin, M. Pohl, H. Deden, C. Pascaud, D. Cavalli, Ph. Heusse, M. Haguenauer, H. Burmeister, V. Brisson, S. Bonetti, K. Myklebost, D. Waldren, A.J. Segar, G. Bertrand-Coremans, D. Haidt, C. Longuemare, K. Schultze, D.H. Perkins, B. Degrange, P. Jobin, T. Francois, M. J. Esten, F.W. Bullock, J. Sacton, L. Welch, E. Bellotti, I. Danilchenko, E. Fiorini, A. Pullia, L. Jauneau, U. Nguyen-Khac, W. Van Doninck, J.P. Vialle, C. Matteuzzi, J.B.M. Pattison, F. Romano, M. Rollier, B. Aubert, P. Petiau, A. Blondel, L.M. Chounet, D. Pittuck, T.W. Jones, P. Musset, G. Myatt, W. Krenz, H. Mulkens, Laboratoire de l'Accélérateur Linéaire (LAL), 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, Nuclear and High Energy Physics, Particle physics, Strange quark, Muon, Neutral current, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, Nuclear physics, Particle decay, Gargamelle, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Particle Physics, Charged current, Lepton
Abstract

New results are presented of an analysis of pictures taken during an exposure of Gargamelle to the CERN ν beam in 1975. In addition to three ν μ +N→ μ − +e + +V 0 + hadrons events previously reported, an excess is found of events of the type ν μ +N→ μ − +e + + hadrons without V 0 . An analysis of strange particle production in charged current events suggests a possible violation of the ΔS = ΔQ rule. Interpreted in terms of charm production, the data permit an estimate of branching ratios and production rate of charmed particles. A limit is also placed on charmed particle production by neutral currents.

Published
1977

23. Comparison between hadronic final states produced in $\mu p$ and $e^{+}e^{-}$ interactions

Author

B. Pietrzyk, H. M. Braun, Joshua Thompson, M. Whalley, P. B. Renton, M. Schneegans, T. Schröder, J. Gajewski, G. Jancso, Cristiana Peroni, Roland Windmolders, N. I. Geddes, F.J. Hasert, G. D'Agostini, F. Montanet, A. Arvidson, Kr Long, E. Nagy, W.S.C. Williams, S. Maselli, Michael Düren, S. Dahlgren, C. Benchouk, A. S. Johnson, Jozsef Toth, F. Dengler, M. Scholz, K. Rith, A. Schlagböhmer, D. Blum, E. Böhm, V. Korbel, J. S. Chima, R. W. Clifft, H. Pessard, J. Drees, C. Broll, H.E. Montgomery, J. Beaufays, J. Gayler, B. Pawlik, I. Derado, P. Grafström, J. Figiel, E. Rondio, E. M. Kabuss, Ph. Heusse, S.C. Brown, W. Mohr, J. Krüger, Michele Arneodo, F. G. Oakham, J. G. Loken, F. Combley, M. Maire, A.M. Osborne, S. Kullander, H. Schiemann, A. W. Edwards, Stephen Wimpenny, F. Janata, P. Payre, M. Pötsch, T. J. Sloan, J.M. Thenard, P. R. Norton, K. Schultze, D. Lanske, Hans Calén, P. Ribarics, A. Manz, A. Jacholkowska, P. Malecki, S. Wheeler, J. Nassalski, A. Sandacz, B. Pönsgen, J. Pettingale, G. Eszes, W. Flauger, N. Schmitz, I. G. Bird, G. Coignet, M. Jaffre, E. Hagberg, H. E. Stier, F. Grard, H. Peschel, Jane Coughlan, M. C. Edwards, J. Favier, V. Eckardt, J. Ciborowski, L. Urban, C. Pascaud, G. Berghoff, E. Gabathuler, T. Ernst, B. Badelek, M. Scheer, Gy. Wolf, M. Schouten, Ulrich Landgraf, J. J. Aubert, H. Brück, X. De Bouard, Geoffrey Taylor, T. Dreyer, J. Haas, A. de la Torre, M. Studt, R. Gamet, G. Kellner, F.W. Brasse, Christopher Bee, P.J. Hayman, M.I. Ferrero, J. Foster, and W. Wallucks

Subjects
Quantum chromodynamics, Quark, Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Electron–positron annihilation, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Parton, Elementary particle, Nuclear physics, High Energy Physics::Experiment, Quantum field theory, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

A comparison is made between the properties of the final state hadrons produced in 280 GeV μp interactions and ine+e− annihilation. The Lund model of hadroproduction is used as an aid in understanding the differences observed. The hadron distributions from μp ande+e− interactions are consistent with the quark parton model assumption of environmental independence, provided that the differences in heavy quark production and hard QCD effects in the two processes are taken into account. A comparison with aK+p experiment is also made. Values are also determined for the Lund model parameters σq = 0.410 ± 0.002 ± 0.020 GeV and σ′ = 0.29 −0.15 −0.13 +0.09+0.10 GeV, controlling the transverse momenta in fragmentation and intrinsic transverse momenta of the struck quark respectively.

Published
1986

24. Quark charge retention in final state hadrons from deep inelastic muon scattering

Author

H. E. Stier, Claus Goessling, C. Broll, Ph. Heusse, F. W. Brasse, M. Jaffre, F. Dengler, Cristiana Peroni, Roland Windmolders, C. Hoppe, H.E. Montgomery, J. Shiers, Hans Calén, A. Arvidson, F. G. Oakham, J.J. Dumont, J. Gayler, N. Schmitz, K. Schultze, I. G. Bird, G. Kellner, Stephen Wimpenny, G. Coignet, D. Lanske, A. S. Johnson, W.S.C. Williams, P. Payre, Jozsef Toth, M. Edwards, F. Janata, P. Zank, E. Nagy, J. Foster, M. Poetsch, Jennifer S. Haas, H. Preissner, S. Dahlgren, L. Urban, H. Pessard, L. Gustafsson, K. Rith, A. Jacholkowska, S.C. Brown, N. Geddes, Ulrich Landgraf, R. W. Clifft, Richard Mount, V. Korbel, E. Rondio, J. G. Loken, Paolo Giubellino, E. M. Kabuss, Christopher Bee, I. Derado, J. Favier, F. Combley, M. Maire, J. Pettingale, J.K. Davies, P. B. Renton, W. Flauger, C. Benchouk, F. Montanet, D. Blum, Jane Coughlan, J. S. Chima, M.I. Ferrero, C. Pascaud, W. Mohr, K.H. Becks, M. Dueren, W. Stockhausen, Michele Arneodo, H. Wahlen, H. Brueck, Jc Thompson, F.J. Hasert, J.M. Thenard, M. Schneegans, A.M. Osborne, S. Kullander, B. Poensgen, V. Eckardt, T. J. Sloan, P. Ribarics, T. Schroeder, P. R. Norton, W. Wallucks, Kr Long, J.P. Albanese, G. Jancso, J. Carr, T. Ernst, F. Grard, E. Hagberg, J. Krueger, J. Drees, J.H. Cobb, H. M. Braun, M. Whalley, J. J. Aubert, Gy. Wolf, A. Schlagboehmer, G.R. Court, A. Manz, U. Dosseli, X. De Bouard, E. Gabathuler, Geoffrey Taylor, T. Dreyer, L. Paul, J. Figiel, G. Eszes, S. Wheeler, J. Nassalski, R.W. Dobinson, A. Edwards, P.J. Hayman, D. Callebaut, E. Boehm, W. D. Dau, A. de la Torre, M. Studt, R. Gamet, P. Grafstroem, and G. D'Agostini

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Muon, Valence (chemistry), Scattering, Hadron, High Energy Physics::Phenomenology, Nuclear Theory, Parton, Nuclear physics, Rapidity, High Energy Physics::Experiment, Nuclear Experiment, Charge retention, Particle Physics - Experiment
Abstract

The net charge of final state hadrons in both the current and target fragmentation regions has been measured in 280 GeV/ c muon-proton scattering experiment. A clean kinematic separation of the two regions in the centre-of-mass rapidity is demonstrated. The dependence on x Bj of the mean net charges is found to be consistent with a large contribution of sea quarks at small x Bj and with the dominance of valence quarks at large x Bj thus giving clear confirmation of the quarck- parton model. It is also shown that the lending forward hadron has a high probability of containing the struck quark.

Published
1984

25. Studies of quark and diquark fragmentation into identified hadrons in deep inelastic muon-proton scattering

Author

M. Arneodo, A. Arvidson, J.J. Aubert, B. Badelek, J. Beaufays, K.H. Becks, C. Bee, C. Benchouk, G. Berghoff, I. Bird, D. Blum, E. Böhm, X. de Bouard, F.W. Brasse, H. Braun, C. Broll, S. Brown, H. Brück, H. Calen, D. Callebaut, J. Carr, J.S. Chima, J. Ciborowski, R. Clifft, J.H. Cobb, G. Coignet, F. Combley, J. Coughlan, G.R. Court, G. D'Agostini, S. Dahlgren, J.K. Davies, F. Dengler, I. Derado, U. Dosselli, T. Dreyer, J. Dress, J.J. Dumont, M. Düren, V. Eckardt, A. Edwards, M. Edwards, T. Ernst, G. Eszes, J. Favier, M.I. Ferrero, J. Figiel, W. Flauger, J. Foster, E. Gabathuler, J. Gajewski, R. Gamet, J. Gayler, N. Geddes, P. Giubellino, C. Gössling, P. Grafström, F. Grard, L. Gustafsson, J. Haas, E. Hagberg, F.J. Hasert, P. Hayman, P. Heusse, C. Hoppe, M. Jaffré, A. Jacholkowska, F. Janata, G. Jancso, A.S. Johnson, E.M. Kabuss, G. Kellner, V. Korbel, J. Krüger, S. Kullander, U. Landgraf, D. Lanske, J. Loken, M. Mong, M. Maire, A. Manz, W. Mohr, F. Montanet, H.E. Montgomery, R.P. Mount, E. Nagy, J. Nassalski, P.R. Norton, F.G. Oakham, A.M. Osborne, C. Pascaud, L. Paul, B. Pawlik, P. Payre, C. Peroni, H. Pessard, J. Pettingale, B. Pietrzyk, B. Pönsgen, M. Pötsch, H. Preissner, P. Renton, P. Ribarics, K. Rith, E. Rondio, A. Schlagböhmer, H. Schiemann, N. Schmitz, M. Schneegans, T. Schröder, K. Schultze, J. Shiers, T. Sloan, H.E. Stier, W. Stockhausen, M. Studt, G.N. Taylor, J.M. Thénard, J.C. Thompson, A. de la Torre, J. Toth, L. Urban, H. Wahlen, W. Wallucks, M. Whalley, S. Wheeler, W.S.C. Williams, S. Wimpenny, R. Windmolders, and G. Wolf

Subjects
Physics, Diquark, Quark, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Muon, Fragmentation (mass spectrometry), Proton scattering, Hadron, Transverse momentum, Particle Physics - Experiment
Published
1984

26. Transverse momentum and its compensation in current and target jets in deep inelastic muon-proton scattering

Author

M. Arneodo, A. Arvidson, J.J. Aubert, J. Beaufays, K.H. Becks, C. Bee, C. Benchouk, I. Bird, D. Blum, E. Böhm, X. de Bouard, F.W. Brasse, H. Braun, C. Broll, S. Brown, H. Brück, H. Calen, D. Callebaut, J. Carr, J.S. Chima, R. Clifft, J.H. Cobb, G. Coignet, F. Combley, J. Coughlan, G.R. Court, G. D'Agostini, S. Dahlgren, J.K. Davies, F. Dengler, I. Derado, U. Dosselli, T. Dreyer, J. Drees, J.J. Dumont, M. Düren, V. Eckardt, A. Edwards, M. Edwards, T. Ernst, G. Eszes, J. Favier, M.I. Ferrero, J. Figiel, W. Flauger, J. Foster, E. Gabathuler, R. Gamet, J. Gayler, N. Geddes, P. Giubellino, C. Gössling, P. Grafström, F. Grard, L. Gustafsson, J. Haas, E. Hagberg, F.J. Hasert, P. Hayman, P. Heusse, C. Hoppe, M. Jaffré, A. Jacholkowska, F. Janata, G. Jancso, A.S. Johnson, E.M. Kabuss, G. Kellner, V. Korbel, J. Krüger, S. Kullander, U. Landgraf, D. Lanske, J. Loken, K. Long, M. Maire, A. Manz, W. Mohr, F. Montanet, H.E. Montgomery, R.P. Mount, E. Nagy, J. Nassalski, P.R. Norton, F.G. Oakham, A.M. Osborne, C. Pascaud, L. Paul, B. Pawlik, P. Payre, C. Peroni, H. Pessard, J. Pettingale, B. Pietrzyk, M. Pötsch, H. Preissner, P. Renton, P. Ribarics, K. Rith, E. Rondio, A. Schlagböhmer, N. Schmitz, M. Schneegans, T. Schröder, K. Schultze, J. Shiers, T. Sloan, H.E. Stier, W. Stockhausen, M. Studt, G.N. Taylor, J.M. Thénard, J.C. Thompson, A. de la Torre, J. Toth, L. Urban, H. Wahlen, W. Wallucks, M. Whalley, S. Wheeler, W.S.C. Williams, S. Wimpenny, R. Windmolders, and G. Wolf

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Muon, Nuclear Theory, Virtual particle, Deep inelastic scattering, Gluon, Hadronization, Nuclear physics, Transverse plane, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, Particle Physics - Experiment
Abstract

Results are presented on the transverse momentum distributions of charged hadrons in 280 GeV muon-proton deep inelastic interactions. The transverse momenta are defined relative to the accurately measured virtual photon direction and the experiment has almost complete angular acceptance for the final state hadrons. Significantly larger values of the average transverse momentum squared are found for the forward going hadrons than for the target remnants. This result, combined with a study of the rapidity region over which the transverse momentum is compensated, can be explained by a significant contribution from soft gluon radiation, but not by a large value of the primordial transverse momentum of the struck quark.

Published
1984

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