Search

Your search keyword '"M G, Bowler"' showing total 116 results
Start Over Author "M G, Bowler"
116 results on '"M G, Bowler"'

1. Gravitation and Relativity : International Series in Natural Philosophy

Author

M. G. Bowler, D. ter Haar, M. G. Bowler, and D. ter Haar

Subjects
Gravitation, General relativity (Physics)
Abstract

International Series in Natural Philosophy, Volume 86: Gravitation and Relativity provides information pertinent to the fundamental aspects of the theories of gravitation. This book applies the elementary tools of special relativity to the problem of generalizing Newton's theory of gravitation. Organized into 10 chapters, this volume begins with an overview of the principle of relativity, which asserts theta there is no meaningful way of defining absolute velocity. This text then presents a discussion of the Eötvös–Dicke experiments that established the identity of inertial and gravitational mass. Other chapters consider the equations of electrodynamics derived by starting from the equations of electrostatics. This book discusses as well gravitational redshift, deflection of light, and radar echo delay. The final chapter attempts to establish the connection with general relativity and discusses how black holes may manifest themselves to the astronomer. This book is a valuable resource for physicists and undergraduate students in physics.

Published
2016

2. Neutral current and day night measurements from the pure D2O phase of SNO

Author

B. C. Robertson, J. R. Leslie, M. Dunford, Eric B. Norman, J. B. Wilhelmy, T. Kutter, J. Manor, J. Farine, S. D. Biller, C. W. Nally, T. V. Bullard, A. S. Hamer, D. R. Grant, Guthrie Miller, S. J. Brice, James R. Wilson, E. W. Beier, P. J. Harvey, J. Cameron, C. E. Okada, J. F. Wilkerson, E. D. Hallman, X. Chen, W. J. Heintzelman, S. R. Elliott, R. G. Stokstad, David A. Sinclair, J. A. Formaggio, P. Jagam, Reda Tafirout, Christopher C. M. Kyba, M. W. Smith, C. J. Virtue, Ilan Levine, H. B. Mak, R. G. Van de Water, N. Starinsky, G. Doucas, P. Skensved, G. T. Ewan, K. K. Schaffer, G. A. Cox, K. Kazkaz, M. M. Fowler, F. Dalnoki-Veress, M. G. Bowler, C. K. Hargrove, K. Graham, S. M. Oser, P. T. Keener, S. S.E. Rosendahl, S. Majerus, John L. Orrell, Hal Evans, W. Frati, S. Luoma, B. T. Cleveland, W. B. Handler, D. L. Wark, K. T. Lesko, N. Tagg, E. D. Earle, N. Gagnon, Y.D. Chan, K. M. Heeger, A. Hime, Mark Guy Boulay, X. Dai, J. J. Simpson, R. L. Hahn, R. Hazama, Minfang Yeh, J. A. Dunmore, N. A. Jelley, K. Frame, A. L. Hallin, M. Howe, J. M. Wouters, Peter Wittich, A. B. McDonald, N. McCauley, A. D. Marino, R. Van Berg, H. Fergani, M. L. Chen, I. Lawson, A. J. Noble, Jochen Klein, V. L. Rusu, J. Maneira, A. W. P. Poon, F. A. Duncan, R. G. H. Robertson, M. R. Dragowsky, T. Spreitzer, T.J. Bowles, G. McGregor, Chris Waltham, L. C. Stonehill, R. L. Helmer, M. H. Schwendener, J. Law, C. J. Sims, J. Heise, C. A. Duba, N. West, and P. J. Doe

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, Solar neutrino, Atomic and Molecular Physics, and Optics, Massless particle, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Nuclear Experiment, Charged current, Lepton
Abstract

The Sudbury Neutrino Observatory is a 1000 T D 2 O Cerenkov detector that is sensitive to 8 B solar neutrinos. The energy, radius, and direction with respect to the sun is measured for each neutrino event; these distributions are used to separately determine the rates of the charged current, neutral current and electron scattering reactions of neutrinos on deuterium. Assuming an undistorted 8 B spectrum, the ν e component of the 8 B solar flux is φ e = 1.76 +0.05 −0.05 (stat.) +0.09 −0.09 (syst.) × 10 6 cm −2 s −1 based on events with a measured kinetic enegy above 5 MeV. The non- ν e component is φ μτ = 3.41 +0.45 −0.45 (stat.) +0.48 −0.45 (syst.) × 10 6 cm −2 s −1 , 5.3 σ greater than zero, providing strong evidence for solar ν e flavor transformation. The total flux measured with the NC reaction is φ NC = 5.09 +0.044 −0.43 (stat.) +0.46 −0.43 (syst.) × 10 6 cm −2 s −1 , consistent with solar models. The night minus day rate is 14.0% ± 6.3% +1.5 −1.4 % of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the ν e asymmetry is found to be 7.0% ± 4.9% +1.3 −1.2 %. A global solar neutrino analysis is terms of matter-enhanced oscillations of two active flavors strongly favors the Large Mixing Angle (LMA) solution.

Published
2016

3. DSTAR+/- PRODUCTION BY E+E- ANNIHILATION NEAR 34.4 GEV CM ENERGY

Author

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

Subjects
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.

Published
2016

4. AN IMPROVED MEASUREMENT OF ELECTROWEAK COUPLINGS FROM E+E--]E+E- AND E+E--]MU+MU

Author

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

Subjects
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.

Published
2016

5. Constraints on nucleon decay via invisible modes from the Sudbury Neutrino Observatory

Author

X. Chen, H. Wan Chan Tseung, H. Labranche, D. L. Wark, F. Dalnoki-Veress, A. D. Marino, B. C. Robertson, N. McCauley, R. L. Helmer, G. Doucas, R. Van Berg, R. G. H. Robertson, J. B. Wilhelmy, T. Kutter, M. G. Bowler, I. Levine, M. L. Chen, Monica Dunford, S. S.E. Rosendahl, Chris Waltham, C. J. Virtue, S. J. Brice, A. W. P. Poon, J. A. Dunmore, R. L. Hahn, R. W. Ollerhead, C. W. Nally, G. McGregor, P. Jagam, K.K.S. Miknaitis, J. M. Wouters, S. Majerus, P. Skensved, X. Dai, J. F. Wilkerson, R. G. Van de Water, Joshua R. Klein, N. Gagnon, Reda Tafirout, N. Starinsky, Darren Grant, Alain Bellerive, R. S. Dosanjh, R. Lange, Mark Neubauer, W. Frati, S. N. Ahmed, R. Hazama, E. D. Earle, E. Rollin, W. B. Handler, H. B. Mak, T. J. Bowles, Andrew Hime, J. R. Wilson, Guthrie Miller, M. W.E. Smith, F. A. Duncan, M. A. Howe, A. B. McDonald, Christopher C. M. Kyba, R. MacLellan, M. A. Thomson, J. Heise, S. D. Biller, J. R. Leslie, B. A. Moffat, Bernie G. Nickel, J. Boger, F. Fleurot, M. H. Schwendener, B. T. Cleveland, Malcolm M. Fowler, N. S. Oblath, A. E. Anthony, N. West, A. V. Krumins, C. A. Duba, S. Luoma, Joseph A. Formaggio, C. Ouellet, Minfang Yeh, C. E. Okada, P. J. Harvey, W. J. Heintzelman, S. R. Elliott, O. Simard, David A. Sinclair, G. T. Ewan, I. T. Lawson, G. Tešić, A. L. Hallin, C. Mifflin, S. J. M. Peeters, N. A. Jelley, M. Thorman, D. Waller, V. L. Rusu, J. C. Hall, J. Law, M. R. Dragowsky, G. A. Cox, K. T. Lesko, L. C. Stonehill, J. Farine, C. J. Sims, C. K. Hargrove, A. J. Noble, T. V. Bullard, R. J. Hemingway, Kai Zuber, H. Fergani, J. Maneira, M. Kos, A. S. Hamer, Hal Evans, E. W. Beier, S. McGee, R. G. Stokstad, B. L. Wall, Peter Wittich, Eric B. Norman, E. D. Hallman, P. J. Doe, Y. Takeuchi, J. J. Simpson, Yuen-Dat Chan, K. Graham, S. M. Oser, M.G. Boulay, B. G. Fulsom, K. Frame, K. M. Heeger, and John L. Orrell

Subjects
Physics, Sudbury Neutrino Observatory, Particle physics, Proton, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Gamma ray, FOS: Physical sciences, General Physics and Astronomy, Elementary particle, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Baryon, High Energy Physics - Experiment (hep-ex), Particle decay, 0103 physical sciences, Neutron, High Energy Physics::Experiment, 010306 general physics, Nucleon, Nuclear Experiment
Abstract

Data from the Sudbury Neutrino Observatory have been used to constrain the lifetime for nucleon decay to ``invisible'' modes, such as n -> 3 nu. The analysis was based on a search for gamma-rays from the de-excitation of the residual nucleus that would result from the disappearance of either a proton or neutron from O16. A limit of tau_inv > 2 x 10^{29} years is obtained at 90% confidence for either neutron or proton decay modes. This is about an order of magnitude more stringent than previous constraints on invisible proton decay modes and 400 times more stringent than similar neutron modes., Update includes missing efficiency factor (limits change by factor of 2) Submitted to Physical Review Letters

Published
2016

6. A STUDY OF 3-JET EVENTS IN E+E- ANNIHILATION INTO HADRONS AT 34.6 GEV CM ENERGY

Author

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

Subjects
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.

Published
2016

7. CHARGED PION-PRODUCTION IN E+E- ANNIHILATION AT 14,22 AND 34 GEV CM ENERGY

Author

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

Subjects
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.

Published
2016

8. ON THE ORIGIN OF APPROXIMATE KNO SCALING IN E+E- ANNIHILATION

Author

Philip Burrows and M. G. Bowler

Subjects
Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Hadron, Context (language use), Elementary particle, symbols.namesake, symbols, Feynman diagram, Field theory (psychology), High Energy Physics::Experiment, Quantum field theory, Engineering (miscellaneous), Scaling
Abstract

KNO scaling of the multiplicity distribution in hadronic final states was originally derived as a consequence of Feynman scaling. We show that in iterative models of hadron production in jets, incorporating Feynman scaling, KNO scaling obtains only in the limit when the width of the multiplicity distribution tends to zero. Within the context of the models currently employed to describee + e − annihilation into hadrons, the apparent KNO scaling observed is an accidental consequence of effects which violate Feynman scaling.

Published
2016

9. STRANGE MESON PRODUCTION IN E+E- ANNIHILATION

Author

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

Subjects
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.

Published
2016

10. Angular correlations in γγ→ρ0ρ0 near threshold

Author

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

11. MEASUREMENT OF THE PHOTON STRUCTURE-FUNCTION F2-GAMMA AT Q2 FROM 7 TO 70 (GEV/C)2

Author

W. Wallraff, Philip Bull, C. Jenkins, Rj Cashmore, H. M. Fischer, H. Venkataramania, R. Wedemeyer, Wolfram Dietrich Zeuner, A. Ladage, K. U. Pösnecker, D. Strom, E. Hilger, S. Ritz, A. Montag, G. Baranko, M. Cherney, D. H. Saxon, A. Shapira, J. Thomas, P. J. Dornan, A. Eskreys, L. Labarga, A. Jocksch, P. Mättig, J. Krüger, R. Mir, Michael Dittmar, Georg Zobernig, Walter Dr. Hillen, D. M. Binnie, D. Trines, B. Bock, G. Yekutieli, Giora Mikenberg, H. Hartmann, T. Kracht, P. D. Dauncey, T. Tymieniecka, Fernando Barreiro, M. G. Bowler, Hermann Kolanoski, J. K. Sedgbeer, D. A. Garbutt, K. Gather, R. Gerhards, E. Ros, D. Revel, H. Kück, Boaz Klima, E.E. Ronat, B. Neumann, A. Caldwell, Stephen Lloyd, D. K. Hasell, V. Mertens, Gy. Wolf, Joseph Izen, D. Lueke, M. Takashima, G. P. Heath, G. E. Forden, Hl Krasemann, B. Löhr, U. Karshon, P. Joos, B. Foster, E. Wicklund, E. Lohrmann, D. J. Mellor, Y. Eisenberg, R. Walczak, R.C.E. Devenish, J. Eisenmann, W. Braunschweig, M. Althoff, D. Notz, P. Rosskamp, F. J. Kirschfink, M. Holder, H. Hultschig, John Hart, Sau Lan Wu, G. Poelz, Stephanie Brandt, H. Kowalski, H. U. Martyn, W. G. Jones, D. Su, W. A. T. Wan Abdullah, and E. Bernardi

Subjects
Quantum chromodynamics, Quark, Physics, Particle physics, Photon, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, Hadron, Parton, Electron, Lambda, Photon structure function, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous)
Abstract

We have measured the processe + e −→e + e −+hadrons, where one of the scattered electrons was detected at large angles, withQ 2 ranging from 7 to 70 (VeV/c)2. The photon structure functionF 2 γ (x, Q2) was determined at an averageQ 2 of 23 (GeV/c)2. The measurements were compared to theoretical predictions of the Quark Parton Model and Quantum Chromodynamics. In both models a hadronic part was added. Within the errors the data are in agreement with the QPM using quark masses of 300 MeV/c2 for the light quarks. The data also agree with a QCD calculation including higher order corrections. A fit yielded a $$\Lambda _{\overline {MS} } $$ value of 140 −65 +190 MeV, where the errors include statistical and systematic uncertainties.

Published
2016

12. EVIDENCE FOR DIRECT PHOTONS FROM QUARKS IN ELECTRON-POSITRON ANNIHILATION

Author

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.

Published
2016

13. GLOBAL JET PROPERTIES AT 14-44 GEV CENTER OF MASS-ENERGY IN E+E- ANNIHILATION

Author

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

Subjects
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.

Published
2016

14. COMPARISON OF INCLUSIVE FRACTIONAL MOMENTUM DISTRIBUTIONS OF QUARK AND GLUON JETS PRODUCED IN E+E- ANNIHILATION

Author

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

Subjects
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 .

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

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.

Published
2016

16. Investigations into the origin of the spurious 17 keV neutrino signal observed in35S beta decay

Author

M. G. Bowler and N. A. Jelley

Subjects
Physics, Range (particle radiation), Microprobe, Physics and Astronomy (miscellaneous), Proton, Astrophysics::High Energy Astrophysical Phenomena, Electron, Beta decay, Spectral line, Nuclear physics, Distortion, Atomic physics, Neutrino, Engineering (miscellaneous), Nuclear Physics
Abstract

An exhaustive study has been made of the β spectrum of35S, recorded with a Si(Li) detector. The object was to identify the origin of a distortion in the35S β spectrum some 17 keV below the end point, reported over three years ago and interpreted then as evidence for a 17 keV neutrino. Measurements with different source-detector spacings and with varied collimation have shown that there is a long range curvature in the Kurie plot which is a sensitive function of configuration, but the principal origin of the distortion is energy loss in the35S sources. The35S sources, prepared by chemical adsorption of Ba35SO4 on a gold substrate, are clumped and locally thick. Electrons near the end point lose ∼0.3 keV in the source material and if this is taken into account the spectra are well fitted without any admixture of 17 keV neutrino. The source thickness has been investigated with a proton microprobe and determined from both source tilting and the yield of barium K X-rays; these studies are discussed in detail. The uncertainties in and justification for the form of the electron response function employed are also thoroughly discussed. If there is no systematic error common to the majority of 14 independent sets of35S data, the admixture of 17 keV neutrino is

Published
1995

17. On surprises from Bose-Einstein correlations

Author

M. G. Bowler

Subjects
Physics, Nuclear and High Energy Physics, Work (thermodynamics), Quantum mechanics, Bose–Einstein correlations, String (physics), Quantum
Abstract

Recent theoretical work has shown that there may be differences between π 0 π 0 and π ± π ± correlations and quantum statistical correlations between π + and π − . I discuss the physical origin of such effects and how they may come about in the framework of the string model.

Published
1992

18. Coulomb corrections to Bose-Einstein corrections have greatly exaggerated

Author

M. G. Bowler

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Electron–positron annihilation, Gamow factor, law.invention, Pion, Correlation function, law, Quantum mechanics, Quantum electrodynamics, Coulomb, Wave function, Bose–Einstein condensate
Abstract

The zero range Gamow factor is not a good representation of the effect of Coulomb corrections on measured two particle correlation functions. Better estimates are provided and it is shown that Coulomb corrections are entangled with others. Procedures currently employed result in a substantial overestimate of Coulomb corrections and hence of the magnitude of the Bose-Einstein enhancement.

Published
1991

19. Measurement of the asymmetry ofb quark production ine + e − annihilation at $$\sqrt s = 35 GeV$$

Author

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

20. Experimental study of the orientation of three-jet events ine + e ? annihilation at PETRA

Author

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

22. Determination of theνeand totalB8solar neutrino fluxes using the Sudbury Neutrino Observatory Phase I data set

Author

M. Huang, R. U. Haq, C. B. Krauss, N. S. Oblath, Malcolm M. Fowler, J. Wendland, F. A. Duncan, J. A. Dunmore, H. Fergani, N.W. Tanner, K. Kazkaz, W. B. Handler, R. J. Ford, G. Jonkmans, A. P. Ferraris, J. X. Wang, S. J. M. Peeters, B. Aharmim, M. W.E. Smith, A. S. Hamer, Y. I. Tserkovnyak, J. F. Wilkerson, K. McFarlane, T. J. Walker, R. MacLellan, G. McGregor, G. Prior, M. Bercovitch, J. A. Formaggio, Reda Tafirout, Darren Grant, Benjamin Monreal, C. Jillings, C. A. Duba, B. Jamieson, N. West, Q. R. Ahmad, N. Tagg, E. D. Earle, B. L. Wall, F. Dalnoki-Veress, V. L. Rusu, G. Milton, W. F. Davidson, W. J. Heintzelman, J. Boger, H. W. Lee, P. T. Trent, R. G. Stokstad, C. J. Virtue, R. L. Hahn, H. Mes, Salvador Gil, J. A. Secrest, J. C. Barton, I. T. Lawson, H. S. Ng, T. Tsui, R. J. Boardman, L. C. Stonehill, P. Jagam, J. G. Hykaway, G. A. Cox, J. D. Anglin, Minfang Yeh, K. T. Lesko, M. C.P. Isaac, M. DiMarco, L. L. Kormos, Steven Elliott, F. M. Newcomer, S. D. Reitzner, S. N. Ahmed, Keith Rielage, T. J. Bowles, Monica Dunford, J. Maneira, A. Krüger, R. G. Van de Water, Peter Wittich, J. T.M. Goon, A. W. P. Poon, T. V. Bullard, B. C. Robertson, M. Moorhead, J. Cameron, J. C. Loach, N. A. Jelley, M. Thorman, H. M. O'Keeffe, G. Doucas, Yuen-Dat Chan, R. W. Ollerhead, M. Kos, X. Chen, J. Lyon, J. B. Wilhelmy, K. Graham, S. M. Oser, E. D. Hallman, T. Kutter, R. Meijer Drees, A. Schülke, A. L. Hallin, C. Mifflin, H. Wan Chan Tseung, G. T. Ewan, J. H.M. Cowan, R. K. Taplin, E. W. Beier, John L. Orrell, R. S. Storey, S. D. Biller, H. Labranche, Bernie G. Nickel, M.G. Boulay, D. L. Wark, J. Bigu, B. Morrissette, S. J. Brice, C. Kraus, I. Levine, A. Goldschmidt, P. J. Harvey, N. Tolich, S. S.E. Rosendahl, J. R. Leslie, B. A. Moffat, P. M. Thornewell, A. D. Marino, J. M. Wouters, Hal Evans, M. Lay, Reyco Henning, Y. Takeuchi, C. K. Hargrove, K. K.S. Miknaitis, M. R. Dragowsky, E. Guillian, T. C. Andersen, P. T. Keener, H. B. Mak, A. B. McDonald, H. Seifert, Christopher C. M. Kyba, N. Gagnon, J. J. Simpson, Klaus Kirch, E. Saettler, C. E. Okada, J. D. Hepburn, E. D. Frank, Herbert H. Chen, N. Starinsky, P. J. Doe, M. H. Schwendener, E. Bonvin, David A. Sinclair, S. McGee, J. Heise, F. Fleurot, S. Luoma, R. J. Komar, R. C. Allen, H. Heron, A. Roberge, P. Skensved, H. Deng, D. S. McDonald, D. F. Cowen, J. Law, V. M. Novikov, C. J. Sims, J. V. Germani, I. Blevis, M. Omori, J. Hewett, Andrew Hime, Kai Zuber, C. D. Tunnell, X. Dai, R. Lange, Mark Neubauer, M. G. Bowler, M. C. Browne, R. L. Helmer, M. Shatkay, C. Howard, C. W. Nally, J. Farine, Alan R. Smith, A. J. Noble, T.H. Burritt, G. Bühler, R. A. Black, J. K. Rowley, Joshua R. Klein, R. A. Ott, W. Locke, B. T. Cleveland, W. Frati, J. R. Wilson, A. B. Knox, Bhaskar Sur, Richard T. Kouzes, M. Bergevin, N. McCauley, C. A. Currat, R. Van Berg, K. Frame, E. B. Norman, K. M. Heeger, A. Wright, R. D. Martin, R. G. H. Robertson, T. D. Steiger, Chris Waltham, M. L. Chen, A. A. Hamian, Ryuta Hazama, M. L. Miller, S. Majerus, and M. A. Howe

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, Particle physics, Neutral current, 010308 nuclear & particles physics, Solar neutrino, media_common.quotation_subject, Cosmic ray, 01 natural sciences, 7. Clean energy, Asymmetry, Nuclear physics, 13. Climate action, 0103 physical sciences, Neutrino, 010306 general physics, Charged current, media_common
Abstract

This article provides the complete description of resultsfrom the Phase I data set of the Sudbury Neutrino Observatory (SNO). ThePhase I data set is based on a 0.65 kt-year exposure of heavy water tothe solar 8B neutrino flux. Included here are details of the SNO physicsand detector model, evaluations of systematic uncertainties, andestimates of backgrounds. Also discussed are SNO's approach tostatistical extraction of the signals from the three neutrino reactions(charged current, neutral current, and elastic scattering) and theresults of a search for a day-night asymmetry in the ?e flux. Under theassumption that the 8B spectrum is undistorted, the measurements fromthis phase yield a solar ?e flux of ?(?e) =1.76+0.05?0.05(stat.)+0.09?0.09 (syst.) x 106 cm?2 s?1, and a non-?ecomponent ?(? mu) = 3.41+0.45?0.45(stat.)+0.48?0.45 (syst.) x 106 cm?2s?1. The sum of these components provides a total flux in excellentagreement with the predictions of Standard Solar Models. The day-nightasymmetry in the ?e flux is found to be Ae = 7.0 +- 4.9 (stat.)+1.3?1.2percent (sys.), when the asymmetry in the total flux is constrained to bezero.

Published
2007

23. Electron energy spectra, fluxes, and day-night asymmetries of8B solar neutrinos from measurements with NaCl dissolved in the heavy-water detector at the Sudbury Neutrino Observatory

Author

B. Aharmim, S. N. Ahmed, A. E. Anthony, E. W. Beier, A. Bellerive, M. Bergevin, S. D. Biller, J. Boger, M. G. Boulay, M. G. Bowler, T. V. Bullard, Y. D. Chan, M. Chen, X. Chen, B. T. Cleveland, G. A. Cox, C. A. Currat, X. Dai, F. Dalnoki-Veress, H. Deng, P. J. Doe, R. S. Dosanjh, G. Doucas, C. A. Duba, F. A. Duncan, M. Dunford, J. A. Dunmore, E. D. Earle, S. R. Elliott, H. C. Evans, G. T. Ewan, J. Farine, H. Fergani, F. Fleurot, J. A. Formaggio, K. Frame, W. Frati, B. G. Fulsom, N. Gagnon, K. Graham, D. R. Grant, R. L. Hahn, J. C. Hall, A. L. Hallin, E. D. Hallman, W. B. Handler, C. K. Hargrove, P. J. Harvey, R. Hazama, K. M. Heeger, L. Heelan, W. J. Heintzelman, J. Heise, R. L. Helmer, R. J. Hemingway, A. Hime, C. Howard, M. A. Howe, M. Huang, P. Jagam, N. A. Jelley, J. R. Klein, L. L. Kormos, M. S. Kos, A. Krüger, C. Kraus, C. B. Krauss, A. V. Krumins, T. Kutter, C. C. M. Kyba, H. Labranche, R. Lange, J. Law, I. T. Lawson, K. T. Lesko, J. R. Leslie, I. Levine, J. C. Loach, S. Luoma, R. MacLellan, S. Majerus, H. B. Mak, J. Maneira, A. D. Marino, N. McCauley, A. B. McDonald, S. McGee, G. McGregor, C. Mifflin, K. K. S. Miknaitis, B. A. Moffat, C. W. Nally, M. S. Neubauer, B. G. Nickel, A. J. Noble, E. B. Norman, N. S. Oblath, C. E. Okada, R. W. Ollerhead, J. L. Orrell, S. M. Oser, C. Ouellet, S. J. M. Peeters, A. W. P. Poon, K. Rielage, B. C. Robertson, R. G. H. Robertson, E. Rollin, S. S. E. Rosendahl, V. L. Rusu, M. H. Schwendener, S. R. Seibert, O. Simard, J. J. Simpson, C. J. Sims, D. Sinclair, P. Skensved, M. W. E. Smith, N. Starinsky, R. G. Stokstad, L. C. Stonehill, R. Tafirout, Y. Takeuchi, G. Tešić, M. Thomson, M. Thorman, T. Tsui, R. Van Berg, R. G. Van de Water, C. J. Virtue, B. L. Wall, D. Waller, C. E. Waltham, H. Wan Chan Tseung, D. L. Wark, J. Wendland, N. West, J. F. Wilkerson, J. R. Wilson, P. Wittich, J. M. Wouters, A. Wright, M. Yeh, and K. Zuber

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Solar neutrino, Isotopes of boron, 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, 13. Climate action, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Neutrino, 010306 general physics, Neutrino oscillation, Lepton
Abstract

Results are reported from the complete salt phase of the Sudbury Neutrino Observatory experiment in which NaCl was dissolved in the {sup 2}H{sub 2}O (''D{sub 2}O'') target. The addition of salt enhanced the signal from neutron capture as compared to the pure D{sub 2}O detector. By making a statistical separation of charged-current events from other types based on event-isotropy criteria, the effective electron recoil energy spectrum has been extracted. In units of 10{sup 6}cm{sup -2}s{sup -1}, the total flux of active-flavor neutrinos from {sup 8}B decay in the Sun is found to be 4.94{sub -0.21}{sup +0.21}(stat){sub -0.34}{sup +0.38}(syst) and the integral flux of electron neutrinos for an undistorted {sup 8}B spectrum is 1.68{sub -0.06}{sup +0.06}(stat){sub -0.09}{sup +0.08}(syst); the signal from ({nu}{sub x},e) elastic scattering is equivalent to an electron-neutrino flux of 2.35{sub -0.22}{sup +0.22}(stat){sub -0.15}{sup +0.15}(syst). These results are consistent with those expected for neutrino oscillations with the so-called large mixing angle parameters and also with an undistorted spectrum. A search for matter-enhancement effects in the Earth through a possible day-night asymmetry in the charged-current integral rate is consistent with no asymmetry. Including results from other experiments, the best-fit values for two-neutrino mixing parameters are {delta}m{sup 2}=(8.0{sub -0.4}{sup +0.6})x10{sup -5}more » eV{sup 2} and {theta}=33.9{sub -2.2}{sup +2.4} degrees.« less

Published
2005

24. Search for periodicities in theB8solar neutrino flux measured by the Sudbury Neutrino Observatory

Author

B. Aharmim, S. N. Ahmed, A. E. Anthony, E. W. Beier, A. Bellerive, M. Bergevin, S. D. Biller, M. G. Boulay, M. G. Bowler, Y. D. Chan, M. Chen, X. Chen, B. T. Cleveland, T. Costin, G. A. Cox, C. A. Currat, X. Dai, H. Deng, J. Detwiler, P. J. Doe, R. S. Dosanjh, G. Doucas, C. A. Duba, F. A. Duncan, M. Dunford, J. A. Dunmore, E. D. Earle, S. R. Elliott, H. C. Evans, G. T. Ewan, J. Farine, H. Fergani, F. Fleurot, J. A. Formaggio, W. Frati, B. G. Fulsom, N. Gagnon, J. TM. Goon, K. Graham, R. L. Hahn, A. L. Hallin, E. D. Hallman, W. B. Handler, C. K. Hargrove, P. J. Harvey, R. Hazama, K. M. Heeger, L. Heelan, W. J. Heintzelman, J. Heise, R. L. Helmer, R. J. Hemingway, A. Hime, M. A. Howe, M. Huang, E. Inrig, P. Jagam, N. A. Jelley, J. R. Klein, L. L. Kormos, M. S. Kos, A. Krüger, C. Kraus, C. B. Krauss, A. V. Krumins, T. Kutter, C. C. M. Kyba, H. Labranche, R. Lange, J. Law, I. T. Lawson, K. T. Lesko, J. R. Leslie, I. Levine, J. C. Loach, S. Luoma, R. MacLellan, S. Majerus, J. Maneira, A. D. Marino, N. McCauley, A. B. McDonald, S. McGee, C. Mifflin, K. K. S. Miknaitis, B. G. Nickel, A. J. Noble, E. B. Norman, N. S. Oblath, C. E. Okada, H. M. O’Keeffe, R. W. Ollerhead, G. D. Orebi Gann, J. L. Orrell, S. M. Oser, T. Ouvarova, S. J. M. Peeters, A. W. P. Poon, C. S. J. Pun, K. Rielage, B. C. Robertson, R. G. H. Robertson, E. Rollin, S. S. E. Rosendahl, M. H. Schwendener, S. R. Seibert, O. Simard, J. J. Simpson, C. J. Sims, D. Sinclair, L. Sinclair, P. Skensved, M. W. E. Smith, R. G. Stokstad, L. C. Stonehill, R. Tafirout, Y. Takeuchi, G. Tešić, M. Thomson, K. V. Tsang, T. Tsui, R. Van Berg, C. J. Virtue, B. L. Wall, D. Waller, C. E. Waltham, H. Wan Chan Tseung, D. L. Wark, J. Wendland, N. West, J. F. Wilkerson, J. R. Wilson, J. M. Wouters, M. Yeh, and K. Zuber

Subjects
Physics, Nuclear and High Energy Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, Flux, Astrophysics, Solar neutrino problem, 01 natural sciences, Radiation flux, Neutrino detector, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Lepton
Abstract

A search has been made for sinusoidal periodic variations in the 8B solar neutrino flux using data collected by the Sudbury Neutrino Observatory over a 4-year time interval. The variation at a period of 1 yr is consistent with modulation of the 8B neutrino flux by the Earth's orbital eccentricity. No significant sinusoidal periodicities are found with periods between 1 d and 10 years with either an unbinned maximum likelihood analysis or a Lomb-Scargle periodogram analysis. The data are inconsistent with the hypothesis that the results of the recent analysis by Sturrock et al., based on elastic scattering events in Super-Kamiokande, can be attributed to a 7% sinusoidal modulation of the total 8B neutrino flux.

Published
2005

25. Measurement of the Total ActiveB8Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity

Author

R. L. Helmer, P. J. Doe, R. L. Hahn, Monica Dunford, A. W. P. Poon, R. MacLellan, S. R. Elliott, R. W. Ollerhead, E. D. Hallman, G. T. Ewan, J. Maneira, I. T. Lawson, W. B. Handler, Y. Takeuchi, J. F. Wilkerson, J. Boger, J. J. Simpson, D. Waller, Reda Tafirout, Darren Grant, Christopher C. M. Kyba, Yuen-Dat Chan, B. L. Wall, C. K. Hargrove, P. Skensved, C. E. Okada, David A. Sinclair, G. A. Cox, Eric B. Norman, F. A. Duncan, R. S. Dosanjh, B. A. Moffat, K. Graham, E. Rollin, J. R. Leslie, M. W.E. Smith, B. T. Cleveland, J. M. Wouters, R. G. Stokstad, Chris Waltham, M. A. Howe, Malcolm M. Fowler, C. Ouellet, S. M. Oser, H. Fergani, Guthrie Miller, J. A. Dunmore, J. Farine, A. J. Noble, X. Chen, X. Dai, G. Tešić, N. West, A. V. Krumins, R. Lange, S. J. M. Peeters, V. L. Rusu, K.K.S. Miknaitis, W. J. Heintzelman, M.G. Boulay, S. J. Brice, A. S. Hamer, K. T. Lesko, G. McGregor, A. L. Hallin, J. R. Wilson, C. Mifflin, T. V. Bullard, R. J. Hemingway, S. McGee, M. Kos, E. D. Earle, S. D. Biller, Bernie G. Nickel, H. Wan Chan Tseung, I. Levine, N. S. Oblath, E. W. Beier, C. A. Duba, H. Labranche, A. B. McDonald, D. L. Wark, M. R. Dragowsky, F. Dalnoki-Veress, M. H. Schwendener, M. G. Bowler, A. D. Marino, B. G. Fulsom, J. C. Hall, J. Law, R. G. H. Robertson, C. J. Sims, Kai Zuber, C. W. Nally, Andrew Hime, B. C. Robertson, G. Doucas, J. B. Wilhelmy, T. Kutter, C. J. Virtue, N. Gagnon, John L. Orrell, L. C. Stonehill, S. N. Ahmed, R. Hazama, T. J. Bowles, Joseph A. Formaggio, N. McCauley, Minfang Yeh, N. A. Jelley, M. Thorman, R. Van Berg, O. Simard, Hal Evans, K. Frame, Alain Bellerive, K. M. Heeger, M. L. Chen, M. A. Thomson, J. Heise, F. Fleurot, A. E. Anthony, S. Luoma, P. Jagam, Joshua R. Klein, R. G. Van de Water, N. Starinsky, H. B. Mak, S. S.E. Rosendahl, P. J. Harvey, and S. Majerus

Subjects
Physics, Particle physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, General Physics and Astronomy, Flux, Cosmic ray, 7. Clean energy, 01 natural sciences, Nuclear physics, Neutrino detector, 13. Climate action, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Astrophysics::Galaxy Astrophysics, Lepton
Abstract

The Sudbury Neutrino Observatory has precisely determined the total active (nu(x)) B-8 solar neutrino flux without assumptions about the energy dependence of the nu(e) survival probability. The measurements were made with dissolved NaCl in heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be 5.21+/-0.27(stat)+/-0.38(syst)x10(6) cm(-2) s(-1), in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields Deltam(2)=7.1(-0.6)(+1.2)x10(-5) eV(2) and theta= 32.5(-2.3)(+2.4) degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.

Published
2004

26. Measurement of the total active 8B solar neutrino flux at the Sudbury Neutrino Observatory with enhanced neutral current sensitivity

Author

S N, Ahmed, A E, Anthony, E W, Beier, A, Bellerive, S D, Biller, J, Boger, M G, Boulay, M G, Bowler, T J, Bowles, S J, Brice, T V, Bullard, Y D, Chan, M, Chen, X, Chen, B T, Cleveland, G A, Cox, X, Dai, F, Dalnoki-Veress, P J, Doe, R S, Dosanjh, G, Doucas, M R, Dragowsky, C A, Duba, F A, Duncan, M, Dunford, J A, Dunmore, E D, Earle, S R, Elliott, H C, Evans, G T, Ewan, J, Farine, H, Fergani, F, Fleurot, J A, Formaggio, M M, Fowler, K, Frame, B G, Fulsom, N, Gagnon, K, Graham, D R, Grant, R L, Hahn, J C, Hall, A L, Hallin, E D, Hallman, A S, Hamer, W B, Handler, C K, Hargrove, P J, Harvey, R, Hazama, K M, Heeger, W J, Heintzelman, J, Heise, R L, Helmer, R J, Hemingway, A, Hime, M A, Howe, P, Jagam, N A, Jelley, J R, Klein, M S, Kos, A V, Krumins, T, Kutter, C C M, Kyba, H, Labranche, R, Lange, J, Law, I T, Lawson, K T, Lesko, J R, Leslie, I, Levine, S, Luoma, R, MacLellan, S, Majerus, H B, Mak, J, Maneira, A D, Marino, N, McCauley, A B, McDonald, S, McGee, G, McGregor, C, Mifflin, K K S, Miknaitis, G G, Miller, B A, Moffat, C W, Nally, B G, Nickel, A J, Noble, E B, Norman, N S, Oblath, C E, Okada, R W, Ollerhead, J L, Orrell, S M, Oser, C, Ouellet, S J M, Peeters, A W P, Poon, B C, Robertson, R G H, Robertson, E, Rollin, S S E, Rosendahl, V L, Rusu, M H, Schwendener, O, Simard, J J, Simpson, C J, Sims, D, Sinclair, P, Skensved, M W E, Smith, N, Starinsky, R G, Stokstad, L C, Stonehill, R, Tafirout, Y, Takeuchi, G, Tesić, M, Thomson, M, Thorman, R, Van Berg, R G, Van de Water, C J, Virtue, B L, Wall, D, Waller, C E, Waltham, H Wan Chan, Tseung, D L, Wark, N, West, J B, Wilhelmy, J F, Wilkerson, J R, Wilson, J M, Wouters, M, Yeh, and K, Zuber

Abstract

The Sudbury Neutrino Observatory has precisely determined the total active (nu(x)) 8B solar neutrino flux without assumptions about the energy dependence of the nu(e) survival probability. The measurements were made with dissolved NaCl in heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be 5.21 +/- 0.27(stat)+/-0.38(syst) x 10(6) cm(-2) s(-1), in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields Deltam(2)=7.1(+1.2)(-0.6) x 10(-5) eV(2) and theta=32.5(+2.4)(-2.3) degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations.

Published
2004

27. Electron spectra measurements and Monte Carlo calculations for a 60Co standardised hot particle source

Author

J. E. Villarreal-Barajas, M. G. Bowler, and M. W. Charles

Subjects
Monte Carlo method, Statistics as Topic, Electrons, Radiation Dosage, Models, Biological, Sensitivity and Specificity, Spectral line, Radiation Protection, Radiation Monitoring, Occupational Exposure, Beta particle, Humans, Scattering, Radiation, Radiology, Nuclear Medicine and imaging, Linear Energy Transfer, Cobalt Radioisotopes, Radiometry, Physics, Radioisotopes, Radiation, Models, Statistical, Radiological and Ultrasound Technology, Electron spectra, Public Health, Environmental and Occupational Health, Reproducibility of Results, General Medicine, Computational physics, Calibration, Body Burden, Hot particle, Atomic physics, Monte Carlo Method, Relative Biological Effectiveness, Power Plants
Abstract

A benchmark set of measured beta particle spectra for a standardised 60 Co hot particle source is presented. The spectra were obtained for conditions similar to those encountered in practical dosimetric applications. The measured spectra were compared with Monte Carlo calculations using the MCNP code. These comparisons provided information to guide the selection of the optimal set-up parameters of the code Important differences were observed in the MCNP calculated spectra when ITS and the default indexing style algorithm were used. Overall the calculations using the default mode of MCNP version 4B provide the best agreement with the measured electron spectra.

Published
2003

28. Direct evidence for neutrino flavor transformation from neutral-current interactions in the Sudbury Neutrino Observatory

Author

D. S. McDonald, E. D. Earle, J. A. Dunmore, R. U. Haq, Christopher C. M. Kyba, M. C.P. Isaac, V. M. Novikov, T. J. Bowles, G. Jonkmans, E. Saettler, H. Fergani, J. R. Wilson, G. Doucas, E. D. Hallman, M. H. Schwendener, E. Bonvin, R. Hazama, Herbert H. Chen, A. B. Knox, N. McCauley, P. J. Doe, J. Law, P. Jagam, N. W. Tanner, C. J. Sims, J. V. Germani, A. Roberge, H. Heron, A. L. Hallin, R. Van Berg, C. Mifflin, J. B. Wilhelmy, P. T. Trent, H. W. Lee, Joseph A. Formaggio, M. R. Dragowsky, M. M. Fowler, S. D. Biller, J. Hewett, T. V. Bullard, Andrew Hime, T. D. Steiger, R. K. Taplin, M. C. Browne, Minfang Yeh, M. L. Chen, R. L. Hahn, Salvador Gil, K. Kazkaz, A. A. Hamian, J. Farine, G. T. Ewan, K. K. Schaffer, N. A. Jelley, N. West, E. W. Beier, Hal Evans, S. S.E. Rosendahl, E. T.H. Clifford, F.M. Newcomer, M. Lay, R. A. Black, F. A. Duncan, J. D. Anglin, P. J. Harvey, Yuen-Dat Chan, S. J. Brice, K. Graham, D. F. Cowen, C. E. Okada, J. D. Hepburn, R. G. H. Robertson, T. C. Andersen, Steven Elliott, J. J. Simpson, Peter Wittich, David A. Sinclair, E.D. Frank, A. S. Hamer, S. M. Oser, R. G. Stokstad, L. C. Stonehill, J. Maneira, R. G. Van de Water, I. Levine, N. Starinsky, P. M. Thornewell, T. J. Radcliffe, K. Frame, S. Majerus, J. H.M. Cowan, T. Spreitzer, D. L. Wark, J. Cameron, W. J. Heintzelman, Chris Waltham, C. J. Virtue, M. O'Neill, M. Moorhead, R. J. Komar, R. C. Allen, K. T. Lesko, M.G. Boulay, Joshua R. Klein, K. McFarlane, N. Gagnon, K. M. Heeger, I. T. Lawson, W. Frati, John L. Orrell, J. M. Wouters, Bhaskar Sur, B. C. Robertson, F. Dalnoki-Veress, H. B. Mak, Richard T. Kouzes, Q. R. Ahmad, A. P. Ferraris, R. J. Boardman, A. D. Marino, Anett Schulke, J. Bigu, M. Bercovitch, J. X. Wang, P. T. Keener, T. Kutter, R. Meijer Drees, G. A. Cox, V. L. Rusu, A. B. McDonald, R. S. Storey, G. McGregor, M. A. Howe, R. W. Ollerhead, A. J. Noble, H. Seifert, J. Manor, Y. I. Tserkovnyak, J. Lyon, Eric B. Norman, J. Heise, C. K. Hargrove, S. Luoma, M. Thorman, N. Tagg, J. F. Wilkerson, Reda Tafirout, Darren Grant, B. A. Moffat, J. G. Hykawy, W. F. Davidson, J. C. Barton, R. L. Helmer, I. Blevis, M. Omori, Monica Dunford, A. W. P. Poon, R. J. Ford, Xin Chen, P. Skensved, G. Milton, X. Dai, H. S. Ng, Mark Neubauer, M. G. Bowler, W. Locke, J. R. Leslie, J. Boger, B. T. Cleveland, W. B. Handler, M. Shatkay, M. W.E. Smith, Alan R. Smith, C. W. Nally, G. Bühler, C. Jillings, J. K. Rowley, C. A. Duba, G. G. Miller, Développement et Communication Chimique chez les Insectes ( DCCI ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, and Delon, Viviane

Subjects
Particle physics, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Tau neutrino, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Solar neutrino problem, Neutrino detector, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Lepton
Abstract

Observations of neutral current neutrino interactions on deuterium in the Sudbury Neutrino Observatory are reported. Using the neutral current, elastic scattering, and charged current reactions and assuming the standard 8B shape, the electron-neutrino component of the 8B solar flux is 1.76 +/-0.05(stat.)+/-0.09(syst.) x10^6/(cm^2 s), for a kinetic energy threshold of 5 MeV. The non-electron neutrino component is 3.41+/-0.45(stat.)+0.48,-0.45(syst.) x10^6/(cm^2 s), 5.3 standard deviations greater than zero, providing strong evidence for solar electron neutrino flavor transformation. The total flux measured with the NC reaction is 5.09 +0.44,-0.43(stat.)+0.46,-0.43(syst.)x10^6/(cm^2 s), consistent with solar models., Comment: 6 pages, 3 figures, correction to author list and minor typographical corrections to references

Published
2002

29. Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in SNO

Author

T. V. Bullard, M. H. Schwendener, B. C. Robertson, E. W. Beier, H. Fergani, G. Doucas, J. M. Wouters, H. W. Lee, J. Law, H. S. Ng, D. L. Wark, P. J. Doe, A. R. Smith, K. McFarlane, J. B. Wilhelmy, T. Kutter, Guthrie Miller, J.D. Anglin, A. S. Hamer, Q. R. Ahmad, C. J. Sims, J. V. Germani, M. Moorhead, R. Meijer Drees, J. Cameron, A. B. McDonald, H. Heron, F. Dalnoki-Veress, Min Chen, A. D. Marino, Christopher C. M. Kyba, John Heise, R. U. Haq, N. McCauley, K. Kazkaz, T. J. Radcliffe, R. G. H. Robertson, M. R. Dragowsky, E. Saettler, R. J. Boardman, T. Spreitzer, G. A. Cox, Andrew Hime, W. B. Handler, J.L. Hewett, Herbert H. Chen, Jochen Klein, Ilan Levine, C. J. Virtue, M. W.E. Smith, I. Lawson, N. Tagg, Anett Schulke, S. J. Brice, J. Bigu, Chris Waltham, A. J. Noble, Y. I. Tserkovnyak, R. L. Hahn, Salvador Gil, G. McGregor, J. G. Hykawy, Yuen-Dat Chan, A. P. Ferraris, J. X. Wang, E. D. Earle, A. L. Hallin, C. Mifflin, B. T. Cleveland, X. Chen, N.W. Tanner, K. Graham, L. C. Stonehill, S. M. Oser, J. Farine, Minfang Yeh, G. Jonkmans, N. West, V. L. Rusu, P. Skensved, M. Lay, R. K. Taplin, F. A. Duncan, J. H.M. Cowan, M. G. Boulay, W. J. Heintzelman, J. C. Barton, N. A. Jelley, M. Thorman, R. A. Black, M. O'Neill, J. J. Simpson, P. T. Keener, R. J. Ford, D. F. Cowen, Monica Dunford, J. Maneira, F. M. Newcomer, A. W. P. Poon, G. Bühler, J. A. Dunmore, A. Knox, P. T. Trent, R. W. Ollerhead, Peter Wittich, J. Lyon, M. C.P. Isaac, R. G. Stokstad, N. Gagnon, K. Frame, J. K. Rowley, B. A. Moffat, K. M. Heeger, I. Blevis, R. S. Storey, John L. Orrell, M. Omori, Joseph A. Formaggio, E. Bonvin, E. D. Hallman, R. Van Berg, W. Locke, A. Roberge, E. T.H. Clifford, J. Boger, T. J. Bowles, C. E. Okada, J. D. Hepburn, S. R. Elliott, David A. Sinclair, G. T. Ewan, T. D. Steiger, K. K. Schaffer, James R. Wilson, T. C. Andersen, A. A. Hamian, E.D. Frank, C. K. Hargrove, D. S. McDonald, X. Dai, V. M. Novikov, R. J. Komar, R. C. Allen, W. Frati, Bhaskar Sur, Mark Neubauer, Richard T. Kouzes, S. S.E. Rosendahl, Hal Evans, M. G. Bowler, M. C. Browne, Ryuta Hazama, R. L. Helmer, M. Bercovitch, S. Majerus, M. Shatkay, C. W. Nally, C. Jillings, C. A. Duba, H. B. Mak, W.F. Davidson, S. D. Biller, J. F. Wilkerson, Reda Tafirout, P. J. Harvey, Darren Grant, P. M. Thornewell, G. Milton, M. A. Howe, J. Manor, Malcolm M. Fowler, Eric B. Norman, H. Seifert, J. R. Leslie, P. Jagam, R. G. Van de Water, N. Starinsky, S. Luoma, and K. T. Lesko

Subjects
Physics, Particle physics, Sudbury Neutrino Observatory, Neutral current, Physics::Instrumentation and Detectors, Solar neutrino, Astrophysics::Cosmology and Extragalactic Astrophysics, Solar neutrino problem, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Nuclear Experiment, Neutrino oscillation, Charged current
Abstract

The Sudbury Neutrino Observatory (SNO) is a 1,000 tonne heavy water Cerenkov‐based neutrino detector situated 2,000 meters underground in INCO’s Creighton Mine near Sudbury, Ontario, Canada. For the neutrinos from 8B decay in the Sun SNO observes the Charged Current neutrino reaction sensitive only to electron neutrinos and others (Neutral Current and Elastic Scattering) sensitive to all active neutrino types and thereby can search for direct evidence of neutrino flavor change. Using these reactions and assuming the standard 8B shape, the ve component of the 8B solar flux is φe = 1.76−0.05+0.05(stat.)−0.09+0.09 (syst.) × 106 cm−2s−1 for a kinetic energy threshold of 5 MeV. The non‐ve component is φμτ = 3.41−0.45+0.45(stat.)−0.45+0.48 (syst.) × 106 cm−2s−1, 5.3σ greater than zero, providing strong evidence for solar ve flavor transformation. The total flux measured with the NC reaction is φNC = 5.09−0.43+0.44(stat.)−0.43+0.46 (syst.) × 106 cm−2s−1, consistent with solar models. For charged current events, ...

Published
2002

30. Measurement of day and night neutrino energy spectra at SNO and constraints on neutrino mixing parameters

Author

J. C. Barton, R. L. Helmer, Monica Dunford, A. W. P. Poon, M. Bercovitch, M. Lay, H. Fergani, J. J. Simpson, P. J. Doe, C. J. Virtue, J. A. Dunmore, R. W. Ollerhead, H. Heron, R. U. Haq, J. Lyon, E. D. Earle, B. A. Moffat, I. Levine, T. J. Radcliffe, G. T. Ewan, W. Locke, J. R. Leslie, B. C. Robertson, A. P. Ferraris, J. X. Wang, V. L. Rusu, K. K. Schaffer, S. D. Biller, A. S. Hamer, B. T. Cleveland, T. Kutter, R. Meijer Drees, N. Tagg, F. A. Duncan, R. J. Ford, P. J. Harvey, N. McCauley, M. C.P. Isaac, M. H. Schwendener, N. Gagnon, Xin Chen, E. Bonvin, R. Hazama, E. D. Hallman, A. J. Noble, R. Van Berg, H. S. Ng, P. M. Thornewell, T. D. Steiger, W. J. Heintzelman, M. L. Chen, A. Roberge, K. McFarlane, P. T. Trent, A. A. Hamian, D. F. Cowen, J. Law, C. J. Sims, Joshua R. Klein, J. V. Germani, D. L. Wark, R. G. Van de Water, N. Starinsky, K. T. Lesko, W. Frati, Q. R. Ahmad, Bhaskar Sur, F. Dalnoki-Veress, T. V. Bullard, P. T. Keener, H. B. Mak, A. D. Marino, I. T. Lawson, Richard T. Kouzes, Anett Schulke, J. Bigu, R. J. Boardman, G. A. Cox, E. W. Beier, M. G. Bowler, J. Heise, C. K. Hargrove, G. McGregor, S. Luoma, J. Boger, Y. I. Tserkovnyak, R. G. Stokstad, N.W. Tanner, D. S. McDonald, A. B. McDonald, M. Shatkay, L. C. Stonehill, J. K. Rowley, M. O'Neill, S. S.E. Rosendahl, G. G. Miller, H. W. Lee, V. M. Novikov, C. W. Nally, Christopher C. M. Kyba, Alan R. Smith, M. Moorhead, G. Jonkmans, E. Saettler, S. Majerus, J. Cameron, H. Seifert, Herbert H. Chen, G. Bühler, J. M. Wouters, E. T.H. Clifford, P. Jagam, C. E. Okada, J. D. Hepburn, M. A. Howe, David A. Sinclair, Yuen-Dat Chan, K. Graham, J. Hewett, S. M. Oser, A. L. Hallin, Andrew Hime, J. Manor, C. Mifflin, J. H.M. Cowan, J. Maneira, I. Blevis, R. L. Hahn, Salvador Gil, G. Doucas, M. Omori, M.G. Boulay, C. Jillings, J. F. Wilkerson, Eric B. Norman, J. R. Wilson, K. Frame, Reda Tafirout, Darren Grant, A. B. Knox, C. A. Duba, K. M. Heeger, Hal Evans, John L. Orrell, W. F. Davidson, J. Farine, R. A. Black, W. B. Handler, Joseph A. Formaggio, Minfang Yeh, N. A. Jelley, N. West, M. Thorman, M. W.E. Smith, M. M. Fowler, M. C. Browne, Steven Elliott, T. C. Andersen, E.D. Frank, R. S. Storey, J. G. Hykawy, R. J. Komar, R. C. Allen, P. Skensved, R. K. Taplin, T. J. Bowles, X. Dai, Mark Neubauer, Chris Waltham, G. Milton, R. G. H. Robertson, T. Spreitzer, F.M. Newcomer, J. D. Anglin, S. J. Brice, Peter Wittich, J. B. Wilhelmy, M. R. Dragowsky, K. Kazkaz, Delon, Viviane, Développement et Communication Chimique chez les Insectes ( DCCI ), and Centre National de la Recherche Scientifique ( CNRS ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Solar neutrino, FOS: Physical sciences, General Physics and Astronomy, Flux, Cosmic ray, Astrophysics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Nuclear astrophysics, Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Astrophysics::Galaxy Astrophysics, Charged current, Physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Astrophysics (astro-ph), High Energy Physics::Phenomenology, 13. Climate action, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino
Abstract

The Sudbury Neutrino Observatory (SNO) has measured day and night solar neutrino energy spectra and rates. For charged current events, assuming an undistorted $^8$B spectrum, the night minus day rate is $14.0% \pm 6.3% ^{+1.5}_{-1.4}%$ of the average rate. If the total flux of active neutrinos is additionally constrained to have no asymmetry, the $\nu_e$ asymmetry is found to be $7.0% \pm 4.9% ^{+1.3}_{-1.2}%$. A global solar neutrino analysis in terms of matter-enhanced oscillations of two active flavors strongly favors the Large Mixing Angle (LMA) solution., Comment: 5 pages, 4 figures; very minor revisions, accepted by Physical Review Letters

Published
2002

31. Measurement of CC interactions produced by ${}^8$B solar neutrinos at SNO

Author

H. W. Lee, H. Mes, D. S. McDonald, John Heise, Ilan Levine, J. A. Dunmore, V. M. Novikov, R. U. Haq, Yuen-Dat Chan, J. F. Wilkerson, M. Moorhead, H. S. Ng, J. Cameron, Y. I. Tserkovnyak, Reda Tafirout, A. L. Hallin, E. T.H. Clifford, J. Boger, C. Mifflin, B. T. Cleveland, E. Bonvin, K. McFarlane, Darren Grant, N. Tagg, Christopher C. M. Kyba, C. E. Okada, J. D. Hepburn, S. M. Oser, David A. Sinclair, Hans C. Evans, T. V. Bullard, E. D. Earle, M. C.P. Isaac, R. W. Ollerhead, X. Chen, G. Milton, A. Roberge, N.W. Tanner, J. Lyon, Guthrie Miller, P. Skensved, H. B. Mak, I. Blevis, J. D. Anglin, E. D. Hallman, T. C. Andersen, E. W. Beier, J. H.M. Cowan, R. G. Stokstad, John L. Orrell, Q. R. Ahmad, F. M. Newcomer, C. J. Virtue, E. Saettler, E.D. Frank, Art Mc Donald, W.F. Davidson, Peter Wittich, P. J. Doe, P. Jagam, S. R. Elliott, M. Omori, Herbert H. Chen, G. T. Ewan, K. K. Schaffer, H. Heron, H. Fergani, J. Karn, Y. Dai, R. J. Ford, Klaus Kirch, D. L. Wark, B. A. Moffat, N. Starinsky, R. Heaton, F. A. Duncan, N. McCauley, C. K. Hargrove, J. C. Barton, B. C. Robertson, M. R. Dragowsky, R. K. Taplin, D. F. Cowen, M. G. Boulay, R. L. Hahn, Salvador Gil, F. Dalnoki-Veress, P. T. Trent, A. Goldschmidt, R. S. Storey, G. Doucas, A. S. Hamer, A. D. Marino, A. Knox, N. West, J. R. Leslie, S. D. Biller, R. J. Komar, R. C. Allen, M. W.E. Smith, M. Bercovitch, M. C. Chon, M. O'Neill, M. A. Howe, J. B. Wilhelmy, T. Kutter, R. Meijer Drees, Min Chen, P. J. Harvey, M. Lay, J. Bigu, S. J. Brice, G. McGregor, P. M. Thornewell, W. J. Heintzelman, R. J. Boardman, Richard George Van de Water, G. A. Cox, I. Lawson, T. J. Radcliffe, K. Frame, A. J. Noble, A. W. P. Poon, Malcolm M. Fowler, P. T. Keener, K. T. Lesko, J. J. Simpson, T. J. Bowles, K. M. Heeger, Eric B. Norman, G. Jonkmans, J. M. Wouters, H. Seifert, S. Luoma, A. Schuelke, Minfang Yeh, A. B. McDonald, N. A. Jelley, M. Thorman, A. P. Ferraris, J. X. Wang, V. L. Rusu, K. Cameron, J. G. Hykawy, J. Hewett, Andrew Hime, M. H. Schwendener, W. McLatchie, M. M. Lowry, J. Law, Jochen Klein, J. V. Germani, J. Farine, M. G. Bowler, M. C. Browne, T.H. Burritt, R. A. Black, G. Bühler, A. R. Smith, R. L. Helmer, W. Locke, J. K. Rowley, M. Shatkay, R. Van Berg, C. W. Nally, T. D. Steiger, A. A. Hamian, C. Jillings, Ryuta Hazama, Chris Waltham, S. Majerus, C. A. Duba, R. G. H. Robertson, W. Frati, Bhaskar Sur, Richard T. Kouzes, James R. Wilson, X. Dai, and Mark Neubauer

Subjects
Nuclear physics, Physics, Angular distribution, Solar neutrino, Neutrino oscillation, Charged current
Published
2001

32. Measurement of the Rate ofνe+d→p+p+e−Interactions Produced byB8Solar Neutrinos at the Sudbury Neutrino Observatory

Author

G. Jonkmans, Y. Dai, J. M. Wouters, A. Goldschmidt, M. G. Bowler, J. Boger, M. Shatkay, John L. Orrell, R. G. Stokstad, C. W. Nally, P. Skensved, M. M. Fowler, J. C. Barton, X. Dai, M. C. Browne, Mark Neubauer, C. Jillings, C. A. Duba, B. C. Robertson, R. L. Helmer, Yuen-Dat Chan, P. Jagam, N. W. Tanner, A. L. Hallin, Chris Waltham, C. Mifflin, Steven Elliott, T. Kutter, J. B. Wilhelmy, H. W. Lee, R. Meijer Drees, R. K. Taplin, M. R. Dragowsky, S. M. Oser, K. Frame, R. U. Haq, N. McCauley, C. K. Hargrove, F.M. Newcomer, R. G. H. Robertson, J. D. Anglin, S. J. Brice, J. H.M. Cowan, C. J. Virtue, M. Moorhead, Peter Wittich, I. Blevis, T. C. Andersen, R. Heaton, S. Luoma, K. M. Heeger, F. A. Duncan, A. Schuelke, R. J. Ford, J. Cameron, M. Omori, R. S. Storey, M. A. Howe, Xin Chen, E.D. Frank, K. McFarlane, Minfang Yeh, N. A. Jelley, N. West, M. W.E. Smith, Q. R. Ahmad, Klaus Kirch, R. Van Berg, M. H. Schwendener, P. T. Trent, J. F. Wilkerson, Reda Tafirout, Mark Guy Boulay, Darren Grant, W. McLatchie, G. Milton, W. F. Davidson, J. Heise, J. G. Hykawy, H. Mes, E. T.H. Clifford, N. Tagg, H. S. Ng, J. Law, J. V. Germani, M. O'Neill, R. G. Van de Water, T. D. Steiger, N. Starinsky, R. J. Bardman, R. J. Komar, R. C. Allen, M. L. Chen, M. C. Chon, H. Seifert, J. Hewett, A. A. Hamian, Andrew Hime, J. Karn, I. T. Lawson, C. E. Okada, J. D. Hepburn, T. J. Bowles, W. Locke, J. R. Leslie, Eric B. Norman, David A. Sinclair, B. T. Cleveland, J. Bigu, G. McGregor, G. A. Cox, R. L. Hahn, Salvador Gil, K. Cameron, Alan R. Smith, J. R. Wilson, M. M. Lowry, H. Fergani, T.H. Burritt, J. A. Dunmore, G. Bühler, S. Majerus, S. D. Biller, Hal Evans, Joshua R. Klein, M. Lay, A. B. Knox, P. J. Harvey, D. S. McDonald, W. Frati, Bhaskar Sur, J. K. Rowley, A. S. Hamer, H. B. Mak, P. M. Thornewell, Richard T. Kouzes, J. J. Simpson, G. Doucas, V. M. Novikov, Y. I. Tserkovnyak, G. G. Miller, W. J. Heintzelman, E. D. Earle, P. T. Keener, K. T. Lesko, M. Thorman, J. Farine, M. C.P. Isaac, G. T. Ewan, K. K. Schaffer, R. A. Black, E. D. Hallman, E. Bonvin, A. B. McDonald, Christopher C. M. Kyba, R. Hazama, P. J. Doe, D. L. Wark, T. V. Bullard, A. Roberge, H. Heron, E. Saettler, E. W. Beier, F. Dalnoki-Veress, A. D. Marino, Herbert H. Chen, M. Bercovitch, D. F. Cowen, A. J. Noble, I. Levine, T. J. Radcliffe, A. W. P. Poon, A. P. Ferraris, J. X. Wang, V. L. Rusu, R. W. Ollerhead, J. Lyon, and B. A. Moffat

Subjects
Nuclear reaction, Physics, Particle physics, Sudbury Neutrino Observatory, 010308 nuclear & particles physics, Solar neutrino, General Physics and Astronomy, Flux, 01 natural sciences, 7. Clean energy, Nuclear physics, Massless particle, 13. Climate action, 0103 physical sciences, Neutrino, 010306 general physics, Charged current, Lepton
Abstract

Solar neutrinos from the decay of 8B have been detected at the Sudbury Neutrino Observatory (SNO) via the charged current (CC) reaction on deuterium and by the elastic scattering (ES) of electrons. The CC reaction is sensitive exclusively to νe, while the ES reaction also has a small sensitivity to νμ and ντ. The flux of νe from 8B decay measured by the CC reaction rate is φCC(ν e )=[1.75±0.07(stat.) −0.11 +0.12 (syst.)×0.05(theor.)]×106cm−2s−1. Assuming no flavor transformation, the flux inferred from the ES reaction rate is φES(ν x )=[2.39±0.34(stat.) −0.14 +0.16 (syst.)]×106cm−2s−1. Comparison of φCC(νe) to the Super-Kamiokande collaboration’s precision value of φES(νx) yields a 3.3σ difference, assuming the systematic uncertainties are normally distributed, providing evidence that there is a nonelectron flavor active neutrino component in the solar flux. The total flux of active 8B neutrinos is thus determined to be (5.44±0.99)×106 cm−2 s−1, in close agreement with the predictions of solar models.

Published
2001

33. Yet more on the circumbinary disk of SS 433

Author

M G Bowler

Subjects
Physics, Solar mass, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Ionization, Astronomy and Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics, Emission spectrum, Circumbinary planet, Ring (chemistry), Recombination
Abstract

The H and He emission lines of the microquasar SS 433 contain features that look very like emission from a circumbinary ring. Phenomenological models have been successful but contain certain ad hoc features. In this note the lines are treated as recombination lines from a highly ionized environment and differences between H and He, previously unexplained, are understood in terms of the different ionization potentials. It now seems inconceivable that these spectral features have origin other than in a circumbinary ring orbiting at approximately 250 km/s - in which case the system mass is approximately 40 solar masses., Comment: 6 pages, 7 figures. Submitted to A & A version 1.2 (25 Aug 13) has an additional section on the radiated intensity in H alpha. This is essentially the published version (see below)

Published
2013

34. Improved fragmentation functions for baryon, antibaryon and popcorn meson production

Author

X. Artru and M. G. Bowler

Subjects
Nuclear physics, Baryon, Physics, Nuclear and High Energy Physics, Particle physics, Meson production, Fragmentation (mass spectrometry), Nuclear Theory, Nuclear Experiment
Abstract

Left-right symmetry dictates the form of baryon, antibaryon and popcorn fragmentation functions. The forms presented here extend and correct earlier work.

Published
1991

36. The production and decay of Tau leptons ine + e ? annihilation at PETRA energies

Author

J. McCardle, A. Caldwell, K. Gather, Stephen Lloyd, T. D. Jones, Y. Eisenberg, R. Beuselinck, P. Dauncey, W. Wallraff, Philip Bull, Malte Hildebrandt, D.W. Schmitz, W. Braunschweig, P. Rosskamp, J. Harvey, Ehud Duchovni, M. Holder, C. M. Hawkes, H. Hultschig, P. J. Dornan, A. J. Campbell, H. U. Martyn, R. Wedemeyer, G. Baranko, B. H. Wiik, John Hart, Sau Lan Wu, V. Mertens, C. Youngman, A. Ladage, R. Fohrmann, A. Eskreys, E. Lohrmann, Michael Dittmar, G. Yekutieli, D. Pandoulas, G. Poelz, M. Althoff, J. Eisenmann, P. Grossmann, B. Neumann, T. Tymieniecka, Gy. Wolf, D. Notz, K. U. Pösnecker, H. M. Fischer, U. Kötz, H. Venkataramania, D. A. Garbutt, W. G. Jones, U. Karshon, R. J. Nowak, P. Leu, D. H. Saxon, R.C.E. Devenish, J. Pyrlik, H. Kowalski, C. Jenkins, Rj Cashmore, F. J. Kirschfink, E. Hilger, G. Kreutz, A. Shapira, Hl Krasemann, E.E. Ronat, M. G. Bowler, G. Knop, H. Kück, H. Siebke, D. Lüke, S. Ritz, D. M. Binnie, P. L. Woodworth, K. Lübelsmeyer, H. Hartmann, D. Strom, M. Rushton, G. Rudolph, Ch. Xiao, A. Jocksch, Stephanie Brandt, Georg Zobernig, T. Kracht, M. Takashima, W. A. T. Wan Abdullah, P. E. L. Clarke, D. K. Hasell, Joseph Izen, G. E. Forden, G. Mikenberg, M. Cherney, J. Thomas, W. Schütte, Fernando Barreiro, K. W. Bell, P. Mättig, D. Trines, M. Mermikides, D. Revel, R. Mir, Hermann Kolanoski, J. K. Sedgbeer, B. Löhr, P. Joos, B. Foster, E. Wicklund, and D. J. Mellor

Subjects
Nuclear physics, Physics, Particle decay, Pair production, Pion, Annihilation, Physics and Astronomy (miscellaneous), Branching fraction, Electron–positron annihilation, Engineering (miscellaneous), Charged particle, Lepton
Abstract

We have observed τ pair production at average CM energies of 13.9, 22.3, 34.5 and 43.1 GeV. The cross-sections are consistent with QED, the cut off parameters beingΛ +>161 GeV andΛ −169 GeV (95% CL). The topological branching fraction of the τ to 1 charged particle,B 1, is 0.847±0.011 (stat) −0.013 +0.016 (syst) and no decays to 5 charged particles were observed resulting inB 5

Published
1985

37. A measurement of σtot(e+e− → hadrons) for cm energies between 12.0 and 36.7 GeV

Author

W. Koch, B. Löhr, P. Mättig, T. D. Jones, P. Joos, G. Poelz, H. Hartmann, P. Schmüser, E. Wicklund, R. Wedemeyer, W. Schütte, J. Proudfoot, RA Stern, J. Franzke, H. Kowalski, T. Barklow, J. Pyrlik, R.C.E. Devenish, D. Notz, H. L. Lynch, O. Römer, R. Carnegie, R. Riethmüller, M. Wollstadt, M. Holder, H. U. Martyn, Y. Eisenberg, H. M. Fischer, D. Revel, H. Hultschig, B. H. Wiik, Rj Cashmore, D. M. Binnie, K. H. Mess, H. Burkhardt, Sau Lan Wu, Norbert Wermes, P. J. Dornan, John Illingworth, Georg Zobernig, Ehud Duchovni, P. L. Woodworth, R. Beuselinck, H. Boerner, W. Braunschweig, W. G. Jones, D. H. Saxon, C. Youngman, Walter Dr. Hillen, L. Köpke, G. Peise, D. R. Quarrie, John Freeman, K. Gather, S Yarker, E.E. Ronat, Gy. Wolf, B. Foster, J. C. Hart, Sl Lloyd, H. G. Sander, M. Ogg, J. Sedgbeer, A. Shapira, W. Wallraff, I. C. Brock, T. R. Wyatt, G. Knop, J. Harvey, J. Rimkus, Hl Krasemann, I. Al-Agil, S. Cooper, G. Rudolph, D. Pandoulas, U. Karshon, P. Grossmann, K. Lübelsmeyer, P. Söding, M. G. Bowler, Giora Mikenberg, Gl Salmon, F. J. Kirschfink, T. Meyer, A. Ladage, D. Heyland, D.W. Schmitz, A. J. Campbell, R. Fohrmann, P. Leu, Juergen Thomas, K. W. Bell, D. Lüke, D. Trines, Hermann Kolanoski, U. Kötz, D. A. Garbutt, E. Hilger, and R. Brandelik

Subjects
Quantum chromodynamics, Physics, Quark, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, High Energy Physics::Experiment, Nuclear Experiment, Mass parameter
Abstract

The ration R = σ (e + e − → hadrons) σ μμ was measured between 12.0 and 36.7 GeV c.m. energy W with a precision of typically ± 5.2%. R is found to be constant with an average R = 4.01 ± 0.03 (stat) ± (syst.) for W ⩾ 14 GeV. Quarks are found to be point-like, the mass parameter describing a possible quark form-factor being larger than 186 GeV. Fits including QCD corrections and a weak neutral-current contribution are presented.

Published
1982

38. Photon pair production bye + e ? annihilation and search for supersymmetric photinos at energies greater than 40 GeV

Author

J. Harvey, C. Youngman, W. Schütte, Fernando Barreiro, H. U. Martyn, H. Venkataramania, J. Pyrlik, E. Hilger, H. Siebke, W. G. Jones, G. Baranko, M. Mermikides, D. Revel, M. Winik, V. Mertens, Ehud Duchovni, H. Kück, D. M. Binnie, A. Jocksch, F. J. Kirschfink, G. Poelz, A. Eskreys, T. D. Jones, R. Rosskamp, M. Cherney, E.E. Ronat, H. M. Fischer, Stephanie Brandt, A. Ladage, W. A. T. Wan Abdullah, P. D. Dauncey, R.C.E. Devenish, J. Thomas, T. Tymieniecka, Michael Dittmar, G. Yekutieli, G. Knop, P. Grossmann, R. Wedemeyer, B. Neumann, A. Caldwell, D. Pandoulas, Stephen Lloyd, U. Kötz, J. McCardle, H. Kowalski, P. E. L. Clarke, Georg Zobernig, R. Mir, D. A. Garbutt, M. G. Bowler, K. Gather, M. Holder, H. Hultschig, D. H. Saxon, B. H. Wiik, R. Beuselinck, R. J. Nowak, John Hart, Sau Lan Wu, U. Karshon, T. Kracht, Giora Mikenberg, D. K. Hasell, E. Lohrmann, K. U. Pösnecker, C. Jenkins, Rj Cashmore, K. Lübelsmeyer, Gy. Wolf, J. Eisenmann, A. Shapira, Joseph Izen, Y. Eisenberg, Ch. Xiao, W. Braunschweig, G. E. Forden, Hl Krasemann, K. W. Bell, P. Mättig, C. M. Hawkes, D. Strom, D. Trines, M. Rushton, G. Rudolph, Hermann Kolanoski, J. K. Sedgbeer, G. Kreutz, D. Lüke, S. Ritz, H. Hartmann, D.W. Schmitz, M. Althoff, P. J. Dornan, D. Notz, R. Fohrmann, M. Takashima, B. Löhr, P. Joos, B. Foster, E. Wicklund, D. J. Mellor, P. Leu, W. Wallraff, and Philip Bull

Subjects
Physics, Nuclear physics, Cross section (physics), Particle physics, Selectron tube, Photon, Missing energy, Annihilation, Pair production, Physics and Astronomy (miscellaneous), High Energy Physics::Experiment, Engineering (miscellaneous), Photino
Abstract

The cross section for the processe + e −→γγ has been measured for c.m. energies 39.5 61 GeV and Λ+> GeV (95% confidence level) have been determined. A search for two photon final states with missing energy provided lower limits on the masses of the photino and selectron.

Published
1984

39. Measurement of the radiative width of theA 2(1320) in two-photon interactions

Author

G. Baranko, H. M. Fischer, P. N. Ratoff, D. H. Saxon, Y. Eisenberg, D. Strom, R. Gerhards, J. Krüger, R. Walczak, Fernando Barreiro, W. Braunschweig, Stephanie Brandt, H. Hartmann, P. J. Dornan, W. G. Jones, D. Trines, G. P. Heath, Hl Krasemann, E.E. Ronat, Guenter Wolf, B. Bock, A. Jocksch, K. Gather, E. Ros, E. Hilger, E. Lohrmann, T. Kracht, Boaz Klima, G. Mikenberg, D. Revel, Wolfram Dietrich Zeuner, J. Eisenmann, H. Kück, W. Wallraff, C. Jenkins, Hermann Kolanoski, J. K. Sedgbeer, R. J. Cashmore, R. Wedemeyer, D. M. Binnie, W. A. T. Wan Abdullah, P. D. Dauncey, T. Tymieniecka, A. Montag, G. Yekutieli, M. Cherney, G. Zonering, H. U. Martyn, K. U. Pösnecker, J. Thomas, E. Bernardi, M. Althoff, D. Notz, D. A. Garbutt, P. Rosskamp, D. K. Hasell, R. Mir, D. Lüke, M. G. Bowler, S. Ritz, A. Shapira, B. Löhr, G. E. Forden, Joseph Izen, P. Joos, B. Foster, P. Mättig, D. Su, F. J. Kirschfink, V. Mertens, M. Holder, H. Kowalski, M. Takashima, H. Hultschig, E. Wicklund, D. J. Mellor, John Hart, Sau Lan Wu, A. Ladage, A. Eskreys, L. Labarga, B. Neumann, R.C.E. Devenish, U. Karshon, A. Caldwell, S. L. Lloyd, G. Poelz, and Philip Bull

Subjects
Physics, Particle acceleration, Cross section (physics), Physics and Astronomy (miscellaneous), Two-photon excitation microscopy, Radiative transfer, Elementary particle, Atomic physics, Engineering (miscellaneous), Resonance (particle physics)
Abstract

The reactione+e−→e+e− A2 (1320) has been observed by detecting the decayA2→π+,π-π0. The two-photon width of theA2 has been measured to be Г(A2→γγ)=(0.09±0.27 (stat)±0.16 (syst)) keV. The cross section σ(γγ→π+,π-π0 has been determined outside theA2 resonance region.

Published
1986

40. Inclusive? 0 production bye + e ? annihilation at 34.6 GeV center of mass energy

Author

H. Kowalski, A. Jocksch, J. Krueger, W. G. Jones, G. Tysarczyk, G. Baranko, R. Mir, B. Löhr, E. Hilger, Greg P Heath, P. Joos, B. Foster, Philip Burrows, J. M. Yelton, D. Notz, P. N. Ratoff, A. Shapira, E. Wicklund, D. J. Mellor, H. U. Martyn, R. Wedemeyer, D. K. Hasell, S. L. Lloyd, M. G. Bowler, D. Strom, G. Poelz, P. J. Dornan, K. Gather, E. Ros, A. Montag, Joseph Izen, M. Cherney, E. Bernardi, A. Ladage, Boaz Klima, G. Mikenberg, R.C.E. Devenish, D. Trines, Paul Dauncey, H. Kück, M. Takashima, K. U. Poesnecker, G. E. Forden, C. Jenkins, A. P. Watson, Fernando Barreiro, Guenter Wolf, H. M. Fischer, A. J. Martin, W. Wallraff, D. H. Saxon, D. Su, N. Wainer, A. Caldwell, Hermann Kolanoski, J. K. Sedgbeer, Wolfram Dietrich Zeuner, E.E. Ronat, Georg Zobernig, H. Hartmann, D. Revel, R. Gerhards, D. Lüke, D. M. Binnie, S. Ritz, J. Shulman, R. J. Cashmore, T. Tymieniecka, Ian R Tomalin, P. Mättig, C. Balkwill, D. A. Garbutt, A. Eskreys, E. Vogel, L. Labarga, B. Bock, T. Kracht, P. Rosskamp, V. Mertens, M. Holder, H. Hultschig, John Hart, Sau Lan Wu, F. J. Kirschfink, B. Neumann, U. Karshon, Stephanie Brandt, G. Yekutieli, Y. Eisenberg, R. Walczak, W. Braunschweig, E. Lohrmann, J. Eisenmann, and Hl Krasemann

Subjects
Nuclear physics, Physics, Range (particle radiation), Cross section (physics), Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Production (computer science), Center of mass, Multiplicity (chemistry), Engineering (miscellaneous), Energy (signal processing)
Abstract

The cross section for the process e+e-→π0+ anything has been measured at an average center of mass energy of 34.6 GeV for π0 energies between 0.7 and 17 GeV. The angular distribution for π0 energies larger than 2 GeV is of the form dσ/dΩ∼1+Acos2θ, with A=1.2±0.5. The ratio of π0 to π± production in the measured energy range is 2σ(π0)/(σ(π+)+σ(π-))=1.13±0.18 The form of the differential cross sections agrees within the errors. The mean π0 multiplicity is 5.8±0.9. © 1986 Springer-Verlag.

Published
1986

41. Extended sources, final state interactions and Bose-Einstein correlations

Author

M. G. Bowler

Subjects
Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Hadron, Elementary particle, Bose–Einstein correlations, Nuclear physics, Pion, Isospin, Nuclear Experiment, Engineering (miscellaneous)
Abstract

The isospin 2 ππ interaction is repulsive, thes-wave phase shift reaching ∼−20° at the mass of the ρ meson. Theπ±π±correlation function shows a strong Bose-Einstein enhancement but no clear sign of this dynamical repulsion. I present the theory of final state interactions appropriate to particle production from an extended source and demonstrate that the data are entirely consistent with the known features of the ππI=2 interaction. The results are relevant to multiple pion production ine+e− annihilation, hadronic reactions and heavy ion collisions.

Published
1988

42. Observation of a narrow enhancement at 1940 MeV

Author

W. Spalding, M. Rozanska, A. Dwurazny, R. J. Cashmore, Fred Wickens, J. Gallivan, M. Cerrada, J. G. Loken, G. J. Blanar, U. Stierlin, R. Klanner, V. Chabaud, C.J.S. Damerell, J.C. Kluyver, H. Tiecke, A. Gonzales-Arroyo, M. Turala, G. Polok, R. Jongerius, H. Dietl, B.D. Hyams, M. G. Bowler, S. Peters, P. Weilhammer, C. Hardwick, B. Alper, G. Thompson, W. Hoogland, J. Turnau, C. Daum, G. Lutz, H. Becker, A. R. Gillman, I. Blakey, K. Rybicki, E. Lorenz, G. Lütjens, L. Hertzberger, M.J. Hotchkiss, W. Männer, and P. Van Deurzen

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Nuclear Theory, Physics::Accelerator Physics, Nuclear Experiment
Abstract

A narrow enhancement is observed in p p states produced inclusively in proton-proton interactions at 93 GeV. The mass 1940 ± 1 MeV is consistent with that of the S(1936).

Published
1980

43. Upper limits on the production rate of the decuplet baryons Δ andΣ* ine + e − annihilation at 34.4 GeV

Author

H. Siebke, M. Winik, C. Youngman, H. M. Fischer, W. G. Jones, R. Riethmüller, H. Venkataramania, J. Pyrlik, H. Kowalski, E. Hilger, M. Takashima, Ehud Duchovni, R.C.E. Devenish, R. J. Cashmore, P. L. Woodworth, T. Tymieniecka, D. Trines, J. McCardle, E.E. Ronat, U. Kötz, H. U. Martyn, B. Löhr, M. G. Bowler, Stephanie Brandt, Philip Bull, D. A. Garbutt, A. Eskreys, R. J. Nowak, W. Wallraff, Hermann Kolanoski, J. K. Sedgbeer, P. Joos, K. Gather, J. Harvey, Georg Zobernig, G. Knop, D. Pandoulas, W. A. T. Wan Abdullah, T. Kracht, G. Mikenberg, H. Hartmann, R. Beuselinck, P. Schmüser, P. E. L. Clarke, C. Jenkins, E. Wicklund, Gy. Wolf, K. W. Bell, P. Mättig, U. Karshon, W. Scütte, A. Caldwell, V. Mertens, Stephen Lloyd, A. Jocksch, K. H. Mess, A. Ladage, G. Baranko, T. D. Jones, G. Poelz, M. Althoff, Ch. Xiao, D. K. Hasell, G. Kreutz, P. Rosskamp, D. Notz, P. J. Dorman, H. Kück, K. U. Pösnecker, B. Foster, D. M. Binnie, P. Grossmann, Joseph Izen, R. Wedemeyer, D. Strom, A. Shapira, K. Lübelsmeyer, M. Rushton, G. Rudolph, B. Neumann, F. J. Kirschfink, M. Holder, H. Hultschig, Michael Dittmar, B. H. Wiik, John Hart, G. Yekutieli, Sau Lan Wu, Y. Eisenberg, W. Braunschweig, C. M. Hawkes, Fernando Barreiro, E. Lohrmann, J. Eisenmann, Hl Krasemann, M. Mermikides, D. Revel, R. Mir, D. H. Saxon, L. Köpke, M. Cherney, P. Leu, J. Thomas, H. G. Sander, G. E. Forden, D. Lüke, S. Ritz, D.W. Schmitz, A. J. Campbell, and R. Fohrmann

Subjects
Physics, Nuclear physics, Baryon, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Octet, Electron–positron annihilation, Invariant mass, Strangeness, Spectral line, Production rate
Abstract

Samples of ∼1,900 identified protons and ∼500 Λ have been used to search for decuplet baryon production ine+e− annihilation at a c.m. energy of 34.4 GeV. Thep π+ and Λ π± invariant mass spectra contain no Δ orΣ* signals. Upper limits, at 95% confidence level, are that less than 12% of allp and less than 26% of all Λ come from the decay of doubly charged Δ and singly chargedΣ* states respectively. These limits correspond to production rates of

Published
1984

44. A measurement of theD s lifetime

Author

A. Montag, M. Takashima, M. Cherney, J. Del Peso, G. Yekutieli, P. D. Dauncey, T. Tymieniecka, D. Muller, F. J. Kirschfink, D. Strom, M. Holder, G. Baranko, H. Hultschig, John Hart, A. J. Sephton, Sau Lan Wu, R. Mir, E.E. Ronat, J. Shulman, C. Balkwill, A. Jocksch, R. Wedemeyer, K. U. Poesnecker, G. Poelz, J. M. Yelton, R. Gerhards, N. Wainer, D. Notz, A. Caldwell, K. Genser, Stephen Lloyd, V. Mertens, Fernando Barreiro, M. G. Bowler, A. Leites, A. Shapira, J. Krüger, J. Pawlak, D. Revel, E. Lohrmann, H. Hartmann, Y. Eisenberg, K. Gather, A. Eskreys, E. Ros, I. R. Tomalin, Wolfram Dietrich Zeuner, L. Labarga, Boaz Klima, W. Braunschweig, P. Mättig, J. Eisenmann, B. Löhr, A. Watson, E. Hilger, P. Joos, B. Foster, D. Trines, E. Wicklund, P. Rosskamp, D. J. Mellor, J. K. Sedgbeer, B. Bock, T. Kracht, A. Kolanoski, H. M. Fischer, A. J. Martin, G. P. Heath, Georg Zobernig, U. Karshon, B. Neumann, R. Walczak, D. K. Hasell, Joseph Izen, Gy. Wolf, D. H. Saxon, G. E. Forden, P. N. Ratoff, Rj Cashmore, Giora Mikenberg, A. Ladage, H. U. Martyn, E. Bernardi, Stephanie Brandt, D. Su, H. Kowalski, D. M. Binnie, Philip Burrows, D. Lüke, and S. Ritz

Subjects
Nuclear physics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Detector, Engineering (miscellaneous), Vertex (geometry)
Abstract

The lifetime of theD s meson has been measured using the TASSO detector at PETRA and found to be (5.7 −2.6 +3.6 ±0.9)×10−13 s. The method used was to reconstruct fully the decay vertex of the channelD s →ϕπ±, ϕ→K + K −.

Published
1987

45. Evidence for the associated production of strange particles and φ mesons

Author

R. J. Cashmore, C.J.S. Damerell, K. Rybicki, E. Lorenz, R. Jongerius, G. Thompson, U. Stierlin, H. Tiecke, M. Turala, J. Turnau, L. Hertzberger, G. Lütjens, S. Peters, R. Klanner, J. Gallivan, M.J. Hotchkiss, V. Chabaud, P. Weilhammer, H. Becker, I. Blakey, J. G. Loken, Antonio González-Arroyo, G. J. Blanar, A. Dwurazny, Fred Wickens, B.D. Hyams, B. Alper, W. Spalding, W. Männer, A. R. Gillman, P. Van Deurzen, H. Dietl, M. G. Bowler, C. Hardwick, G. Polok, M. Rozanska, M. Cerrada, C. Daum, W. Hoogland, and G. Lutz

Subjects
Physics, Nuclear and High Energy Physics, Strange quark, Particle physics, Meson, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Significant part, Nuclear physics, Momentum, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Particle Physics - Experiment
Abstract

Results are presented of an experiment studying inclusive ∅-meson production off protons by hadrons of 93 and 63 GeV incident momentum. Evidence is found for an enhanced probability of observing additional strange particles when the final state contains a ∅ meson. This supports the assumption that central production of ∅ mesons proceeds, for a significant part, by the OZI allowed fusion of strange quarks.

Published
1981

46. Production and decay of charmed mesions ine + e ? annihilation at $$\sqrt s > 28$$

Author

U. Karshon, H. U. Martyn, D. Trines, Eduardo Ros, Jens Hartmann, Guenter Wolf, K. U. Pösnecker, K. Gather, D. Su, Hermann Kolanoski, E. Hilger, G. Mikenberg, K. Genser, M. G. Bowler, J. Shulman, H. M. Fischer, F. J. Kirschfink, D. Strom, H. Kowalski, A. J. Martin, M. Holder, A. Montag, H. Hultschig, B. Löhr, John Hart, Sau Lan Wu, J. Del Peso, Georg Zobernig, E. Bernardi, Janusz Chwastowski, P. Joos, A. Shapira, A. Ladage, J. M. Pawlak, Fernando Barreiro, B. Foster, R. S. Galik, E. Lohrmann, M. E. Veitch, Stephanie Brandt, G. Poelz, E.E. Ronat, T. Kracht, D. H. Saxon, R. Wedemeyer, Ian R Tomalin, P. Mättig, Philip Burrows, D. Revel, Wolfram Dietrich Zeuner, D. Muller, N. Wainer, A. Jocksch, D. Lüke, S. Ritz, G. E. Forden, A. Leites, R. Gerhards, A. Eskreys, A. Caldwell, John Hassard, J. Krüger, H. Hartmann, A. Watson, M. Takashima, D. Notz, G. Yekutieli, Y. Eisenberg, R. Walczak, and W. Braunschweig

Subjects
Physics, Quark, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Charm quark, Nuclear physics, Pair production, High Energy Physics::Experiment, Production (computer science), Charm (quantum number), Engineering (miscellaneous)
Abstract

We report on a study of inclusive production ofD *± mesons ine + e − annihilation at c.m. energies between 28 and 46.8 GeV using the TASSO detector at the PETRA storage ring. A hardD *± energy spectrum is measured with a maximum nearE D *± ≃0.6E beam. The measured cross section ratio $$(\sigma _{D^{* + } } + \sigma _{D^{* - } } )/\sigma _{\mu \mu } = 1.28 \pm 0.09 \pm 0.18$$ indicates thatD * production accounts for a large fraction of the observed charm production. Two complementary methods have been used to determine the forward-backward asymmetry of charm pair production due to electroweak interference. Combining both measurements the product of the axial vector couplings of the electron and the charm quark to the weak neutral current was determined to beg A e g A c =−(0.276±0.073), in agreement with the standard model prediction of −0.25. Using a sample of reconstructedD *± mesons, the relative strength of the strong interaction coupling of thec quark compared to that of an average of all flavours is measured as αs(c)/αs(all)=0.91±0.38±0.15, consistent with the coupling constant being flavour independent. An update of ourD 0 lifetime measurement is presented, based on a considerable increase in statistics, the final result being $$\tau _{D^0 = } (4.8 \pm _{0.9 - 0.7}^{1.0 + 0.5} )10^{ - 13} s$$ .

Published
1989

47. Study of the charge-exchange reactions $$\pi ^ - p \to (\pi ^0 ,\eta ,\eta \prime )n$$ at 63 GeV

Author

Antonio González-Arroyo, S. Peters, P. Weilhammer, R. J. Cashmore, J. Turnau, B. Alper, C. Daum, C.J.S. Damerell, Fred Wickens, W. Spalding, M. Glaubmann, M. Rozanska, H. Dietl, M. G. Bowler, G. Lutz, J. G. Loken, G. J. Blanar, R. Jongerius, U. Stierlin, G. Lütjens, H. Tiecke, K. Rybicki, M. Turala, J. Gallivan, E. Lorenz, A. R. Gillman, R. Klanner, M. Cerrada, V. Chabaud, G. Ascoli, M.J. Hotchkiss, L. Hertzberger, B.D. Hyams, H. Backer, G. Polok, I. Blakey, W. Hoogland, W. Männer, P. Van Deurzen, C. Hardwick, A. Dwurazny, and G. Thompson

Subjects
Nuclear physics, Momentum, Physics, Range (particle radiation), Physics and Astronomy (miscellaneous), Momentum transfer, Pi, Elementary particle, Quantum field theory, Nuclear Experiment, Engineering (miscellaneous), Prime (order theory), Charge exchange
Abstract

Total and differential cross-sections have been measured for the reactions $$\pi ^ - p \to (\pi ^0 ,\eta ,\eta \prime )n$$ . The results agree with those of two experiments carried out in the same energy range, apart from measurements at high |t| for the charge-exchange reaction π− p→π0 n. The latter indicate a deviation from the prediction of a single Regge-pole model with linear trajectories at high incident momentum and high momentum transfer.

Published
1981

48. On the surprisingly large Bose-Einstein enhancement observed in e+e-annihilation

Author

M. G. Bowler

Subjects
Condensed Matter::Quantum Gases, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, State (functional analysis), Resonance (particle physics), String (physics), law.invention, Pion, law, Isospin, Quantum electrodynamics, Bose–Einstein condensate
Abstract

The observed Bose-Einstein enhancement e + e − annihilation is well accounted for by a string model, ignoring resonance production and final state interactions. The data are scarcely compatible with the model when resonance production and like pion final state interactions are taken into account, for both these effects suppress the predicted enhancement. I show that multiparticle final state interactions should not be neglected and that isospin zero final state interactions enhance substantially the correlation, compensating for the repulsive isospin 2 effects.

Published
1989

49. Differential cross sections for in the CM energy range from 2.0 to 3.1 GeV

Author

Georg Zobernig, Gy. Wolf, M. Wollstadt, H. Siebke, R. J. Cashmore, Ehud Duchovni, U. Kötz, T. R. Wyatt, D. A. Garbutt, T. Kracht, Ch. Xiao, E. Lohrmann, Joseph Izen, D. R. Quarrie, H. Kück, D. M. Binnie, D. Pandoulas, M. Dittmar, Tegid Jones, D. Heyland, P. Leu, R. Wedemeyer, R.C.E. Devenish, H. Venkataramania, Gl Salmon, L. Köpke, M. Cherney, T. Barklow, Juergen Thomas, J. Pyrlik, U. Karshon, E. Hilger, D.W. Schmitz, A. Shapira, G. Yekutieli, Hl Krasemann, A. Jocksch, D. Strom, H. Kowalski, H. G. Sander, P. J. Dornan, A. J. Campbell, W. Schütte, Fernando Barreiro, W. Koch, Norbert Wermes, G. Poelz, W. G. Jones, A. Ladage, I. Al-Agil, R. Fohrmann, A. Caldwell, Stephen Lloyd, K. H. Mess, M. Rushton, M. Mermikides, D. Revel, H. U. Martyn, R. Mir, G. Rudolph, B. Neumann, P. Rosskamp, P. L. Woodworth, M. G. Bowler, D. Lüke, K. W. Bell, P. Mättig, J. Rimkus, C. Youngman, D. Trines, Walter Dr. Hillen, G. Peise, I. C. Brock, P. E. L. Clarke, W. Wallraff, Hermann Kolanoski, J. K. Sedgbeer, K. Lübelsmeyer, S. J. Cooper, Y. Eisenberg, W. Braunschweig, H. Hartmann, J. Proudfoot, M. Althoff, D. Notz, D. H. Saxon, J. McCardle, K. Gather, G. Mikenberg, R. Beuselinck, F. J. Kirschfink, E.E. Ronat, P. Grossmann, G. Knop, B. Löhr, P. Joos, M. Holder, B. Foster, H. Hultschig, B. H. Wiik, John Hart, E. Wicklund, Sau Lan Wu, J. Harvey, and H. M. Fischer

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Angular range, Range (particle radiation), Cross section (physics), Angular distribution, Scattering, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Storage ring
Abstract

Exclusive production of proton-antiproton pairs by two photon scattering at CM energies between 2.0 GeV and 3.1 GeV has been measured with the TASSO detector at the e + e − storage ring PETRA. The angular distribution is flat within the accepted CM angular range | cos Θ ∗ |⩽0.7 . The integrated cross section (| cos Θ ∗ |⩽0.6) drops from about 4 nb at 2 GeV to less than 0.5 nb above 3 GeV. For the two-photon production of the η c (2984) and its subsequent decay into proton-antiproton the upper limit Γ(η c →γγ)· B (η c → p p ) keV (95% CL) is found.

Published
1983

50. A2 meson production at high energies in the reaction π−p→π−π−π+p

Author

L. Hertzberger, C.J.S. Damerell, W. Männer, P. Van Deurzen, M. Glaubmann, I. Blakey, M. Cerrada, M. Rozanska, J. G. Loken, W. Spalding, G. J. Blanar, R. J. Cashmore, G. Thompson, B. Alper, G. Polok, C. Daum, S. Peters, P. Weilhammer, G. Lütjens, A. R. Gillman, E. Lorenz, V. Chabaud, J. Turnau, U. Stierlin, H. Becker, Fred Wickens, R. Klanner, W. Hoogland, A. Dwurazny, H. Tiecke, M. Turala, H. Dietl, M.J. Hotchkiss, M. G. Bowler, C. Hardwick, J. Gallivan, B.D. Hyams, and G. Lutz

Subjects
Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Meson production, Meson, Partial wave analysis, Atomic physics, Resonance (chemistry)
Abstract

The A 2 meson is studied in the decay mode ϱ 0 π − using partial wave analyses of 600 000 events from the reaction π − p→ π − π − π + p at 63 and 94 GeV incident momentum. Common production mechanisms are indicated for this resonance and diffractive 1 + and 2 − components.

Published
1980

Catalog

Books, media, physical & digital resources
See catalog results