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A study of Bhabha scattering at PETRA energies

Zeitschrift Fur Physik C Particles and Fields 37:2 (1988) 171-177

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, P Rosskamp, B Bock, HM Fischer, H Hartmann, J Hartmann, E Hilger, A Jocksch, V Mertens, R Wedemeyer, B Foster, AJ Martin, AJ Sephton, F Barreiro, E Bernardi, J Chwastowski, Y Eisenberg, A Eskreys, K Gather, K Genser, H Hultschig, P Joos, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, A Montag, D Notz, J Pawlak, E Ronat, E Ros, D Trines, T Tymieniecka, R Walczak, G Wolf, W Zeuner, H Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, KU Pösnecker, DM Binnie, JK Sedgbeer, J Shulman, D Su, AT Watson, JP Cerezo, MA Garcia, A Leites, J del Peso, JF de Troconiz, C Balkwill, MG Bowler, PN Burrows, RJ Cashmore, P Dauncey, GP Heath, DJ Mellor, P Ratoff, I Tomalin, JM Yelton, SL Lloyd, GE Forden, JC Hart, DH Saxon, S Brandt, M Holder, L Labarga, U Karshon, G Mikenberg, D Revel, A Shapira, N Wainer, G Yekutieli, G Baranko, A Caldwell, JM Izen, D Muller, S Ritz, D Strom, M Takashima, E Wicklund, SL Wu, G Zobernig

Abstract:

We report on high statistics Bhabha scattering data taken with the TASSO experiment at PETRA at center of mass energies from 12 GeV to 46.8 GeV. We present an analysis in terms of electroweak parameters of the standard model, give limits on QED cut-off parameters and look for possible signs of compositeness. © 1988 Springer-Verlag.
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Measurement of the two-photon reaction γγ →π+π-π+π- at large values of Q2

Zeitschrift Fur Physik C Particles and Fields 41:3 (1988) 353-357

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, B Bock, HM Fischer, H Hartmann, J Hartmann, E Hilger, A Jocksch, R Wedemeyer, B Foster, AJ Martin, AJ Sephton, F Barreiro, E Bernardi, J Chwastowski, A Eskreys, K Gather, K Genser, H Hultschig, P Joos, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, D Notz, JM Pawlak, KU Pösnecker, E Ros, D Trines, R Walczak, G Wolf, H Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, W Zeuner, DM Binnie, J Hassard, J Shulman, D Su, A Leites, J del Peso, C Balkwill, MG Bowler, PN Burrows, GP Heath, PN Ratoff, IM Silvester, IR Tomalin, ME Veitch, GE Forden, JC Hart, DH Saxon, S Brandt, M Holder, L Labarga, Y Eisenberg, U Karshon, G Mikenberg, A Montag, D Revel, E Ronat, A Shapira, N Wainer, G Yekutieli, A Caldwell, D Muller, S Ritz, D Strom, M Takashima, E Wicklund, SL Wu, G Zobernig

Abstract:

The process γγ→π+π-π+π- has been investigated in reactions of the type e+e-→e+e-π+π-π+π- in the single tag mode. The range of the four momentum squared of one of the virtual photons was 0.28 GeV2/c2≦Q2≦3.6 GeV2/c2, the average being 〈Q2〉=0.92 GeV2/c2; the other photon was quasi real. The reaction is mainly described by the channels γγ→ρ0ρ0 and γγ→4π (phase space), occuring with about equal probability. The Q2-dependence of the cross section is in agreement with the ρ form factor. © 1988 Springer-Verlag.
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A MEASUREMENT OF MUON PAIR PRODUCTION IN E+ E- ANNIHILATION AT CENTER OF MASS ENERGIES 35.0-LESS-THAN-OR-EQUAL-TO-SQUARE-ROOT-S-LESS-THAN-OR-EQUAL-TO-46.8 GEV

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 40:2 (1988) 163-170

Authors:

W BRAUNSCHWEIG, R GERHARDS, FJ KIRSCHFINK, HU MARTYN, B BOCK, HM FISCHER, H HARTMANN, J HARTMANN, E HILGER, A JOCKSCH, R WEDEMEYER, B FOSTER, AJ MARTIN, AJ SEPHTON, E BERNARDI, J CHWASTOWSKI, A ESKREYS, K GATHER, K GENSER, H HULTSCHIG, P JOOS, H KOWALSKI, A LADAGE, B LOHR, D LUKE, P MATTIG, D NOTZ, JM PAWLAK, KU POSNECKER, E ROS, D TRINES, R WALCZAK, G WOLF, H KOLANOSKI, T KRACHT, J KRUGER, E LOHRMANN, G POELZ, W ZEUNER, J HASSARD, J SHULMAN, D SU, F BARREIRO, L HERVAS, A LEITES, J DELPESO, M TRASEIRA, C BALKWILL, MG BOWLER, PN BURROWS, RJ CASHMORE, CM HAWKES, GP HEATH, PN RATOFF, IM SILVESTER, IR TOMALIN, ME VEITCH, GE FORDEN, JC HART, DH SAXON, S BRANDT, M HOLDER, L LABARGA, E DUCHOVNI, Y EISENBERG, U KARSHON, G MIKENBERG, A MONTAG, D REVEL, E RONAT, AN WAINER, G YEKUTIELI, D MULLER, S RITZ, D STROM, M TAKASHIMA, SL WU, G ZOBERNIG
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MEASUREMENT OF THE 2-PHOTON REACTION GAMMA-GAMMA-]PI+PI-PI+PI- AT LARGE VALUES OF Q2

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 41:3 (1988) 353-357

Authors:

W BRAUNSCHWEIG, R GERHARDS, FJ KIRSCHFINK, HU MARTYN, B BOCK, HM FISCHER, H HARTMANN, J HARTMANN, E HILGER, A JOCKSCH, R WEDEMEYER, B FOSTER, AJ MARTIN, AJ SEPHTON, F BARREIRO, E BERNARDI, J CHWASTOWSKI, A ESKREYS, K GATHER, K GENSER, H HULTSCHIG, P JOOS, H KOWALSKI, A LADAGE, B LOHR, D LUKE, P MATTIG, D NOTZ, JM PAWLAK, KU POSNECKER, E ROS, D TRINES, R WALCZAK, G WOLF, H KOLANOSKI, T KRACHT, J KRUGER, E LOHRMANN, G POELZ, W ZEUNER, DM BINNIE, J HASSARD, J SHULMAN, D SU, A LEITES, J DELPESO, C BALKWILL, MG BOWLER, PN BURROWS, GP HEATH, PN RATOFF, IM SILVESTER, IR TOMALIN, ME VEITCH, GE FORDEN, JC HART, DH SAXON, S BRANDT, M HOLDER, L LABARGA, Y EISENBERG, U KARSHON, G MIKENBERG, A MONTAG, D REVEL, E RONAT, A SHAPIRA, N WAINER, G YEKUTIELI, A CALDWELL, D MULLER, S RITZ, D STROM, M TAKASHIMA, E WICKLUND, SL WU, G ZOBERNIG
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A study of energy-energy correlations between 12 and 46.8 GeV c.m. energies

Zeitschrift für Physik C Particles and Fields 36:3 (1987) 349-361

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, P Rosskamp, B Bock, J Eisenmann, HM Fischer, H Hartmann, E Hilger, A Jocksch, V Mertens, R Wedemeyer, B Foster, AJ Martin, AJ Sephton, F Barreiro, E Bernardi, J Chwastowski, Y Eisenberg, A Eskreys, K Gather, H Hultschig, K Genser, P Joos, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, A Montag, D Notz, J Pawlak, E Ronat, D Trines, T Tymieniecka, R Walczak, G Wolf, W Zeuner, H Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, KU Pösnecker, DM Binnie, JK Sedgbeer, J Shulman, D Su, AT Watson, A Leites, J del Peso, E Ros, C Balkwill, MG Bowler, PN Burrows, RJ Cashmore, P Dauncey, GP Heath, DJ Mellor, P Ratoff, I Tomalin, JM Yelton, SL Lloyd, GE Forden, JC Hart, DH Saxon, S Brandt, M Holder, L Labarga, U Karshon, G Mikenberg, D Revel, A Shapira, N Wainer, G Yekutieli, G Baranko, A Caldwell, M Cherney, JM Izen, D Muller, S Ritz, D Strom, M Takashima, E Wicklund, SL Wu, G Zobernig

Abstract:

We present data on energy-energy correlations (EEC) and their related asymmetry (AEEC) in e+e- annihilation in the centre of mass energy range 12
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