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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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A measurement of the Ds lifetime

Zeitschrift Fur Physik C Particles and Fields 35:3 (1987) 317-321

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, E Bernardi, Y Eisenberg, A Eskreys, K Gather, H Hultschig, K Genser, P Joos, U Karshon, B Klima, H Kowalski, A Ladage, B Löhr, D Lüke, P Mättig, A Montag, D Notz, J Pawlak, D Trines, T Tymieniecka, R Walczak, G Wolf, W Zeuner, A Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, KU Poesnecker, DM Binnie, JK Sedgbeer, J Shulman, D Su, AT Watson, F Barreiro, 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, DK Hasell, DH Saxon, S Brandt, M Holder, L Labarga, B Neumann, G Mikenberg, R Mir, D Revel, E Ronat, 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:

The lifetime of the Ds 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 channel Ds→φ{symbol}π±, φ{symbol}→K+K-. © 1987 Springer-Verlag.
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