Prof Roman Walczak: Publications

A search for particles with magnetic charge produced in e⁺e^- annihilations at 543-1543-1543-1GeV

Zeitschrift für Physik C Particles and Fields 38:4 (1988) 543-550

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, 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, JM 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, J Hassard, 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, 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, S Strom, M Takashima, E Wicklund, SL Wu, G Zobernig

Abstract:

By seeking to identify magnetically charged particles by their trajectories in a magnetic field, we set limits on the production of monopoles and dyons, via the process e+e-→γ*→M {Mathematical expression}, of masses up to 17 GeV and of magnetic charges between 10 e and 70 e © 1988 Springer-Verlag.

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.

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→��⁰��⁰ and γγ→4π (phase space), occuring with about equal probability. The Q²-dependence of the cross section is in agreement with the �� form factor. © 1988 Springer-Verlag.

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

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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