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Study of η production in two-photon collisions

Zeitschrift Fur Physik C Particles and Fields 41:4 (1989) 533-538

Authors:

W Braunschweig, R Gerhards, FJ Kirschfink, HU Martyn, B Bock, HM Fischer, H Hartmann, J Hartmann, E Hilger, A Jocksch, V Mertens, 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 Löhr, D Lüke, P Märtig, D Notz, JM Pawlak, KU Posnecker, E Ros, D Trines, R Walczak, G Wolf, H Kolanoski, T Kracht, J Krüger, E Lohrmann, G Poelz, W Zeuner, J Hassard, J Shulman, D Su, F Barreiro, A Leites, J del Peso, C Balkwill, MG Bowler, PN Burrows, GP Heath, P Ratoff, I Silvester, I Tomalin, E Veitch, GE Forden, JC Hart, DH Saxon, S Brandt, M Holder, L Labarga, E Duchovni, Y Eisenberg, D Hochman, U Karshon, L Lyons, 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:

Production of the ηc meson in e+e- quasireal two photon collisions has been looked for in three channels. The data were obtained from an integrated luminosity of 189 pb-1. An ηc signal is observed in two decay modes (Ks 0K±π∓,π+π-π+π-) with a combined statistical significance of 3.5 standard deviations. Using the known ηc branching ratios to these channels and to K+K-π+π- the combined partial ηc width to γγ is Γγγ(ηc). The first error is statistical, and the second one includes the systematic and branching ratio errors. Calculated as an upper limit we obtain Γγγ(ηc) (95% C.L., including the systematic error). © 1989 Springer-Verlag.
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A STUDY OF JETS FROM B-QUARKS PRODUCED IN E+ E- ANNIHILATIONS AT SQUARE-ROOT S=35-46 GEV

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 42:1 (1989) 17-31

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, J PAWLAK, KU POSNECKER, E ROS, W SCHUTTE, D TRINES, R WALCZAK, G WOLF, H KOLANOSKI, T KRACHT, J KRUGER, E LOHRMANN, G POELZ, W ZEUNER, AT BELK, DM BINNIE, JF HASSARD, J SHULMAN, D SU, F BARREIRO, A LEITES, J DELPESO, C BALKWILL, MG BOWLER, PN BURROWS, RJ CASHMORE, GP HEATH, P RATOFF, IM SILVESTER, I TOMALIN, ME VEITCH, JM YELTON, SL LLOYD, 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, D MULLER, S RITZ, D STROM, M TAKASHIMA, SL WU, G ZOBERNIG
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DEVELOPMENT OF THE ZEUS CENTRAL TRACKING DETECTOR

NUCL INSTRUM METH A 283:3 (1989) 477-483

Authors:

CB BROOKS, FW BULLOCK, RJ CASHMORE, RC DEVENISH, B FOSTER, TJ FRASER, MD GIBSON, RS GILMORE, D GINGRICH, N HARNEW, JC HART, GP HEATH, J HIDDLESTON, AR HOLMES, AK JAMDAGNI, TW JONES, TJ LLEWELLYN, KR LONG, GJ LUSH, J MALOS, NC MARTIN, I MCARTHUR, NA MCCUBBIN, D MCQUILLAN, DB MILLER, MM MOBAYYEN, C MORGADO, J NASH, G NIXON, AG PARHAM, BT PAYNE, JHC ROBERTS, G SALMON, DH SAXON, AJ SEPHTON, D SHAW, TB SHAW, PD SHIELD, J SHULMAN, I SILVESTER, S SMITH, DE STRACHAN, RJ TAPPER, SM TKACZYK, LW TOUDUP, EW WALLIS, R WASTIE, J WELLS, DJ WHITE, FF WILSON, KL YEO
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PRODUCTION AND DECAY OF CHARMED MESONS IN E+ E- ANNIHILATION AT SQUARE-ROOT-S-GREATER-THAN-28 GEV

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 44:3 (1989) 365-378

Authors:

W BRAUNSCHWEIG, R GERHARDS, FJ KIRSCHFINK, HU MARTYN, HM FISCHER, H HARTMANN, J HARTMANN, E HILGER, A JOCKSCH, R WEDEMEYER, B FOSTER, AJ MARTIN, 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, RS GALIK, J HASSARD, J SHULMAN, D SU, I TOMALIN, A WATSON, F BARREIRO, A LEITES, J DELPESO, MG BOWLER, PN BURROWS, ME VEITCH, GE FORDEN, JC HART, DH SAXON, S BRANDT, M HOLDER, 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, SL WU, G ZOBERNIG
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High transverse momentum prompt photon production by π− and π+ on protons at 280 GeV/c

Zeitschrift für Physik C Particles and Fields Springer Nature 37:4 (1988) 535-544

Authors:

WA 70-Collaboration, M Bonesini, E Bonvin, PSL Boóth, D Bortoletto, LJ Carroll, AJ Cass, D Cavalli, G Costa, M Donnat, PA Dorsaz, DN Edwards, JR Fischer, L Fluri, D Frame, F Gianotti, S Jack, JN Jackson, M Kelly, MN Kienzle-Focacci, R Lucock, JG Lynch, L Mandelli, M Martin, L Mathys, A Maxwell, M Mazzanti, JJ Myerscough, PJ Negus, S Pensotti-Rancoita, L Perini, D Perrin, G Polesello, WH Range, L Rosselet, SW Snow, M Tamborini, AS Thompson, RM Turnbull, J Wells, M Werlen
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