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A STUDY OF 3-JET EVENTS AT THE CERN PP COLLIDER

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 30:3 (1986) 341-353

Authors:

JA APPEL, P BAGNAIA, M BANNER, R BATTISTON, K BERNLOHR, K BORER, M BORGHINI, J BURGER, G CARBONI, V CAVASINNI, P CENCI, JC CHOLLET, AG CLARK, A CODINO, C CONTA, P DARRIULAT, B DELOTTO, T DELPRETE, L DILELLA, J DINESHANSEN, K EINSWEILER, R ENGELMANN, L FAYARD, M FRATERNALI, D FROIDEVAUX, JM GAILLARD, O GILDEMEISTER, VG GOGGI, C GOSSLING, B HAHN, H HANNI, JR HANSEN, P HANSEN, N HARNEW, T HIMEL, L ICONOMIDOUFAYARD, K JAKOBS, P JENNI, EE KLUGE, O KOFOEDHANSEN, E LANCON, M LIVAN, S LOUCATOS, B MADSEN, P MANI, B MANSOULIE, GC MANTOVANI, L MAPELLI, K MEIER, B MERKEL, R MOLLERUD, M MONIEZ, R MONING, M MORGANTI, C ONIONS, MA PARKER, G PARROUR, F PASTORE, M PEPE, H PLOTHOWBESCH, M POLVEREL, JP REPELLIN, A RIMOLDI, AF ROTHENBERG, A ROUSSARIE, V RUHLMANN, G SAUVAGE, J SCHACHER, M SCHLOTELBURG, F STOCKER, M SWARTZ, J TEIGER, SN TOVEY, WY TSANG, M VALDATANAPPI, V VERCESI, AR WEIDBERG, M WUNSCH, H ZACCONE
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MEASUREMENT OF W+/- AND Z0 PROPERTIES AT THE CERN PBARP COLLIDER

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 30:1 (1986) 1-22

Authors:

JA APPEL, P BAGNAIA, M BANNER, R BATTISTON, K BERNLOHR, K BORER, M BORGHINI, G CARBONI, V CAVASINNI, P CENCI, JC CHOLLET, AG CLARK, A CODINO, C CONTA, P DARRIULAT, B DELOTTO, T DELPRETE, L DILELLA, J DINESHANSEN, K EINSWEILER, R ENGELMANN, L FAYARD, M FRATERNALI, D FROIDEVAUX, JM GAILLARD, O GILDEMEISTER, VG GOGGI, C GOSSLING, B HAHN, H HANNI, JR HANSEN, P HANSEN, N HARNEW, T HIMEL, L ICONOMIDOUFAYARD, K JAKOBS, P JENNI, EE KLUGE, O KOFOEDHANSEN, E LANCON, M LIVAN, S LOUCATOS, B MADSEN, P MANI, B MANSOULIE, GC MANTOVANI, L MAPELLI, K MEIER, B MERKEL, R MOLLERUD, M MONIEZ, R MONING, M MORGANTI, B NILSSON, C ONIONS, MA PARKER, G PARROUR, F PASTORE, M PEPE, H PLOTHOWBESCH, M POLVEREL, A PUTZER, JP REPELLIN, AF ROTHENBERG, A ROUSSARIE, V RUHLMANN, G SAUVAGE, J SCHACHER, M SCHLOTELBURG, F STOCKER, M SWARTZ, J TEIGER, K TITTEL, SN TOVEY, WY TSANG, M VALDATANAPPI, V VERCESI, AR WEIDBERG, M WUNSCH, H ZACCONE
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Comparison of charged particle multiplicities in quark and gluon jets produced in e+e- annihilation at 29 GeV

Physics Letters B 165:4-6 (1985) 449-453

Authors:

M Derrick, KK Gan, P Kooijman, JS Loos, B Musgrave, LE Price, J Schlereth, K Sugano, JM Weiss, DE Wood, D Blockus, B Brabson, SW Gray, C Jung, H Neal, H Ogren, DR Rust, M Valdata-Nappi, C Akerlof, G Bonvicini, J Chapman, D Errede, N Harnew, P Kesten, DI Meyer, D Nitz, AA Seidl, R Thun, T Trinko, M Willutzky, S Abachi, P Baringer, I Beltrami, BG Bylsma, R Debonte, D Koltick, FJ Loeffler, EH Low, RL McIlwain, DH Miller, CR Ng, LK Rangan, EI Shibata, B Cork

Abstract:

The charged particle multiplicities of the quark and gluon jets in the three-fold symmetric e+e- → qqg events at √s = 29 GeV have been studied using the high resolution spectrometer at PEP. A value of 〈n〉g = 6.7-2.1+1.1±1.0 for gluon jet s with an energy of 9.7-2.0+1.5 GeV is measured. The ratio, 〈n〉g/〈n〉q, is 1.29-0.41+0.21±0.20, which i s significantly lower than the value of 9 4 naively expected from the ration of the gluon-to-quark color charges. © 1985.
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Experimental study of the emergence of two-jet dominance in pp collisions at √s = 630 GeV

Physics Letters B 165:4-6 (1985) 441-448

Authors:

JA Appel, P Bagnaia, M Banner, R Battiston, K Bernlöhr, K Borer, M Borghini, G Carboni, V Cavasinni, P Cenci, JC Chollet, AG Clark, C Conta, P Darriulat, B De Lotto, T Del Prete, L Di Lella, J Dines-Hansen, K Einsweiler, R Engelmann, L Fayard, M Fraternali, D Froidevaux, JM Gaillard, O Gildemeister, VG Goggi, C Gössling, B Hahn, H Hänni, JR Hansen, P Hansen, N Harnew, T Himel, L Iconomidou-Fayard, P Jenni, EE Kluge, O Kofoed-Hansen, E Lançon, M Livan, S Loucatos, B Madsen, P Mani, B Mansoulié, GC Mantovani, L Mapelli, K Meier, B Merkel, R Mollerud, M Moniez, R Moning, M Morganti, C Onions, MA Parker, G Parrour, F Pastore, M Pepe, H Plothow-Besch, M Polverel, JP Repellin, A Rimoldi, AF Rothenberg, A Roussarie, V Ruhlmann, G Sauvage, J Schacher, M Schlötelburg, F Stocker, M Swartz, J Teiger, SN Tovey, WY Tsang, M Valdata-Nappi, V Vercesi, AR Weidberg, M Wunsch, H Zaccone

Abstract:

A heuristic model is used to describe data collected by the UA2 experiment at √s = 630 GeV. Distributions of the energy sharing between the leading clusters and the rest of the event are examined. The main features of these distributions can be described by a two-component model with soft, collective interactions dominating at low transverse energy and hard, constituent interactions dominating at high transverse energy. This model provides a simple picture of the emergence of two-jet dominance at SPS pp Collider energies. © 1985.
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Inclusive charged particle production near the kinematic limit in e+e- annihilation at 29 GeV

Physics Letters B 164:1-3 (1985) 199-202

Authors:

M Derrick, P Kooijman, JS Loos, B Musgrave, LE Price, J Schlereth, K Sugano, JM Weiss, DE Wood, P Baringer, D Blockus, B Brabson, SW Gray, C Jung, H Neal, H Ogren, DR Rust, M Valdata-Nappi, C Akerlof, G Bonvicini, J Chapman, D Errede, N Harnew, P Kesten, DI Meyer, D Nitz, AA Seidl, R Thun, T Trinko, M Willutzky, S Abachi, I Beltrami, BG Bylsma, R Debonte, KK Gan, D Koltick, FJ Loeffler, EH Low, RL McIlwain, DH Miller, CR Ng, LK Rangan, EI Shibata, B Cork

Abstract:

Inclusive production of charged particles has been studied in e+e- annihilation at ss=29 GeV using the high resolution spectrometer at PEP. Differential cross sections are presented in the range of scaled energy 0.1
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