Study Of Electron Pair Production Below The Z-Mass At The Cern Pbarp Collider

J Alitti,G Ambrosini,R Ansari,D Autiero,P Bareyre,I Bertram,G Blaylock,P Bonamy,K Borer, M Bourliaud, D Buskulic,G Carboni, D Cavalli, V Cavasinni,P Cenci,J C Chollet, C Conta,G Costa,F Costantini,L Cozzi, A Cravero,M Curatolo,Andrea Dellacqua,T Delprete, R S Dewolf,L Dilella,Y Ducros,Gary F Egan, K Einsweiler,B Esposito,L Fayard,A Federspiel,R Ferrari, M Fraternali, D Friodevaux, G Fumagalli, J M Gaillard,F Gianotti,O Gildemeister, C Gossling, V G Goggi, S Grunendahl,Kazuo Hara,Sten Hellman,J Hrivnac, H Hufnagel,E Hugentobler, K Hultqvist,E Iacopini, J Incandela, K Jakobs,P Jenni, E E Kluge,N Kurz,S Lami, P Lariccia,M Lefebvre,L Linssen,M Livan,P Lubrano, C Magneville, L Mandelli,L Mapelli, M Mazzanti,Kenneth J Meier,B Merkel,J Meyer,M Moniez,R Moning, M Morganti,L Muller, D J Munday,M Nessi,F Nessitedaldi,C Onions,T Pal, M A Parker,G Parrour, F Pastore, E Pennacchio, J M Pentney,M Pepe,L Perini, C Petridou,P Petroff,H Plothowbesch, G Polesello,A Poppleton,K Pretzl,M Primavera,M Punturo,J P Repellin, A Rimoldi,Mauricio D Sacchi,P Scampoli,J Schacher,Bruno E Schmidt, V Simak,S L Singh, V Sondermann, R Spiwoks, S Stapnes,C Talamonti, F Tondini,S N Tovey, E Tsesmelis,G Unal,M Valdatanappi,V Vercesi, A R Weidberg, P S Wells, T O White, D R Wood,S A Wotton,H Zaccone,A Zylberstejn

PHYSICS LETTERS B（1992）

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摘要

Results on the cross section for the production of electron pairs in ppBAR collisions at square-root s = 630 GeV are presented. The measured value is sigma = 405 +/- 51 (syst.) +/- 84 (syst.) pb, in the invariant mass interval 10 < m < 70 GeV. The results are compared to recent theoretical calculations which include O(alpha(s)2) QCD contributions. The comparison of these data with those of lower energy experiments show approximate scaling as a function of the variable square-root tau = m/ square-root s.

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cross section

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