Multiplicities of charged hadrons in 280 GeV/c muon-proton scattering

M Arneodo ,A Manz,G Coignet,P Grafström,H Wahlen,T Schröder,B Pietrzyk,F Combley,W Wallucks,A Schlagböhmer,V Eckardt,M Sholz,M Studt,E Rondio,J Ciborowski,D Lanske,H Brück,I Derado,P Payre,M Schouten,W Flauger,S Dahlgren,R Gamet,J Drees,E Gabathuler,P Ribarics,J Pettingale,B Pawlik,G Kellner,C Hoppe,M Maire,C Broll,F.J Hasert,H Pessard,K Schultze,W Mohr,W Stockhausen,E Hagberg,J Gayler,M Scheer,S Kullander,M Schneegans,G Berghoff,V Korbel,A.M Osborne,M Jaffré,C Pascaud,G Eszes,N Schmitz,J Beaufays,B Pönsgen,H Schiemann,F.W Brasse,J Nassalski,F Janata,E Böhm,X De Bouard,J Kesteman,F Dengler,C Benchouk,M Pötsch,D Blum,A Johnson ,H Calén ,G D’agostini ,J.c Thompson ,Gábor Jancsó ,G N Taylor ,P Hayman ,B Badełek ,J Krüger ,J Gajewski ,W S C Williams ,M A Whalley ,S Brown ,L Urbán ,C Peroni ,Klaus Rith ,E Kabuß ,A Edwards ,A Jachołkowska ,M Edwards ,S Wimpenny ,P Giubellino ,S Wheeler ,H M Braun ,T Dreyer ,J M Foster ,R Windmolders ,P R Norton ,J Tóth ,Thomas Ernst ,C P Bee ,Adam Regn Arvidson ,F Montanet ,J S Chima ,K H Becks ,M Düren ,R W Clifft ,J A Coughlan ,J.m Thénard ,A De La Torre ,P Renton ,M I Ferrero ,H E Stier ,N I Geddes ,K Long ,U Landgraf ,I Bird ,J Hass ,Jean Favier ,D K Callebaut ,J.j Aubert ,J Loken ,J Figiel ,E Nagy ,H E Montgomery ,T Sloan ,F Grard ,P Heusse ,F G Oakham ,G Wolf

doi:10.1016/0550-3213(85)90611-x

Abstract

Properties of the hadron multiplicity distributions in 280 GeV/c μ+p interactions have been investigated. The c.m. energy dependence in the range from 4 to 20 GeV of the total charged multiplicities are presented. No variation faster than logarithmic is seen in the energy range of this experiment. Comparison with νp and νp data at lower energy has been made and shows good agreement between μ+p and νp total charged multiplicities. It has been found that the average forward multiplicity (charged hadrons with xF > 0) exceeds the average backward multiplicity (charged hadrons with xF < 0) in the whole energy range and presents a different energy variation. The average forward multiplicity has been compared to e+e− data and shows a similar dependence on energy. Little correlation was observed between the forward and backward multiplicities indicating that the current and target regions fragment almost independently.

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