Nuclear dependence of charm production

A Blanco-Covarrubias,J Lach,M Procario,A I Kulyavtsev,A M F Endler,A Kushnirenko,L Stutte,T Lungov,P V Neoustroev,V V Molchanov,A P Nilov,L J Dauwe,M Svoiski,G Alkhazov,A Morelos,I Eschrich,S V Petrenko,S B Nurushev,I Konorov,J Kilmer,E Mccliment,S Y Jun,D V Vavilov,A Ocherashvili,L Emediato,V Steiner,K Vorwalter,P S Cooper,P Gouffon,J Amaro-Reyes,I Larin,B V Razmyslovich,V A Prutskoi,U Dersch,N Estrada,N Bondar ,А П Кожевников ,H Krüger,A.s Ayan ,U Akgun,V P Maleev,G.b Dzyubenko ,M E Mattson ,V Kubarovsky ,M A Moinester,J.l Sánchez-López ,A.v Nemitkin ,L.g Landsberg ,C R Newsom ,V I Ruď ,V Matveev,L Kochenda ,А И Ситников ,A Krivshich ,M K Srivastava ,Y Onel,V.e Vishnyakov ,A N Vasiliev,M Kaya,N Terentyev ,V J Smith,J Engelfried,Guillermo Lopez-Hinojosa ,F García ,V Golovtsov ,V V Stepanov ,A Penzo,E Vázquez‐Jáuregui ,A G Atamantchouk,V.a Victorov ,R M Edelstein ,E.m Leikin ,M Iori,P Mathew,A A Vorobyov,Dan Mao ,I Torres,N.p Kuropatkin ,M.y Balatz ,C Escobar ,G.v Davidenko ,V T Kim,J Simon,M Kubantsev ,A Evdokimov ,И С Филимонов ,J M You ,V.s Verebryusov ,A Flores-Castillo,E Gülmez,S Özkorucuklu ,J Russ,A Dolgolenko ,L Uvarov ,V F Kurshetsov,R Zukanovich Funchal

doi:10.1140/epjc/s10052-009-1174-0

Abstract

Using data taken by SELEX during the 1996–1997 fixed target run at Fermilab, we study the production of charmed hadrons on copper and carbon targets with Σ−, p, π−, and π+ beams. Parametrizing the dependence of the inclusive production cross section on the atomic number A as Aα, we determine α for D+, D0, Ds+, D+(2010), Λc+, and their respective anti-particles, as a function of their transverse momentum pt and scaled longitudinal momentum xF. Within our statistics there is no dependence of α on xF for any charm species for the interval 0.1<xF<1.0. The average value of α for charm production by pion beams is αmeson=0.850±0.028. This is somewhat larger than the corresponding average αbaryon=0.755±0.016 for charm production by baryon beams (Σ−, p).

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