298 articles – 2258 Notices  [english version]
 HAL : in2p3-00188259, version 1
 arXiv : hep-ex/0609032
 Physical Review D 76 (2007) 092002
 Measurement of Single Muons at Forward Rapidity in p+p Collisions at $\sqrt{s}$ = 200 GeV and Implications for Charm Production
 PHENIX Collaboration(s)
 (2007)
 Muon production at forward rapidity (1.5 < |\eta| < 1.8) has been measured by the PHENIX experiment over the transverse momentum range 1 < p_T \le 3 GeV/c in sqrt(s) = 200 GeV p+p collisions at the Relativistic Heavy Ion Collider. After statistically subtracting contributions from light hadron decays an excess remains which is attributed to the semileptonic decays of hadrons carrying heavy flavor, i.e. charm quarks or, at high p_T, bottom quarks. The resulting muon spectrum from heavy flavor decays is compared to PYTHIA and a next-to-leading order perturbative QCD calculation. PYTHIA is used to determine the charm quark spectrum that would produce the observed muon excess. The corresponding differential cross section for charm quark production at forward rapidity is determined to be d\sigma_(c c^bar)/dy|_(y=1.6)=0.243 +/- 0.013 (stat.) +/- 0.105 (data syst.) ^(+0.049)_(-0.087) (PYTHIA syst.) mb.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ex/0609032
 in2p3-00188259, version 1 http://hal.in2p3.fr/in2p3-00188259 oai:hal.in2p3.fr:in2p3-00188259 Contributeur : Dominique Girod <> Soumis le : Vendredi 16 Novembre 2007, 11:07:48 Dernière modification le : Mardi 27 Novembre 2007, 10:18:27