212 articles – 1959 Notices  [english version]
 HAL : in2p3-00130396, version 1
 arXiv : hep-ex/0609010
 Physical Review Letters 97 (2006) 252002
 Measurement of high-$p_T$ Single Electrons from Heavy-Flavor Decays in p+p Collisions at $\sqrt{s}$ = 200 GeV
 PHENIX Collaboration(s)
 (2006)
 The momentum distribution of electrons from decays of heavy flavor (charm and beauty) for midrapidity |y| < 0.35 in p+p collisions at sqrt(s) = 200 GeV has been measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) over the transverse momentum range 0.3 < p_T < 9 GeV/c. Two independent methods have been used to determine the heavy flavor yields, and the results are in good agreement with each other. A fixed-order-plus-next-to-leading-log pQCD calculation agrees with the data within the theoretical and experimental uncertainties, with the data/theory ratio of 1.72 +/- 0.02^stat +/- 0.19^sys for 0.3 < p_T < 9 GeV/c. The total charm production cross section at this energy has also been deduced to be sigma_(c c^bar) = 567 +/- 57^stat +/- 224^sys micro barns.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
 Lien vers le texte intégral : http://fr.arXiv.org/abs/hep-ex/0609010
 in2p3-00130396, version 1 http://hal.in2p3.fr/in2p3-00130396 oai:hal.in2p3.fr:in2p3-00130396 Contributeur : Dominique Girod <> Soumis le : Lundi 12 Février 2007, 10:14:05 Dernière modification le : Mardi 4 Décembre 2007, 11:05:19