Single Electrons from Heavy-Flavor Decays in p+p Collisions at s=200 GeV

Le résumé fourni par la source

The invariant differential cross section for inclusive electron production in $p+p$ collisions at $\sqrt{s}=200\text{ }\text{ }\mathrm{GeV}$ has been measured by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider over the transverse momentum range $0.4\ensuremath{\le}{p}_{T}\ensuremath{\le}5.0\text{ }\text{ }\mathrm{GeV}/c$ in the central rapidity region ($|\ensuremath{\eta}|\ensuremath{\le}0.35$). The contribution to the inclusive electron spectrum from semileptonic decays of hadrons carrying heavy flavor, i.e., charm quarks or, at high ${p}_{T}$, bottom quarks, is determined via three independent methods. The resulting electron spectrum from heavy-flavor decays is compared to recent leading and next-to-leading order perturbative QCD calculations. The total cross section of charm quark-antiquark pair production is determined to be ${\ensuremath{\sigma}}_{c\overline{c}}=0.92\ifmmode\pm\else\textpm\fi{}0.15(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.54(\mathrm{syst})\text{ }\text{ }\mathrm{mb}$.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.