Measurement of the Bottom Quark Contribution to Nonphotonic Electron Production in p+p Collisions at √s=200 GeV

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  • STAR Collaboration

Colleges, School and Institutes


The contribution of B meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in p + p collisions at root s = 200 GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted B decay contribution is approximately 50% at a transverse momentum of p_T >= 5 GeV/c. These measurements constrain the nuclear modification factor for electrons from B and D meson decays. The result indicates that B meson production in heavy ion collisions is also suppressed at high p_T.


Original languageEnglish
Article number202301
Number of pages6
JournalPhysical Review Letters
Issue number20
Publication statusPublished - 12 Nov 2010