High Pt [p Subscript T] Nonphotonic Electron Production in P+p Collisions at S=200[square Root of S=200] Gev Accessed Terms of Use Detailed Terms
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Citation Agakishiev, H. et al. (STAR Collaboration) "High pT nonphotonic electron production in p+p collisions at s=200GeV" Phys. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. High p T nonphotonic electron production in p þ p collisions at ffiffi ffi s p ¼ 200 GeV We present the measurement of nonphotonic electron production at high transverse momentum (p T > 2:5 GeV=c) in p þ p collisions at ffiffi ffi s p ¼ 200 GeV using data recorded during 2005 and 2008 by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The measured cross sections from the two runs are consistent with each other despite a large difference in photonic background levels due to different detector configurations. We compare the measured nonphotonic electron cross sections with previously published RHIC data and perturbative quantum chromodynamics H. AGAKISHIEV et al. calculations. Using the relative contributions of B and D mesons to nonphotonic electrons, we determine the integrated cross sections of electrons (e þ þe À 2) at 3 GeV=c < p T < 10 GeV=c from bottom and charm meson decays to be ½ðd ðB!eÞþðB!D!eÞ Þ=ðdy e Þ y e ¼0 ¼ 4:0 AE 0:5ðstatÞ AE 1:1ðsystÞ nb and ½ðd D!e Þ=ðdy e Þ y e ¼0 ¼ 6:2 AE 0:7ðstatÞ AE 1:5ðsystÞ nb, respectively.
منابع مشابه
Transverse momentum and centrality dependence of High-p(T) nonphotonic electron suppression in Au plus Au collisions at root(NN)-N-S=200 GeV
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We present STAR’s measurements of azimuthal correlations between nonphotonic electrons and charged hadrons in p+p, Cu+Cu and Au+Au collisions at √ sNN = 200 GeV. In p+p collisions, from the non-photonic e-h correlation we have extracted the relative B meson semi-leptonic decay contributions to non-photonic electrons up to electron pt ∼ 9 GeV/c. In central Cu+Cu and Au+Au collisions where a dens...
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تاریخ انتشار 2011