High pT [p subscript T] nonphotonic electron production in p+p collisions at √s=200 [square root of s=200] GeV
Author(s)
Balewski, Jan T.; Betancourt, Michael Joseph; Corliss, Ross Cameron; Hays-Wehle, James Prewitt; Leight, William Axel; Seele, Joseph Patrick; Surrow, Bernd; Milner, Richard G; Redwine, Robert P; Steadman, Stephen G; van Nieuwenhuizen, Gerrit J; Walker, Matthew H; ... Show more Show less![Thumbnail](/bitstream/handle/1721.1/66226/Agakishiev-2011-High%20p%28T%29%20nonphotoni.pdf.jpg?sequence=6&isAllowed=y)
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We present the measurement of nonphotonic electron production at high transverse momentum (pT>2.5 GeV/c) [(p subscript T > 2.5 GeV/c)] in p+p collisions at √s=200 [square root of s=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 calculations. Using the relative contributions of B and D mesons to nonphotonic electrons, we determine the integrated cross sections of electrons (e++e-/2) [e superscript + plus e superscript - /2)] at 3 GeV/c<pT<10 GeV/c [3 GeV/c < p subscript T <10 GeV/c] from bottom and charm meson decays to be [(dσ(B→e)+(B→D→e))/(dye)]ye=0=4.0±0.5(stat)±1.1(syst) [[(d delta subscript (B→e) + (B→D→e) / (dY subscript e)] subscript ye=0 = 4.0±0.5(stat)±1.1(syst)] nb and [(dσD→e)/(dye)]ye=0=6.2±0.7(stat)±1.5(syst) [[(d delta subscript D→e) / (dY subscript e)] subscript ye=0 = 6.2±0.7(stat)±1.5(syst)] nb, respectively.
Date issued
2011-03Department
Bates Linear Accelerator Center; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical review D
Publisher
American Physical Society
Citation
Agakishiev, H. et al. (STAR Collaboration) "High pT nonphotonic electron production in p+p collisions at √s=200 GeV" Phys. Rev. D 83, 052006 (2011) © 2011 American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368