High pT [p subscript T] nonphotonic electron production in p+p collisions at √s=200  [square root of s=200] GeV

High pT [p subscript T] nonphotonic electron production in p+p collisions at √s=200  [square root of s=200] GeV

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...

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Bibliographic Details
Main Authors: 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
Other Authors: Bates Linear Accelerator Center
Format: Article
Language:en_US
Published: American Physical Society 2011
Online Access:http://hdl.handle.net/1721.1/66226
https://orcid.org/0000-0002-5515-4563
https://orcid.org/0000-0001-5839-707X
https://orcid.org/0000-0002-0031-1963
https://orcid.org/0000-0002-9107-6312
Description
Summary: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.

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