Measurement of Bottom versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at s = 200 GeV
- University of Colorado, Boulder
- ORNL
- Oak Ridge National Laboratory (ORNL)
- University of Tennessee, Knoxville (UTK)
The momentum distribution of electrons from semileptonic decays of charm and bottom quarks for midrapidity |y|<0.35 in p+p collisions at {radical}s = 200 GeV is measured by the PHENIX experiment at the Relativistic Heavy Ion Collider over the transverse momentum range 2 < p{sub T} < 7 GeV/c. The ratio of the yield of electrons from bottom to that from charm is presented. The ratio is determined using partial D/{bar D} {yields} e{sup {+-}} k{sup {-+}} (K unidentified) reconstruction. It is found that the yield of electrons from bottom becomes significant above 4 GeV/c in p{sub T}. A fixed-order-plus-next-to-leading-log perturbative quantum chromodynamics calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is {sigma} b{bar b} = 3.2{sub -1.1}{sup +1.2}(stat){sub -1.3}{sup +1.4}(syst){micro}b.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 963000
- Journal Information:
- Physical Review Letters, Vol. 103, Issue 8; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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