Cross section for bb¯ production via dielectrons in d + Au collisions at √sNN = 200 GeV
PHENIX Collaboration. (2015). Cross section for bb¯ production via dielectrons in d + Au collisions at √sNN = 200 GeV. Physical Review C, 91 (1), 014907. doi:10.1103/PhysRevC.91.014907
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Physical Review CDate
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© 2015 American Physical Society. Published in this repository with the kind permission of the publisher.
We report a measurement of e+e− pairs from semileptonic heavy-flavor decays in d + Au collisions at
√sNN = 200 GeV. By exploring the mass and transverse-momentum dependence of the yield, the bottom decay
contribution can be isolated from charm, and quantified by comparison to PYTHIA and MC@NLO simulations.
The resulting bb¯-production cross section is σdAu
bb¯ = 1.37 ± 0.28 (stat) ± 0.46 (syst) mb, which is equivalent to
a nucleon-nucleon cross section of σ NN
bb = 3.4 ± 0.8 (stat) ± 1.1 (syst) μb.