Journal
PHYSICAL REVIEW D
Volume 78, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.78.074014
Keywords
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Funding
- U.S. Department of Energy [DE-FG03-91ER40662, DE-FG02-97IR41022]
- National Science Foundation [NSF-PHY-0456681, NSF-PHY-0547564]
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We calculate the next-to-leading order (NLO) QCD corrections to Zb(b)overbar production in hadronic collisions including full bottom-quark mass effects. We present results for the total cross section and the invariant mass distribution of the bottom-quark jet pair at the Fermilab Tevatron p(p)overbar collider. We perform a detailed comparison with a calculation that considers massless bottom quarks, as implemented in the Monte Carlo program MCFM. We find that neglecting bottom-quark mass effects overestimates the total NLO QCD cross section for Zb(b)overbar production at the Tevatron by about 7%, independent of the choice of the renormalization and factorization scales. Moreover, bottom-quark mass effects can impact the shape of the bottom-quark pair invariant mass distribution, in particular, in the low invariant mass region.
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