Heavy-flavor effects in soft gluon resummation for electroweak boson production at hadron colliders

Sep, 2005
26 pages
Published in:
  • Phys.Rev.D 73 (2006) 013002
e-Print:
Report number:
  • ANL-HEP-PR-05-73

Citations per year

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Abstract:
We evaluate the impact of heavy-quark masses on transverse momentum distributions of W, Z, and supersymmetric neutral Higgs bosons at the Tevatron and LHC. The masses of charm and bottom quarks act as non-negligible momentum scales at small transverse momentum, and affect resummation of soft and collinear radiation. We point out inconsistencies in the treatment of heavy-flavor channels at small transverse momentum in massless factorization schemes, and formulate small transverse momentum resummation in a general-mass variable flavor number factorization scheme. The improved treatment of the quark mass dependence leads to non-negligible effects in precision measurements of the W boson mass at the LHC, and may cause observable modifications in production of Higgs bosons and other particles in heavy-quark scattering.
  • 12.15.Ji
  • 13.85.Qk
  • 12.38.Cy
  • p p: inclusive reaction
  • anti-p p: inclusive reaction
  • W: hadroproduction
  • Z0: hadroproduction
  • supersymmetry
  • Higgs particle: hadroproduction
  • gluon: emission