Impact of PDF uncertainties at large x on heavy boson production

A bstract We explore the sensitivity of W and Z boson production in hadronic collisions to uncertainties in parton distribution functions (PDFs) at large x arising from uncertainties in nuclear corrections when using deuterium data in global QCD fits. The W and Z differential cross sections show inc...

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Bibliographic Details
Published in:The journal of high energy physics 2012-06, Vol.2012 (6), Article 19
Main Authors: Brady, L. T., Accardi, A., Melnitchouk, W., Owens, J. F.
Format: Article
Language:English
Subjects:
Bosons
Classical and Quantum Gravitation
Collisions
Deuterium
Distribution functions
Elementary Particles
High energy physics
Leptons
Partons
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Quarks
Relativity Theory
Standard model (particle physics)
String Theory
Uncertainty
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Summary:A bstract We explore the sensitivity of W and Z boson production in hadronic collisions to uncertainties in parton distribution functions (PDFs) at large x arising from uncertainties in nuclear corrections when using deuterium data in global QCD fits. The W and Z differential cross sections show increasing influence of nuclear corrections at high boson rapidities, particularly for the d quark, which is diluted somewhat in the decay lepton rapidity distributions. The effects of PDF uncertainties on heavy W ′ and Z ′ bosons beyond the Standard Model become progressively more important for larger boson masses or rapidities, both in pp collisions at the LHC and in scattering at the Tevatron.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP06(2012)019