Heavy quark mass effects in deep inelastic scattering and global QCD analysis | Zendy

Wu-Ki Tung | Zendy; H. L. Lai | Zendy; A. Belyaev | Zendy; J. Pumplin | Zendy; Daniel R. Stump | Zendy; C.–P. Yuan | Zendy

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Heavy quark mass effects in deep inelastic scattering and global QCD analysis

Author(s) -

Wu-Ki Tung,

H. L. Lai,

A. Belyaev,

J. Pumplin,

Daniel R. Stump,

C.–P. Yuan

Publication year - 2007

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2007/02/053

Subject(s) - parton , hera , physics , particle physics , large hadron collider , quantum chromodynamics , deep inelastic scattering , quark , distribution function , formalism (music) , phenomenology (philosophy) , hadron , nuclear physics , scattering , inelastic scattering , art , musical , philosophy , epistemology , quantum mechanics , optics , visual arts

A new implementation of the general PQCD formalism of Collins, includingheavy quark mass effects, is described. Important features that contribute tothe accuracy and efficiency of the calculation of both neutral current (NC) andcharged current (CC) processess are explicitly discussed. This newimplementation is applied to the global analysis of the full HERA I data setson NC and CC cross sections, with correlated systematic errors, in conjunctionwith the usual fixed-target and hadron collider data sets. By using a varietyof parametrizations to explore the parton parameter space, robust new partondistribution function (PDF) sets (CTEQ6.5) are obtained. The new quarkdistributions are consistently higher in the region x ~ 10^{-3} than previousones, with important implications on hadron collider phenomenology, especiallyat the LHC. The uncertainties of the parton distributions are reassessed andare compared to the previous ones. A new set of CTEQ6.5 eigenvector PDFs thatencapsulates these uncertainties is also presented.Comment: 32 pages, 12 figures; updated, Publication Versio

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