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

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題名:	Heavy quark mass effects in deep inelastic scattering and global QCD analysis
作者:	W.K. Tung H.L. Lai A. Belyaev J. Pumplin D. Stump C.-P. Yuan 賴宏亮
貢獻者:	臺北市立教育大學自然科學系
關鍵詞:	Deep Inelastic Scattering
日期:	2007
上傳時間:	2009-07-28 16:40:32 (UTC+8)
摘要:	A new implementation of the general PQCD formalism of Collins, including heavy quark mass effects, is described. Important features that contribute to the accuracy and efficiency of the calculation of both neutral current (NC) and charged current (CC) processess are explicitly discussed. This new implementation is applied to the global analysis of the full HERA I data sets on NC and CC cross sections, with correlated systematic errors, in conjunction with the usual fixed-target and hadron collider data sets. By using a variety of parametrizations to explore the parton parameter space, robust new parton distribution function (PDF) sets (CTEQ6.5) are obtained. The new quark distributions are consistently higher in the region x ~ 10−3 than previous ones, with important implications on hadron collider phenomenology, especially at the LHC. The uncertainties of the parton distributions are reassessed and are compared to the previous ones. A new set of CTEQ6.5 eigenvector PDFs that encapsulates these uncertainties is also presented.
關聯:	JHEP 0702:053
顯示於類別:	[Department of Applied Physics and Chemistry] Periodical Articles

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