PQCD Formulations with Heavy Quark Masses and Global Analysis
arXiv:0809.0714
Abstract
We critically review heavy quark mass effects in DIS and their impact on global analyses. We lay out all elements of a properly defined general mass variable flavor number scheme (GM VFNS) that are shared by all modern formulations of the problem. We then explain the freedom in choosing specific implementations and spell out, in particular, the current formulations of the CTEQ and MSTW groups. We clarify the approximations in the still widely-used zero mass variable flavor scheme (ZM VFNS), mention the inherent flaws in its conventional implementation, and consider the possibility of mending some of these flaws. We discuss practical issues concerning the use of parton distributions in various physical applications, in view of the different schemes. And we comment on the possible presence of intrinsic heavy flavors.
Contribution to the HERA - LHC Workshop Proceedings. 19 pages, 2 figures in the form of .eps files. Slightly modified, responding to comments and suggestions following submission of initial version
References in corpus (12)
- Parton distributions for the LHC
- Implications of CTEQ global analysis for collider observables
- Dynamical NNLO parton distributions
- A Variable-Flavour Number Scheme for NNLO
- Treatment of Heavy Quarks in Deeply Inelastic Scattering
- The Charm Parton Content of the Nucleon
- Heavy-quark correlations in deep-inelastic electroproduction
- Parton Distributions: Summary Report
- Recent Progress in Global PDF Analysis
- Higher order corrections to heavy flavour production in deep inelastic scattering
- Inclusive production of heavy-flavored hadrons at NLO in the GM-VFNS
- Overview of the theory of W/Z + jets and heavy flavor
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