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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Treatment of heavy quarks in QCD

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Author(s):
de Oliveira, E. G. [1, 2] ; Martin, A. D. [2] ; Ryskin, M. G. [2, 3] ; Shuvaev, A. G. [3]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
[2] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE - England
[3] NRC Kurchatov Inst, Petersburg Nucl Phys Inst, St Petersburg 188300 - Russia
Total Affiliations: 3
Document type: Journal article
Source: EUROPEAN PHYSICAL JOURNAL C; v. 73, n. 10 OCT 25 2013.
Web of Science Citations: 9
Abstract

We show that to correctly describe the effects of the heavy-quark mass, m(h), in DGLAP evolution, it is necessary to work in the so-called `physical' scheme. In this way, we automatically obtain a smooth transition through the heavy-quark thresholds. Moreover, we show that to obtain NLO accuracy, it is sufficient to account for the heavy-quark mass, m(h), just in the LO (one-loop) splitting function. The use of the (MS) over bar factorization scheme is not appropriate, since at NLO we deal with a mixture of quarks and gluon (that is, the mass of the heavy parton is not well-defined). The formulas for the explicit m(h) dependence of the splitting functions, and for alpha(s), are presented. (AU)

FAPESP's process: 12/05469-4 - Timely phenomenological studies relevant to the LHC
Grantee:Emmanuel Gräve de Oliveira
Support type: Scholarships abroad - Research Internship - Post-doctor