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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.)

QCD fixed points: Banks-Zaksscenario or dynamical gluon mass generation?

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Gomez, J. D. ; Natale, A. A.
Total Authors: 2
Document type: Journal article
Source: International Journal of Modern Physics A; v. 32, n. 2-3 JAN 30 2017.
Web of Science Citations: 0

Fixed points in QCD can appear when the number of quark flavors (N-f) is increased above a certain critical value as proposed by Banks and Zaks (BZ). There is also the possibility that QCD possess an effective charge indicating an infrared frozen coupling constant. In particular, an infrared frozen coupling associated to dynamical gluon mass (DGM) generation does lead to a fixed point even for a small number of quarks. We compare the BZ and DGM mechanisms, their beta functions and fixed points, and within the approximations of this work, which rely basically on extrapolations of the dynamical gluon masses at large N-f, we verify that between N-f=8 and N-f=12 both cases exhibit fixed points at similar coupling constant values (g{*}). We argue that the states of minimum vacuum energy, as a function of the coupling constant up to g{*} and for several Nf values, are related to the dynamical gluon mass generation mechanism (AU)

FAPESP's process: 13/22079-8 - Physics of particles and fields: standard model and its extensions
Grantee:Adriano Antonio Natale
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/24065-4 - Strong interaction phenomenology
Grantee:John David Gomez Aguirre
Support Opportunities: Scholarships in Brazil - Doctorate