Analyzing dynamical gluon mass generation
نویسندگان
چکیده
منابع مشابه
Analyzing dynamical gluon mass generation
We study the necessary conditions for obtaining infrared finite solutions from the Schwinger-Dyson equation governing the dynamics of the gluon propagator. The equation in question is set up in the Feynman gauge of the background field method, thus capturing a number of desirable features. Most notably, and in contradistinction to the standard formulation, the gluon self-energy is transverse or...
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We discuss the solutions obtained for the gluon propagador in Landau gauge within two distinct approximations for the Schwinger-Dyson equations (SDE). The first, named Mandelstam’s approximation, consist in neglecting all contributions that come from fermions and ghosts fields while in the second, the ghosts fields are taken into account leading to a coupled system of integral equations. In bot...
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Using the expression of the dynamical gluon mass obtained through the operator product expansion we discuss the relevance of gluon mass effects in the decays V → hadrons (V = J/ψ, Υ). Relativistic and radiative corrections are also introduced to calculate αs(mc) and αs(mb) comparing them with other values available in the literature. The effects of dynamical gluon masses are negligible for Υ de...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 2007
ISSN: 0103-9733
DOI: 10.1590/s0103-97332007000200013