Zobrazeno 1 - 10
of 256
pro vyhledávání: '"Bhagwat M"'
Publikováno v:
Few Body Syst.42:91-113,2008
A calculation of the current-quark-mass-dependence of nucleon static electromagnetic properties is necessary in order to use observational data as a means to place constraints on the variation of Nature's fundamental parameters. A Poincare' covariant
Externí odkaz:
http://arxiv.org/abs/0804.3118
Publikováno v:
Eur.Phys.J.ST 140:53-116,2007
Detailed investigations of the structure of hadrons are essential for understanding how matter is constructed from the quarks and gluons of Quantum chromodynamics (QCD), and amongst the questions posed to modern hadron physics, three stand out. What
Externí odkaz:
http://arxiv.org/abs/0802.0217
We summarise applications of Dyson-Schwinger equations to the theory and phenomenology of hadrons. Some exact results for pseudoscalar mesons are highlighted with details relating to the U_A(1) problem. We describe inferences from the gap equation re
Externí odkaz:
http://arxiv.org/abs/0710.2059
Publikováno v:
Few Body Syst.40:209-235,2007
We examine the applicability and viability of methods to obtain knowledge about bound-states from information provided solely in Euclidean space. Rudimentary methods can be adequate if one only requires information about the ground and first excited
Externí odkaz:
http://arxiv.org/abs/nucl-th/0701009
Autor:
Bhagwat, M. S., Maris, P.
Publikováno v:
Phys.Rev.C77:025203,2008
The electromagnetic form factors of vector mesons are calculated in an explicitly Poincar\'e covariant formulation, based on the Dyson--Schwinger equations of QCD, that respects electromagnetic current conservation, and unambiguously incorporates eff
Externí odkaz:
http://arxiv.org/abs/nucl-th/0612069
Autor:
Bhagwat, M. S., Roberts, C. D.
A strongly momentum-dependent dressed-quark mass function is basic to QCD. It is central to the appearance of a constituent-quark mass-scale and an existential prerequisite for Goldstone modes. Dyson-Schwinger equation (DSE) studies have long emphasi
Externí odkaz:
http://arxiv.org/abs/nucl-th/0612032
Publikováno v:
Eur.Phys.J.A31:630-637,2007
In this summary of the application of Dyson-Schwinger equations to the theory and phenomenology of hadrons, some deductions following from a nonperturbative, symmetry-preserving truncation are highlighted, notable amongst which are results for pseudo
Externí odkaz:
http://arxiv.org/abs/nucl-th/0612027
Publikováno v:
Nucl.Phys.A790:10-16,2007
This Dyson-Schwinger equation (DSE) aperc,u highlights recent applications to mesons. It reports features of, and results for, pseudoscalar and scalar bound-state residues in vacuum polarisations, and exhibits how a restoration of chiral symmetry in
Externí odkaz:
http://arxiv.org/abs/nucl-th/0610080
Autor:
Bhagwat, M. S., Tandy, P. C.
Recent lattice-QCD results for the dressed-gluon propagator are used within the quark Dyson-Schwinger equation to determine the gluon-quark vertex dressing necessary to reproduce the lattice-QCD results for the dressed-quark propagator. Both quenched
Externí odkaz:
http://arxiv.org/abs/nucl-th/0601020
Autor:
Bhagwat, M. S., Tandy, P. C.
Publikováno v:
Phys.Rev. D70 (2004) 094039
A model for the dressed quark-gluon vertex, at zero gluon momentum, is formed from a nonperturbative extension of the two Feynman diagrams that contribute at 1-loop in perturbation theory. The required input is an existing ladder-rainbow model Bethe-
Externí odkaz:
http://arxiv.org/abs/hep-ph/0407163