Buscar
Mostrando ítems 1-10 de 632
Scalar coupling evolution in a non-perturbative QCD resummation scheme
(2015-07-01)
We compute the Standard Model scalar coupling (λ) evolution in a particular QCD resummation scheme, where the QCD coupling becomes infrared finite due to the presence of a dynamically generated gluon mass, leading to the ...
QCD effective charge and the structure function F-2 at small-x
(Elsevier B.V., 2011-03-28)
We study infrared contributions to the QCD description of the HERA data on the structure function F-2 within the generalized DAS approximation. We argue that this approximation is a natural one and consistent with the ...
Supporting the search for the CEP location with nonlocal PNJL models constrained by lattice QCD
(Springer, 2016-08)
We investigate the possible location of the critical endpoint in the QCD phase diagram based on nonlocal covariant PNJL models including a vector interaction channel. The form factors of the covariant interaction are ...
Generalized variational procedure: an application to nonperturbative QCD
(World Scientific, 2013-07)
We present a generalized variational procedure oriented to the algebraic solution of many-body Hamiltonians expressed in bosonic and fermionic variables. The method specializes in the nonperturbative regime of the solutions. ...
Chiral transition of fundamental and adjoint quarks
(Elsevier B.V., 2014-01-20)
The chiral symmetry breaking transition of quarks in the fundamental and adjoint representation is studied in a model where the gap equation contains two contributions, one containing a confining propagator and another ...
D*D rho vertex from QCD sum rules
(ELSEVIER SCIENCE BV, 2011)
We calculate the form factors and the coupling constant in the D*D rho vertex in the framework of QCD sum rules. We evaluate the three-point correlation functions of the vertex considering D, rho and D* mesons off-shell. ...
QCD sum rules for the 'Z POT + IND C' (3900) state.
(World Scientific Publishing Company, 2014-01-22)
We use the QCD sum rules to study the recently observed charmonium-like structure
Z+
c (3900) as a tetraquark state. We evaluate the three-point function and extract the
coupling constants of the Z+
c J/ψ π+, Z+
c ηc ...
Uses of QCD sumrules (QCDSR) from different points of view
(1998-12-10)
We support the idea that the baryon, B with mass MB, couples to its current with a coupling λ2 B ∼ 0.71 M6 B from an analysis of magnetic moment sum rules. And we find a sum rule among the experimental magnetic moments ...
QCD sum rules study of the J(PC)=1(- -) charmonium Y mesons
(ELSEVIER SCIENCE BV, 2009)
We use QCD sum rules to test the nature of the recently observed mesons Y(4260), Y(4350) and Y(4660), assumed to be exotic four-quark (c (c) over barq (q) over bar) or (c (c) over bars (s) over bar) states with J(PC)= ...
Chiral symmetry breaking in QCD-like gauge theories with a confining propagator and dynamical gauge boson mass generation
(Academic Press Inc. Elsevier B.V., 2012-04-01)
We study chiral symmetry breaking in QCD-like gauge theories introducing a confining effective propagator, as proposed recently by Cornwall, and considering the effect of dynamical gauge boson mass generation. The effective ...