Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Ydrefors, E."'
The Bethe-Salpeter equation for a pseudoscalar bound-system, with i) a ladder kernel with massive gluons, ii) dynamically-dressed quark mass function and iii) an extended quark-gluon vertex, is solved in Minkowski space by using the Nakanishi integra
Externí odkaz:
http://arxiv.org/abs/2305.12536
The unpolarized twist-2 (leading) and twist-3 (subleading), T-even, transverse-momentum dependent quark distributions in the pion are evaluated for the first time by using the actual solution of a dynamical equation in Minkowski space. The adopted th
Externí odkaz:
http://arxiv.org/abs/2301.11599
The parton distribution of the pion is obtained for the first time from the solution of a dynamical equation in Minkowski space. The adopted equation is the homogeneous Bethe-Salpeter one with a ladder kernel, described in terms of i) constituent qua
Externí odkaz:
http://arxiv.org/abs/2203.07106
Publikováno v:
Phys. Rev. D 103, 014002 (2021)
A dynamical model is applied to the study of the pion valence light-front wave function, obtained from the actual solution of the Bethe-Salpeter equation in Minkowski space, resorting to the Nakanishi integral representation. The kernel is simplified
Externí odkaz:
http://arxiv.org/abs/2012.04973
Publikováno v:
Phys.Rev. D101 (2020) 096018
The structure of the three-boson bound state in Minkowski space is studied for a model with contact interaction. The Faddeev-Bethe-Salpeter equation is solved both in Minkowski and Euclidean spaces. The results are in fair agreement for comparable qu
Externí odkaz:
http://arxiv.org/abs/2005.07943
The scalar three-body Bethe-Salpeter equation, with zero-range interaction, is solved in Minkowski space by direct integration of the four-dimensional integral equation. The singularities appearing in the propagators are treated properly by standard
Externí odkaz:
http://arxiv.org/abs/1903.01741
Autor:
Castro, A., Ydrefors, E., de Paula, W., Frederico, T., Nogueira, J. H. de Alvarenga, Maris, P.
The challenge to obtain from the Euclidean Bethe--Salpeter amplitude the amplitude in Minkowski is solved by resorting to un-Wick rotating the Euclidean homogeneous integral equation. The results obtained with this new practical method for the amputa
Externí odkaz:
http://arxiv.org/abs/1901.04266
We study the suppression of non-planar diagrams in a scalar QCD model of a meson system in $3+1$ space-time dimensions due to the inclusion of the color degrees of freedom. As a prototype of the color-singlet meson, we consider a flavor-nonsinglet sy
Externí odkaz:
http://arxiv.org/abs/1710.04398
The Bethe-Salpeter equation for three bosons with zero-range interaction is solved for the first time. For comparison the light-front equation is also solved. The input is the two-body scattering length and the outputs are the three-body binding ener
Externí odkaz:
http://arxiv.org/abs/1703.07981
The problem of a relativistic bound-state system consisting of two scalar bosons interacting through the exchange of another scalar boson, in 2+1 space-time dimensions, has been studied. The Bethe-Salpeter equation (BSE) was solved by adopting the Na
Externí odkaz:
http://arxiv.org/abs/1703.07808