Zobrazeno 1 - 10
of 213
pro vyhledávání: '"Ydrefors A"'
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
Autor:
Ydrefors, Emanuel, Frederico, Tobias
The projection onto the Light-Front of a Minkowski space Faddeev-Bethe-Salpeter equation model truncated at the valence level is applied to study the proton structure with constituent quarks. The dynamics of the model has built-in: (i) a bound diquar
Externí odkaz:
http://arxiv.org/abs/2211.10959
We undertake the challenging task to reveal the properties of dressed light-quarks in the space- and time-like regions. For that aim, we solved the Dyson-Schwinger equation (DSE) in Minkowski space for the quark propagator in a QCD inspired model, fo
Externí odkaz:
http://arxiv.org/abs/2204.08091
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
Autor:
Ydrefors, Emanuel, Carbonell, Jaume
Publikováno v:
Eur. Phys. J. A (2021) 57:303
We consider a unitary coupled channel model to describe the low energy proton-antiproton scattering and the lower Coulomb-like protonium states. The existence of deeper quasi-bound states of nuclear nature is found to be a consequence of the experime
Externí odkaz:
http://arxiv.org/abs/2110.08628
Autor:
Ydrefors, Emanuel, Frederico, Tobias
Publikováno v:
Phys. Rev. D 104 (2021) 114012
We apply a dynamical three-constituent quark light-front model to study the proton. The dynamics is based on the notion of a diquark (bound or virtual) as the dominant interaction channel, which paramaterizes a contact interaction between the quarks
Externí odkaz:
http://arxiv.org/abs/2108.02146
Autor:
Ydrefors, Emanuel, de Paula, Wayne, Nogueira, Jorge H Alvarenga, Frederico, Tobias, Salmé, Giovanni
The pion electromagnetic form factor has been calculated for the first time from the solutions of the Bethe-Salpeter equation, obtained directly in Minkowski space by using the Nakanishi integral representation of the Bethe-Salpeter amplitude. The on
Externí odkaz:
http://arxiv.org/abs/2106.10018
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