Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Villavicencio, Cristian"'
Publikováno v:
Phys. Rev. D 109 (2024) 116018
We compute the one-loop QCD correction to the photon-quark-antiquark vertex in an extremely strong magnetic background, i.e., one in which $\sqrt{eB}$ is much larger than all other mass scales. We resort to the lowest-Landau level approximation, and
Externí odkaz:
http://arxiv.org/abs/2403.10641
Autor:
Villavicencio, Cristian, Raya, Alfredo
In this article we explore the effect of a quark chemical potential $\mu$ at zero temperature in the implementation of in-medium effects in Wilson coefficients and the perturbative sector in QCD sum rules. For this purpose, we explore the axial, axia
Externí odkaz:
http://arxiv.org/abs/2402.14137
Autor:
Ayala, Alejandro, Farias, Ricardo L. S., Hernández, L. A., Mizher, Ana Julia, Rendón, Javier, Villavicencio, Cristian, Zamora, R.
Publikováno v:
Phys. Rev. D 109, 074019 (2024)
We use the linear sigma model with quarks to study the magnetic-field-induced modifications on the longitudinal screening mass for the neutral pion at one-loop level. The effects of the magnetic field are introduced into the self-energy, which contai
Externí odkaz:
http://arxiv.org/abs/2311.13068
Publikováno v:
Phys. Rev. D 109, 034014 (2024)
Weak magnetic field induced corrections for the Yukawa potential due to one pion exchange between two constituent quarks (nucleons) are presented. For that, the constant magnetic field effect on the pion propagator and on the pion form factor are tak
Externí odkaz:
http://arxiv.org/abs/2308.12122
Publikováno v:
Phys. Rev. D 108 (2023) 074024
The nucleon axial-vector coupling constant $g_A$ is studied in the presence of an external magnetic field, and in dense nuclear environments, to emulate nuclear matter in magnetars. For this purpose we use QCD finite energy sum rules for two-current
Externí odkaz:
http://arxiv.org/abs/2308.05663
Autor:
Villavicencio, Cristian
The electric current density of fermions in the presence of an external electric field is determined through the utilization of a time-ordered Schwinger propagator. The study encompasses the necessary conditions for establishing a well-defined time-o
Externí odkaz:
http://arxiv.org/abs/2305.12271
Autor:
Villavicencio, Cristián
Publikováno v:
Phys. Rev. D 107, 076009 (2023)
The nucleon axial coupling constant $g_A$ is calculated in the presence of an external uniform magnetic field using finite energy sum rules. The correlation function of proton, neutron and axial-vector currents is calculated both the hadronic and the
Externí odkaz:
http://arxiv.org/abs/2212.04649
We study the combined effects of a finite volume and an external magnetic field on the charged two-pion correlation function. For these purposes, we consider a dilute system of pions where the finite volume effects are introduced computing the pion w
Externí odkaz:
http://arxiv.org/abs/2111.05951
We review the main features of the QCD phase diagram description, at finite temperature, baryon density and in the presence of a magnetic field, from the point of view of effective models, whose main ingredient is chiral symmetry. We concentrate our
Externí odkaz:
http://arxiv.org/abs/2104.05854
Publikováno v:
Phys. Rev. D 102, 094007 (2020)
Finite energy QCD sum rules involving nucleon current correlators are used to determine several QCD and hadronic parameters in the presence of an external, uniform, large magnetic field. The continuum hadronic threshold $s_0$, nucleon mass $m_N$, cur
Externí odkaz:
http://arxiv.org/abs/2008.10742