Thermo-magnetic behavior of the quark-gluon vertex

被引：0

作者：

Ayala, Alejandro ^{[1
,2
,3
]}

Cobos-Martinez, J. J. ^{[4
]}

Loewe, M. ^{[2
,3
,5
,6
]}

Elena Tejeda-Yeomans, Maria ^{[1
,7
]}

Zamora, R. ^{[5
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Apartado Postal 70-543, Mexico City 04510, DF, Mexico

[2] Univ Cape Town, Ctr Theoret & Math Phys, ZA-7700 Rondebosch, South Africa

[3] Univ Cape Town, Dept Phys, ZA-7700 Rondebosch, South Africa

[4] Univ Michoacana, Inst Fis & Matemat, Edificio C-3,Ciudad Univ, Morelia 58040, Michoacan, Mexico

[5] Pontificia Univ Catolica Chile, Inst Fis, Casilla 306, Santiago 22, Chile

[6] Ctr Cient Tecnol Valparaiso, Casilla 110-V, Valparaiso, Chile

[7] Univ Sonora, Dept Fis, Colonia Ctr, Blvd Luis Encinas & Rosales, Hermosillo 83000, Sonora, Mexico

来源：

NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS | 2016年 / 270卷

关键词：

Chiral transition; Magnetic Field; Quark-gluon vertex; Quark anomalous magnetic moment;

D O I：

10.1016/j.nuclphysbps.2016.02.037

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The thermo-magnetic corrections to the quark-gluon vertex in the presence of a weak magnetic field are calculated in the frame of the Hard Thermal Loop approximation. The vertex satisfies a QED-like Ward identity with the quark self-energy calculated within the same approximation. It turns out that only the longitudinal vertex components get modified. The calculation provides a first principles result for the quark anomalous magnetic moment at high temperature in a weak magnetic field. The effective thermo-magnetic quark-gluon coupling shows a decreasing behavior as function of the field strength. This result supports the observation that the behavior of the effective quark-gluon coupling in the presence of a magnetic field is an important ingredient in order to understand the inverse magnetic catalysis phenomenon recently observed in the lattice QCD simulations.

引用

页码：185 / 189

页数：5

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