Dressed quark tensor vertex and nucleon tensor charge

Langtian Liu, Lei Chang, and Yu-xin Liu
Phys. Rev. D 99, 074013 – Published 12 April 2019

Abstract

We construct directly the quark-antiquark scattering kernels of Bethe-Salpeter equation from the quark self-energy, under two specific forms of quark-gluon vertices. The quark dressed tensor vertex is then calculated within this consistent framework and rainbow-ladder (RL) approximation. After employing a simplified nucleon model, the nucleon tensor charge can be defined with the tensor vertex. We then compute the tensor charge with the bare tensor vertex and the dressed vertices obtained in this framework and in the RL approximation. The obtained results are consistent with the lattice QCD calculations. We also find that typically the gluon dressing effects suppress the nucleon tensor charge compared to the bare tensor vertex, by about 23% for the RL approximation, and turn out to be about 13% in this framework.

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  • Received 21 January 2019

DOI:https://doi.org/10.1103/PhysRevD.99.074013

© 2019 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Nuclear Physics

Authors & Affiliations

Langtian Liu1, Lei Chang2, and Yu-xin Liu1,3,4

  • 1Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 2School of Physics, Nankai University, Tianjin 300071, China
  • 3Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 4Center for High Energy Physics, Peking University, Beijing 100871, China

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Issue

Vol. 99, Iss. 7 — 1 April 2019

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