Gravitational formfactors of the rho, pi, and K mesons in the light-cone QCD sum rules

Aliev T., Barakat T., Simsek K.

PHYSICAL REVIEW D, vol.103, no.5, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 103 Issue: 5
  • Publication Date: 2021
  • Doi Number: 10.1103/physrevd.103.054001
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH
  • Middle East Technical University Affiliated: Yes

Abstract

By using the quark part of the energy-momentum tensor current, the gravitational formfactors of the rho, pi, and K mesons are calculated within the light-cone sum rules method. In the considered version, the energy-momentum tensor current is not conserved and as a result, for integer spin J, there appear 4J + 2 (2J + 1) formfactors, which correspond to the conservation (nonconservation) of the energy-momentum tensor current. The average mass radius of rho, pi, and K mesons as well as the gravitational quadrupole moment of the rho meson are calculated. We also compare our results with the one existing in the literature on these quantities.