Communication Dans Un Congrès Année : 2025

Gravitational form factors of the nucleon and their mechanical structure: Twist-2 case

Hyun-Chul Kim
  • Fonction : Auteur
June-Young Kim
  • Fonction : Auteur

Résumé

We present a series of recent works on the gravitational form factors (GFFs) of the nucleon within a pion mean-field approach, which is also called the chiral quark-soliton model. We investigate the flavor structure of the mass, angular momentum, and $D$-term form factors of the nucleon. The main findings of the present work are given as follows: the contribution of the strange quark is rather small for the mass and angular momentum form factors, it plays an essential role in the $D$-term form factors. It indicates that the $D$-term form factor is sensitive to the outer part of the nucleon. The flavor blindness, i.e, $D^{u-d}\simeq 0$, is valid only if the strange quark is considered. We also discuss the effects of twist-4 operators. Though the gluonic contributions are suppressed by the packing fraction of the instanton vacuum in the twist-2 case, contributions from twist-4 operators are significant.

Dates et versions

hal-05038113 , version 1 (17-04-2025)

Identifiants

Citer

Hyun-Chul Kim, June-Young Kim, Ho-Yeon Won. Gravitational form factors of the nucleon and their mechanical structure: Twist-2 case. 16th Conference on Quark Confinement and the Hadron Spectrum, Aug 2024, Cairns, Australia. pp.074, ⟨10.22323/1.483.0074⟩. ⟨hal-05038113⟩
10 Consultations
0 Téléchargements

Altmetric

Partager

  • More