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October 14, 2024 to November 15, 2024
YITP
Asia/Tokyo timezone

Gravitational form factors and Mechanical properties of nucleon

Oct 25, 2024, 11:00 AM
1h
Panasonic Auditorium, Yukawa Hall (YITP)

Panasonic Auditorium, Yukawa Hall

YITP

1st and 2nd weeks (Hadron structure and interactions) Seminar (1,2 week)

Speaker

Hyun-Chul Kim (Inha University)

Description

The gravitational form factors of the proton provide essential information on its mechanical structure such as its mass, spin, mechanical pressure, and shear force. In the current talk, we present a series of recent results for the flavor decomposition of the gravitational form factors~(GFFs) of the proton in a pion mean-field approach or the chiral quark-soliton model. We analyze problems arising from the flavor decomposition of the mass distribution, as evidenced through the non-conserved $\bar{c}(q^2)$ form factor of the nucleon. We discuss subtle points related to the twist-2 and twist-4 contributions to the flavor-decomposed masses and $\bar{c}$ form factors. We study not only the decomposition of the total angular momentum into the orbital angular momentum and intrinsic spin, but also its flavor decomposition. We then examine the intricate interplay between the $D$-term and $\bar{c}$ form factors and their collaborative impact on the stabilization of the nucleon system. Questioning the assumption of`large $N_{c}$ blindness'' concerning $D^{u-d} \sim 0$ in a recent experimental analysis, we compute it within both the flavor SU(2) and SU(3) framework. We conclude that such an assumption finds justification
predominantly within the framework of flavor SU(3) symmetry.

Primary author

Hyun-Chul Kim (Inha University)

Presentation materials