Gravitational form factors of charmonium on the light front

by Tianyang Hu (IMP)

Wednesday Oct 9, 2024, 9:00 PM → 9:45 PM Asia/Shanghai

We investigate the internal stress of charmonium using the recently derived light-front wave function representation. We employ three "good components" of the energy-momentum tensor, $T^{++}$, $T^{+-}$, and $T^{12}$, to extract the gravitational form factors. The obtained form factors satisfy the known constraints and are used to derive the physical distributions of the system. We discover tantalizing evidence of a tachyonic core within $\eta_c$. Additionally, we find an attractive core within $\chi_{c0}$, contradicting the speculation based on mechanical stability that a stable system must have a repulsive core.

 

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ZOOM ID:84390108770

Password: 482223

Meeting link
https://us02web.zoom.us/j/84390108770?pwd=0WXWMctbLWFvEb6HmcXpULUvrmUgbf.1