Gravitational form factor $D$ of charmonium from shear stress
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912346704707584 |
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| author | Hu, Tianyang Cao, Xianghui Xu, Siqi Li, Yang Zhao, Xingbo Vary, James P. |
| author_facet | Hu, Tianyang Cao, Xianghui Xu, Siqi Li, Yang Zhao, Xingbo Vary, James P. |
| contents | Based on our recent analysis of the hadronic matrix element of the stress-energy tensor in covariant light front dynamics, we extract the charmonium gravitational form factor $D(Q^2)$ from shear stress $T^{12}$. This is in contrast to our recent work using the (light-front) energy density $T^{+-}$. Indeed, by comparing these two currents, we identify terms that are responsible for the violation of the current conservation. Numerical results based on basis light-front quantization show that the violation effects are small and the $D$-term extracted from the two currents are close to each other, hence validating our previous work using $T^{+-}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09689 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gravitational form factor $D$ of charmonium from shear stress Hu, Tianyang Cao, Xianghui Xu, Siqi Li, Yang Zhao, Xingbo Vary, James P. High Energy Physics - Phenomenology Nuclear Theory Based on our recent analysis of the hadronic matrix element of the stress-energy tensor in covariant light front dynamics, we extract the charmonium gravitational form factor $D(Q^2)$ from shear stress $T^{12}$. This is in contrast to our recent work using the (light-front) energy density $T^{+-}$. Indeed, by comparing these two currents, we identify terms that are responsible for the violation of the current conservation. Numerical results based on basis light-front quantization show that the violation effects are small and the $D$-term extracted from the two currents are close to each other, hence validating our previous work using $T^{+-}$. |
| title | Gravitational form factor $D$ of charmonium from shear stress |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2408.09689 |