Tensor Resonance in $J/ψJ/ψ$ Scattering from Lattice QCD
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915313232117760 |
|---|---|
| author | Li, Geng Shi, Chunjiang Chen, Ying Sun, Wei |
| author_facet | Li, Geng Shi, Chunjiang Chen, Ying Sun, Wei |
| contents | The $S$-wave scattering amplitudes of $J/ψJ/ψ$ with quantum numbers $J^{PC} = 0^{++}$ and $2^{++}$ are determined up to 6600\,MeV using lattice QCD calculations at $m_π\approx 420$ and 250\,MeV. The ${}^1S_0$ $J/ψJ/ψ$ system exhibits a near-threshold attractive interaction, resulting in a virtual bound state with a binding energy of approximately 30-40\,MeV. In contrast, the ${}^5S_2$ $J/ψJ/ψ$ system exhibits a repulsive interaction near threshold. These behaviors are primarily dominated by the quark rearrangement effect. Most notably, a resonance is observed in the ${}^5S_2$ $J/ψJ/ψ$ channel, with a mass around 6540\,MeV and a width of approximately 540\,MeV. The extracted mass and width are consistent with the $X(6600)$ (or $X(6400)$) observed by the ATLAS and CMS collaborations, and show little dependence on the sea pion mass. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_24213 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tensor Resonance in $J/ψJ/ψ$ Scattering from Lattice QCD Li, Geng Shi, Chunjiang Chen, Ying Sun, Wei High Energy Physics - Lattice The $S$-wave scattering amplitudes of $J/ψJ/ψ$ with quantum numbers $J^{PC} = 0^{++}$ and $2^{++}$ are determined up to 6600\,MeV using lattice QCD calculations at $m_π\approx 420$ and 250\,MeV. The ${}^1S_0$ $J/ψJ/ψ$ system exhibits a near-threshold attractive interaction, resulting in a virtual bound state with a binding energy of approximately 30-40\,MeV. In contrast, the ${}^5S_2$ $J/ψJ/ψ$ system exhibits a repulsive interaction near threshold. These behaviors are primarily dominated by the quark rearrangement effect. Most notably, a resonance is observed in the ${}^5S_2$ $J/ψJ/ψ$ channel, with a mass around 6540\,MeV and a width of approximately 540\,MeV. The extracted mass and width are consistent with the $X(6600)$ (or $X(6400)$) observed by the ATLAS and CMS collaborations, and show little dependence on the sea pion mass. |
| title | Tensor Resonance in $J/ψJ/ψ$ Scattering from Lattice QCD |
| topic | High Energy Physics - Lattice |
| url | https://arxiv.org/abs/2505.24213 |