The impact of quark many-body effects on exotic hadrons
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929358973698048 |
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| author | Takeuchi, Sachiko Takizawa, Makoto Yamaguchi, Yasuhiro Hosaka, Atsushi |
| author_facet | Takeuchi, Sachiko Takizawa, Makoto Yamaguchi, Yasuhiro Hosaka, Atsushi |
| contents | We investigate the exotic hadrons consisting of two light quarks and two heavy antiquarks, $(q\bar Q)$-$(q\bar Q)$. The spin-dependent term between quarks is known to give an attraction to the $ud$ spin-0 component in the isospin-0 $u\bar c d\bar c$ system, $T_{cc}$. However, the said component also gets a repulsion from the partial Pauli-blocking. By the dynamical calculation with a simplified quark model, we discuss that the competition of the two effects leads to a shallow bound state for $T_{cc}$, which is preferred from the experiment, and a deep bound state for $T_{bb}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_11552 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The impact of quark many-body effects on exotic hadrons Takeuchi, Sachiko Takizawa, Makoto Yamaguchi, Yasuhiro Hosaka, Atsushi High Energy Physics - Phenomenology We investigate the exotic hadrons consisting of two light quarks and two heavy antiquarks, $(q\bar Q)$-$(q\bar Q)$. The spin-dependent term between quarks is known to give an attraction to the $ud$ spin-0 component in the isospin-0 $u\bar c d\bar c$ system, $T_{cc}$. However, the said component also gets a repulsion from the partial Pauli-blocking. By the dynamical calculation with a simplified quark model, we discuss that the competition of the two effects leads to a shallow bound state for $T_{cc}$, which is preferred from the experiment, and a deep bound state for $T_{bb}$. |
| title | The impact of quark many-body effects on exotic hadrons |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2405.11552 |