Origin of hadron spin based on Lattice QCD study on the charmed hadrons
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| Format: | Preprint |
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2024
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| _version_ | 1866912067774054400 |
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| author | He, Fangcheng Liang, Jian Yang, Yi-Bo |
| author_facet | He, Fangcheng Liang, Jian Yang, Yi-Bo |
| contents | We perform the first Lattice calculation about the charmed hadron spin decomposition using overlap fermions on a 2+1 flavor RBC/UKQCD domain-wall gauge configurations at 0.083 fm with 300 MeV pion mass. It is found that the contributions of quark spin to the spin of 1S, 1P charmonia and also proton-like triple heavy quark state are comparable with the expectation of non-relativistic quark model. Such an observation provides evidence that the non-triviality of proton spin decomposition mainly arises from the relativistic effects of the light quark. Conversely, the substantial gluon angular momentum contribution in the spin $(1/2)^+$ state with triple heavy quarks at the charm quark mass, remains significant, highlighting the ongoing importance of the gluon in the realm of charmed baryon physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_08046 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Origin of hadron spin based on Lattice QCD study on the charmed hadrons He, Fangcheng Liang, Jian Yang, Yi-Bo High Energy Physics - Lattice High Energy Physics - Phenomenology We perform the first Lattice calculation about the charmed hadron spin decomposition using overlap fermions on a 2+1 flavor RBC/UKQCD domain-wall gauge configurations at 0.083 fm with 300 MeV pion mass. It is found that the contributions of quark spin to the spin of 1S, 1P charmonia and also proton-like triple heavy quark state are comparable with the expectation of non-relativistic quark model. Such an observation provides evidence that the non-triviality of proton spin decomposition mainly arises from the relativistic effects of the light quark. Conversely, the substantial gluon angular momentum contribution in the spin $(1/2)^+$ state with triple heavy quarks at the charm quark mass, remains significant, highlighting the ongoing importance of the gluon in the realm of charmed baryon physics. |
| title | Origin of hadron spin based on Lattice QCD study on the charmed hadrons |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.08046 |