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dc.contributor.author | Aoki, Sinya | en |
dc.contributor.author | Aoki, Takafumi | en |
dc.contributor.alternative | 青木, 愼也 | ja |
dc.contributor.alternative | 青木, 孝史 | ja |
dc.date.accessioned | 2023-10-23T05:03:08Z | - |
dc.date.available | 2023-10-23T05:03:08Z | - |
dc.date.issued | 2022 | - |
dc.identifier.uri | http://hdl.handle.net/2433/285589 | - |
dc.description | The 39th International Symposium on Lattice Field Theory (LATTICE2022) | en |
dc.description.abstract | We investigate a doubly-bottomed tetraquark state $T_{bb}$ $(bb bar{u}bar{d})$ with quantum number $I(J^P)=0(1^+)$ in $(2+1)$-flavor lattice QCD. Using the Non-Relativistic QCD (NRQCD) quark action for $b$ quarks, we have extracted the coupled channel potential between $bar{B}bar{B}^*$ and $bar{B}^* bar{B}^*$ in the HAL QCD method at $a approx 0.09$ {fm} on $32^3times 64$ lattices. The potential predicts an existence of a bound $T_{bb}$ below the $bar{B}bar{B}^*$ threshold. At the physical pion mass $m_piapprox140$ {MeV} extrapolated from $m_piapprox 410, , 570, , 700$ {MeV}, a binding energy with its statistical error is given by $E_{rm binding}^{rm (coupled)} = 83(10)$ MeV from a coupled channel analysis where effects due to virtual $bar{B}^* bar{B}^*$ states are included through the coupled channel potential, while we obtain $E_{rm binding}^{rm (single)} = 155(17)$ MeV only from a potential for a single $bar{B}bar{B}^*$ channel. This difference indicates that the effect from virtual $bar{B}^* bar{B}^*$ states is sizable to the binding energy of $T_{bb}$. Adding $pm 20$ MeV as empirical systematic error caused by the NRQCD approximation for $b$ quarks, our estimate of the $T_{bb}$ binding energy becomes $83(10)(20)$ MeV. | en |
dc.language.iso | eng | - |
dc.publisher | Sissa Medialab | en |
dc.rights | © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). | en |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.title | Lattice study on a tetraquark state $T_{bb}$ in the HAL QCD method | en |
dc.type | conference paper | - |
dc.type.niitype | Conference Paper | - |
dc.identifier.jtitle | Proceedings of The 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022) | en |
dc.relation.doi | 10.22323/1.430.0049 | - |
dc.textversion | publisher | - |
dc.identifier.artnum | 049 | - |
dcterms.accessRights | open access | - |
datacite.awardNumber | 16H03978 | - |
datacite.awardNumber | 18H05236 | - |
datacite.awardNumber.uri | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16H03978/ | - |
datacite.awardNumber.uri | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18H05236/ | - |
jpcoar.funderName | 日本学術振興会 | ja |
jpcoar.funderName | 日本学術振興会 | ja |
jpcoar.awardTitle | 格子QCDによるハドロン間ポテンシャルの研究の発展 | ja |
jpcoar.awardTitle | クォークから中性子星へ:QCDの挑戦 | ja |
出現コレクション: | 学術雑誌掲載論文等 |
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