Investigation on the from QCD sum rules

QCD和則によるの研究

Su, N.*; Chen, H.-X.*; Gubler, P.; Hosaka, Atsushi

We study the recently observed baryon in quantum chromodynamics (QCD) sum rules. We construct the P-wave baryon currents with a covariant derivative, and perform spin projection to obtain the currents with total spin 1/2 and 3/2. We then apply the parity-projected QCD sum rules to separate the contributions of the positive and negative parity states. We extract the masses of $J^P = 1/2^{-}$ and $3/2^{-}$ states to be $M_{1/2^-} = 2.07^{+0.07}_{-0.07}$ GeV and $M_{3/2^-} = 2.05^{+0.09}_{-0.10}$ GeV. Both results are in good agreement with the experimental result. Therefore, it is likely that the is a negative parity state, which is interpreted as a P-wave excited state in the quark model. However, its spin is not determined in the present analysis, which can be done by detailed study on its decay properties.

発表言語	:	English
掲載資料名	:	Physical Review D
巻	:	110
号	:	3
ページ数	:	p.034007_1 - 034007_9
発行年月	:	2024/08
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キーワード	:	Omega Baryons; QCD sum rules

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論文URL	:	https://doi.org/10.1103/PhysRevD.110.034007
研究データの公開先DOI	:	本成果にかかわる研究データのリンクです。
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受委託・共同研究相手機関	:	大阪大学核物理研究センター; Southeast University

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InCites™	:	パーセンタイル：68.14 分野：Astronomy & Astrophysics
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登録番号 : AA20240463
抄録集掲載番号 : 53000332
論文投稿番号 : 29125

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