Investigation on the $Ω(2012)$ from QCD sum rules
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929520780509184 |
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| author | Su, Niu Chen, Hua-Xing Gubler, Philipp Hosaka, Atsushi |
| author_facet | Su, Niu Chen, Hua-Xing Gubler, Philipp Hosaka, Atsushi |
| contents | We investigate the recently observed $Ω(2012)$ baryon using QCD sum rules. By constructing $P$-wave $Ω$ baryon currents and performing spin projection and parity projection, we obtain the masses of the $J^P = 1/2^-$ and $3/2^-$ states as $M_{1/2^-} = 2.07^{+0.07}_{-0.07}{\rm~GeV}$ and $M_{3/2^-} = 2.05^{+0.09}_{-0.10}{\rm~GeV}$ in good agreement with experiment. This suggests that $Ω(2012)$ is likely to be a negative parity $P$-wave excited state, though its spin remains undetermined and requires further study of its decay properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_19843 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Investigation on the $Ω(2012)$ from QCD sum rules Su, Niu Chen, Hua-Xing Gubler, Philipp Hosaka, Atsushi High Energy Physics - Phenomenology We investigate the recently observed $Ω(2012)$ baryon using QCD sum rules. By constructing $P$-wave $Ω$ baryon currents and performing spin projection and parity projection, we obtain the masses of the $J^P = 1/2^-$ and $3/2^-$ states as $M_{1/2^-} = 2.07^{+0.07}_{-0.07}{\rm~GeV}$ and $M_{3/2^-} = 2.05^{+0.09}_{-0.10}{\rm~GeV}$ in good agreement with experiment. This suggests that $Ω(2012)$ is likely to be a negative parity $P$-wave excited state, though its spin remains undetermined and requires further study of its decay properties. |
| title | Investigation on the $Ω(2012)$ from QCD sum rules |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2409.19843 |