A search for Bs0∗ and Bs1∗ through the K-p interaction.
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| Title: | A search for Bs0∗ and Bs1∗ through the K-p interaction. |
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| Authors: | Yuan, Min1 (AUTHOR) yuanm@my.swjtu.edu.cn, Huang, Yin1 (AUTHOR) huangy2019@swjtu.edu.cn |
| Source: | European Physical Journal C -- Particles & Fields. Mar2026, Vol. 86 Issue 3, p1-9. 9p. |
| Subjects: | Particle interactions, Nuclear cross sections, Heavy quark effective theory, Scattering (Physics), Mesons, Particle physics |
| Abstract: | Studying heavy-quark hadrons is crucial due to the nonperturbative nature of low-energy QCD, with Heavy-Quark Symmetry (HQS) serving as a key framework for understanding their spin and flavor symmetries. However, a key issue is that the theoretically expected B (∗) K ¯ molecular states have not yet been observed, although they are considered the bottom-quark counterparts of the observed D ¯ (∗) K ¯ molecular states (corresponding to D s 0 (2317 / 2460) - ), which challenges the universality of HQS. The main goal of this work is to search for the theoretically predicted B K ¯ and B ∗ K ¯ molecular states, namely B s 0 ∗ (5725) and B s 1 ∗ (5778) , via the reactions K - p → Λ b 0 B s 0 ∗ and K - p → Λ b 0 B s 1 ∗ . Within an effective Lagrangian framework, we compute the relevant cross sections, considering t-channel B (∗) exchanges and K - p initial-state interactions (ISI). The results show that the production cross sections of B s 0 ∗ (5725) and B s 1 ∗ (5778) can reach the order of 0.01 nb, and we suggest that experiments searching for B s 0 ∗ (5725) are best performed at P K - = 12.18 GeV , while higher energies are most favorable for producing B s 1 ∗ (5778) . The ISI play a crucial role, as they not only significantly enhance the production cross sections of B s 0 ∗ (5725) and B s 1 ∗ (5778) (by roughly one order of magnitude) but also markedly affect the angular distributions of the produced particles. We also calculated the production cross sections of the conventional quark–antiquark states B s 0 ∗ (5700) and B s 1 ∗ (5720) , which are found to be nearly the same as those of B s 0 ∗ (5725) and B s 1 ∗ (5778) . Although their internal structures remain ambiguous, these results can inform future experimental searches at CERN and J-PARC. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Studying heavy-quark hadrons is crucial due to the nonperturbative nature of low-energy QCD, with Heavy-Quark Symmetry (HQS) serving as a key framework for understanding their spin and flavor symmetries. However, a key issue is that the theoretically expected B (∗) K ¯ molecular states have not yet been observed, although they are considered the bottom-quark counterparts of the observed D ¯ (∗) K ¯ molecular states (corresponding to D s 0 (2317 / 2460) - ), which challenges the universality of HQS. The main goal of this work is to search for the theoretically predicted B K ¯ and B ∗ K ¯ molecular states, namely B s 0 ∗ (5725) and B s 1 ∗ (5778) , via the reactions K - p → Λ b 0 B s 0 ∗ and K - p → Λ b 0 B s 1 ∗ . Within an effective Lagrangian framework, we compute the relevant cross sections, considering t-channel B (∗) exchanges and K - p initial-state interactions (ISI). The results show that the production cross sections of B s 0 ∗ (5725) and B s 1 ∗ (5778) can reach the order of 0.01 nb, and we suggest that experiments searching for B s 0 ∗ (5725) are best performed at P K - = 12.18 GeV , while higher energies are most favorable for producing B s 1 ∗ (5778) . The ISI play a crucial role, as they not only significantly enhance the production cross sections of B s 0 ∗ (5725) and B s 1 ∗ (5778) (by roughly one order of magnitude) but also markedly affect the angular distributions of the produced particles. We also calculated the production cross sections of the conventional quark–antiquark states B s 0 ∗ (5700) and B s 1 ∗ (5720) , which are found to be nearly the same as those of B s 0 ∗ (5725) and B s 1 ∗ (5778) . Although their internal structures remain ambiguous, these results can inform future experimental searches at CERN and J-PARC. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346044 |
| DOI: | 10.1140/epjc/s10052-026-15495-5 |
