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Wang GY, Wei NC, Yang HM, Wang E, Geng LS, Xie JJ. Roles of
a0(980)
,
Λ(1670)
, and
Σ(1385)
in the
Λc+→ηΛπ+
decay. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.106.056001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Xie JJ, Geng LS, Guo FK. Role of N*(1535) in the Λ +c → K 0ηp decay and the possible фp state in the Λ +c → π 0фp decay. EPJ WEB OF CONFERENCES 2020. [DOI: 10.1051/epjconf/202024102010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The nonleptonic weak decays of Λ+c → K0ηp and Λ+c → π0фp are investigated from the viewpoint of probing the N*(1535) resonance and the possible фp state. For the Λ+c → K0ηp decay, we study the invariant mass distribution of ηp with both the chiral unitary approach and an effective Lagrangian model. Within the chiral unitary approach, the N*(1535) resonance is dynamically generated from the final state interaction of mesons and baryons in coupled channels. While for the effective Lagrangian model, we take a Breit-Wigner formula for the N*(1535) resonance. We found that the behavior of the N*(1535) resonance in the Λ+c → K0N*(1535) → K0ηp decay within the two approaches is different. For the Λ+c → π0фp decay, we consider a triangle singularity mechanism, where the Λ+c decays into the K*Σ*(1385), the Σ*(1385) decays into the π0Σ/Λ, and then the K*Σ/Λ merge to produce the фp in the final state. This mechanism produces a peak structure around 2020 MeV. In addition, the possibility that there is a hidden-strange pentaquark-like state is also considered by taking into account the final state interactions of K*Λ, K*Σ, and фp. We conclude that it is difficult to search for the hidden-strange state in this decay. However, we do expect nontrivial behavior in the фp invariant mass distribution. The proposed Λ+c decay mechanism here can provide valuable information on the properties of these nuclear resonances and can in principle be tested by experiments such as BESIII, LHCb and Belle-II.
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Magas V, Feijoo A, Oset E, Ramos A. Traces of the hidden-charm S=−1 pentaquark in the Λ b→ J/Ψ ηΛ decay. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201713706015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Oset E, Chen HX, Feijoo A, Geng LS, Liang WH, Li DM, Lu JX, Magas VK, Nieves J, Ramos A, Roca L, Wang E, Xie JJ. Predictions for pentaquark states of hidden charm molecular nature and comparison with experiment. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201613006004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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