Strangeness+1 light multiquark baryons

Autor(es)

Malabarba, Brenda B. ; Khemchandani, K. P. ; Torres, A. Martinez ; Nam, Seung-il

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 111, n. 1, p. 17-pg., 2025-01-21.

Resumo

In view of the renewing experimental interest for searching strangeness +1 baryons at J-PARC, we study the existence of light baryon resonances with strangeness +1 generated in the K - (N*/Delta*) system, where N* represents either N*(1535)/N*(1650)/N*(1700), and Delta* corresponds to Delta(1620). The description of the properties of the aforementioned states requires considering the dynamics involved in the coupled pseudoscalar-baryon (PB) and vector-baryon (VB) systems with strangeness S = 0 in the s wave. For the purpose of our current study, we consider the PB and VB channels to which the mentioned N* and Delta* resonances couple and solve the Faddeev equations for the coupled channel system K-PB, K-VB, with all interactions being in the s wave. Despite some strong attraction present in two of the subsystems, we do not find clear evidence supporting the formation of strangeness +1 states, with spin-parity JP = 1/2+, in the energy region 2000-2200 MeV. However, the case of spin-parity JP = 3/2+ seems more promising, showing the formation of a resonance with a mass around 2167 MeV, with a width of 90-100 MeV. We suggest that a signal of such a state could be found in processes with final states like KN, K*(892)N. (AU)

• Processo FAPESP: 22/08347-9 - Hádrons novos e enigmáticos
• Beneficiário: Kanchan Pradeepkumar Khemchandani
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/00676-8 - Estados exóticos de três-hádrons com estranheza
• Beneficiário: Brenda Bertotto Malabarba
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 23/01182-7 - Física de hádrons exóticos
• Beneficiário: Alberto Martinez Torres
• Modalidade de apoio: Auxílio à Pesquisa - Regular