Λ_b → π^- (D_s^-) Λ_c(2595),~π^- (D_s^-) Λ_c(2625) decays and DN,~D^*N molecular components

2016/10/26 by Wei-Hong Liang, Liang, Wei-Hong, M. Bayar +3
Medicine · Physics and Astronomy · #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1610.08296

Abstract

From the perspective that the Λ_c(2595) and Λ_c(2625) are dynamically generated resonances from the DN,~D^*N interaction and coupled channels, we have evaluated the rates for Λ_b → π^- Λ_c(2595) and Λ_b → π^- Λ_c(2625) up to a global unknown factor that allows us to calculate the ratio of rates and compare with experiment, where good agreement is found. Similarly, we can also make predictions for the ratio of rates of the, yet unknown, decays of Λ_b → D_s^- Λ_c(2595) and Λ_b → D_s^- Λ_c(2625) and make estimates for their individual branching fractions.

Related

• Predictions for Ξ_b^- → π^- (D_s^- ) Ξ_c⁰ (2790) (Ξ_c⁰ (2815) ) and Ξ_b^- → ν_l l Ξ_c⁰ (2790) (Ξ_c⁰ (2815) )
• First measurements of the absolute branching fraction of Λ_c(2625)⁺→ Λ⁺_cπ⁺π^- and upper limit on Λ_c(2595)⁺→ Λ⁺_cπ⁺π^-
• Λ_c(2910) and Λ_c(2940) productions in π^- p scattering process
• Calculation of the ratios and absolute rates of the Ξ_b^- → π^- (D_s^- ) Ξ_c⁰ (2790) (Ξ_c⁰ (2815) ) and Ξ_b^- → ν_l l Ξ_c⁰ (2790) (Ξ_c⁰ (2815) ) decays
• Λ_b decays into Λ_c^*ℓν_ℓ and Λ_c^*π^- [Λ_c^*=Λ_c(2595) & Λ_c(2625)] and heavy quark spin symmetry