The T_cs(2900) as a threshold effect from the interaction of the D^*K^*, D^*_sρ channels

2023/10/15 by R. Molina, E. Oset, Molina, R. +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2310.09794

openalex publication_date 2023/10/15 · openalex created_date 2023/10/18 · openalex updated_date 2026/07/28

Abstract

We investigate the D^*K^* and D^*_sρ interaction in coupled channels within the hidden gauge formalism. A structure is developed around their thresholds, short of producing a bound state, which leads to a peak in the D_s⁺ π^- mass distribution in the B⁰ → D⁰ D_s⁺ π^- decay compatible with the experimental data. We conclude that the interaction between the D^*K^* and D^*_sρ is essential to produce the cusp structure that we associate to the recently seen T_cs(2900), and that its experimental width is mainly due to the decay width of the ρ meson. The peak obtained together with a smooth background reproduces fairly well the experimental mass distribution observed in the B₀ → D⁰ D_s⁺ π^- decay.

Related

• Coupled-channel D^∗ K^∗ -D_s^∗ ρ interactions and the origin of T_cs0(2900)
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