2016/06/22 by Anita Prapotnik Brdnik, Brdnik, Anita Prapotnik, Svjetlana Fajfer +1
Physics and Astronomy · #Black Holes and Theoretical Physics #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.1606.06943
openalex publication_date 2016/06/22 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
Recent lattice QCD results suggest that the masses of the first two positive parity Bs mesons lie below the BK threshold, similar to the case of D^*s0(2317)+ and Ds1(2460)+ mesons. The mass spectrum of Bs mesons seems to follow pattern of Ds mass spectrum. As in the case of charmed mesons, the structure of positive parity Bs mesons is very intriguing. To shed more light on this issue, we investigate strong isospin violating decays Bs(0+) → Bs0 π0, Bs(1+) → Bs*0 π0 and Bs(1+) → Bs0 ππ within heavy meson chiral perturbation theory. The two body decay amplitude arises at the tree level and we show that the loop corrections give significant contributions. On the other hand, in the case of three body decay Bs(1+) → Bs0 ππ amplitude occurs only at the loop level. We find that the decay widths for these decays are: Γ(Bs(1+) → Bs0 ππ)∼ 10-3 keV and Γ(Bs(0+) → Bs0 π0) ≤ 55 keV, Γ(Bs(1+) → Bs*0 π0) ≤ 50 keV. More precise knowledge of the coupling constant describing the interaction of positive and negative parity heavy mesons with light pseudoscalar mesons would help to increase accuracy of our calculation.