20.500.12556/DKUM-66444 Isospin violating decays of positive parity Bs mesons in HMχPT 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 the pattern of a 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 the strong isospin violating decays B∗0s0→B0sπ0, B0s1→B∗0sπ0, and B0s1→B0sππ within heavy meson chiral perturbation theory. The two-body decay amplitude arises at tree level and we show that the loop corrections give significant contributions. On the other hand, in the case of three-body decay B0s1→B0sππ the amplitude occurs only at loop level. We find that the decay widths for these decays are Γ(B0s1→B0sππ)∼10−3 keV, and Γ(B∗0s0→B0sπ0)≤55 keV, Γ(B0s1→B∗0sπ0)≤50 keV. More precise knowledge of the coupling constant describing the interaction of positive and negative parity heavy mesons with light pseudo-scalar mesons would help to increase the accuracy of our calculation. physics elementary particles B mesons decays fizika elementarni delci mezoni B true false true Angleški jezik Slovenski jezik Znanstveno delo 2017-06-26 12:43:56 2017-06-26 12:46:52 2022-07-11 03:07:00 2019-07-11 15:47:42 2016 0 0 str. 1-11 Letn. 76 Oct. 2016 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1434-6044 539.12 634468 3014756 10.1140/epjc/s10052-016-4377-1 1434-6044 URN:SI:UM:DK:PEJ9NQLO European_Physical_Journal_C_2016_Fajfer,_Prapotnik_Brdnik_Isospin_violating_decays_of_positive_parity_Bs_mesons_in_HMχPT.pdf European_Physical_Journal_C_2016_Fajfer,_Prapotnik_Brdnik_Isospin_violating_decays_of_positive_parity_Bs_mesons_in_HMχPT.pdf 1 DAABF9F3FBA260C64EF20251DF6975C1 1b75d25d15a62e3ab0c0bd74ea519c1de644f99f8039e5d61a064203530c9665 4d404664-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=113146 http://link.springer.com/10.1140/epjc/s10052-016-4377-1 1 https://dk.um.si/Dokument.php?lang=slv&id=113144 Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo 0 0 0