Placing of the recently observed bottom strange states BsJ(6063) and BsJ(6114) in bottom spectra

Abstract

Abstract We employ the heavy quark effective theory (HQET) to give spin-parity quantum numbers for the bottom strange states BsJ(6063) and BsJ(6114) recently observed by the LHCb Collaboration [9]. By exploring flavor-independent parameters $\Delta _{F}^{(c)} =\Delta _{F}^{(b)}$ and $\lambda _{F}^{(c)} = \lambda _{F}^{(b)}$ appearing in the HQET Lagrangian, we calculate the masses of the experimentally missing bottom strange meson states 2S, 1P, 1D. The parameter ΔF appears in the HQET Lagrangian and gives the spin-averaged mass splitting between excited-state doublets (F) and ground-state doublets (H). Another parameter λF comes from first-order corrections in the HQET Lagrangian and gives hyperfine splittings. We also analyze these bottom strange masses by taking 1/mQ corrections, which lead to modifications of parameter terms of $\Delta _{F}^{(b)} =\Delta _{F}^{(c)} + \delta \Delta _F$ and $\lambda _{F}^{(b)} = \lambda _{F}^{(c)}\delta \lambda _F$. Further, we analyze their two-body decays, couplings, and branching ratios via the emission of light pseudoscalar mesons. Based on the predicted masses and decay widths, we tentatively identify the states BsJ(6063) as 23S1 and BsJ(6114) as 13D1. Our predictions provide crucial information for future experimental studies.