Towards establishing an abundant $B$ and $B_s$ spectrum up to the second orbital excitations

Abstract

Stimulated by the exciting progress in experiments, we carry out a combined analysis of the masses, and strong and radiative decay properties of the $B$ and $B_s$-meson states up to the second orbital excitations. Based on our good descriptions of the mass and decay properties for the low-lying well-established states $B_1(5721)$, $B_2^{\ast }(5747)$, $B_{s1}(5830)$ and $B_{s2}^{\ast }(5840)$, we give a quark model classification for the high mass resonances observed in recent years. It is found that (i) the $B_J(5840)$ resonance may be explained as the low mass mixed state $B(|SD{⟩}_L)$ via $2^3{S}_1$-$1^3{D}_1$ mixing, or the pure $B(2^3{S}_1)$ state, or $B(2^1{S}_0)$. (ii) The $B_J(5970)$ resonance may be assigned as the $1^3{D}_3$ state in the $B$ meson family, although it as a pure $2^3{S}_1$ state cannot be excluded. (iii) The narrow structure around 6064 MeV observed in the $B^{+}{K}^{-}$ mass spectrum at LHCb may be mainly caused by the $B_{sJ}(6109)$ resonance decaying into $B^{\ast +}{K}^{-}$, and favors the assignment of the high mass $1D$-wave mixed state $B_s(1D_2^{\prime })$ with $J^P=2^{-}$, although it as the $1^3{D}_3$ state cannot be excluded. (iv) The relatively broader $B_{sJ}(6114)$ structure observed at LHCb may be explained with the mixed state $B_s(|SD{⟩}_H)$ via $2^3{S}_1$-$1^3{D}_1$ mixing, or a pure $1^3{D}_1$ state. Most of the missing $1P$-, $1D$-, and $2S$-wave $B$- and $B_s$-meson states have a relatively narrow width, they are most likely to be observed in their dominant decay channels with a larger data sample at LHCb.

17 pages, 4 figures, to be published in PRD

References in corpus (24)

• Strong and radiative decays of the low-lying $S$- and $P$-wave singly heavy baryons
• Charmed baryon strong decays in a chiral quark model
• Charmonium spectrum and their electromagnetic transitions with higher multipole contributions
• Strong decays of heavy-light mesons in a chiral quark model
• $B$ and $B_s$ Meson Spectroscopy
• Mass spectra and radiative transitions of doubly heavy baryons in a relativized quark model
• Excited bottom and bottom-strange mesons in the quark model
• Canonical Interpretation of the D_{sJ}(2860) and D_{sJ}(2690)
• Strong and radiative decays of the doubly charmed baryons
• Structure of charmed baryons studied by pionic decays
• Precise B, B_s and B_c meson spectroscopy from full lattice QCD
• B_{s1}(5830) and B_{s2}^*(5840)
• The excited bottom-charmed mesons in a nonrelativistic quark model
• Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$
• Observation and Properties of L=1 B_1 and B_2* Mesons
• Strong decays of higher excited heavy-light mesons in a chiral quark model
• Possible 2S and 1D charmed and charmed-strange mesons
• $\Omega$ baryon spectrum and their decays in a constituent quark model
• Excited state mass spectra, Decay properties and Regge trajectories of charm and charm-strange mesons
• Spectroscopy, Decay properties and Regge trajectories of the $B$ and $B_s$ mesons
• Strong decay of the heavy tensor mesons with QCD sum rules
• The history of LHCb
• Spectroscopic Assignments of the Excited $B$-Mesons
• Dynamical mixing between $2^3{S}_1$ and $1^3{D}_1$ charmed mesons

Cited by in corpus (13)

• An updated review of the new hadron states
• Mass spectra and strong decays of charmed and charmed-strange mesons
• $b$-hadron spectroscopy study based on the similarity of double bottom baryon and bottom meson
• The investigations of the $P$-wave $B_s$ states combining quark model and lattice QCD in the coupled channel framework
• The assignments of the $B_s$ mesons within the screened potential model and ${}^3{P}_0$ model
• Masses and radiative decay widths of the $D_{s0}^{\ast }(2317)$ and $D_{s1}^{\prime }(2460)$ and their bottom analogs
• The assignments of the bottom mesons within the screened potential model and ${}^3{P}_0$ model
• Construction of Isoscalar $2^{-+}$ Mesonic States Inspired by the $X(2600)$ Discovery
• $B_c$ to $A$ Transition Form Factors and Semileptonic Decays in Self-consistent Covariant Light-front Approach
• The partial waves of $B_2^{\ast }(5747)$ and their contributions in strong decays
• Phenomenology of $D_{s1}$ mesons radiative transitions
• Placing of the recently observed bottom strange state $B_{sJ}(6063)$ and $B_{sJ}(6114)$ in bottom spectra
• Likelihood analysis of the newly observed $f_0(2020)$, $f_0(2330)$, and $f_0(2470)$ in $J/\psi \to \gamma {\eta }^{\prime }{\eta }^{\prime }$ as high-lying unflavored scalar mesons