Excited bottom and bottom-strange mesons in the quark model

Abstract

In order to understand the possible qq quark-model assignments of the BJ (5840) and BJ (5960) recently reported by the LHCb Collaboration, we evaluate mass spectra, strong decays, and radiative decays of bottom and bottom-strange mesons in a nonrelativistic quark model. Comparing these predictions with the relevant experimental results, we suggest that the BJ (5840) and BJ (5960) can be identified as B(2 1 S0) and B(1 3 D3), respectively, and the B(5970) reported by the CDF Collaboration can be interpreted as B(2 3 S1) or B(1 3 D3). Further precise measurements of the width, spin and decay modes of the B(5970) are needed to distinguish these two assignments. These predictions of bottom and bottom-strange mesons can provide useful information to further experimental investigations.

BandBsmeson spectroscopy

“…[11] was submitted to the arXiv [30]. The authors computed B and B s spectra and strong decays with the 3 P 0 model using full mesonic wavefunctions.…”

Strong decays of $$D_{3}^{*}(2760)$$ D 3 ∗ ( 2760 ) , $$D_{s3}^{*}(2860)$$ D s 3 ∗ ( 2860 ) , $$B_{3}^{*}$$ B 3 ∗ , and $$B_{s3}^{*}$$ B s 3 ∗

“…[25] and [32] but smaller than that in Ref. [39], where 3 P 0 model is applied. Reference [27] uses the chiral quark model.…”

“…Beside that, those decays are also applied to determine the quantum number of particles. To study these decays, several theoretical methods could be applied, such as the chiral quark method [9,[27][28][29][30], the heavy meson effective theory [5,14,26,31], the QCD sum rules [15,16], and the 3 P 0 method [10,12,18,25,[32][33][34][35][36][37][38][39][40]. The chiral quark model introduces an effective Lagrangian to describe the coupling between light quark fields and light meson, while for the heavy meson effective theory, the interaction lagrangian is constructed just by meson fields.…”

The possible members of the $$5^1S_0$$ 5 1 S 0 meson nonet

“…The 3 P 0 model has been widely used to study the strong decays of hadrons in literature [4][5][6][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38]. In the 3 P 0 model, the meson strong decay takes place by producing a quark-antiquark pair with vacuum quantum number J PC = 0 ++ .…”