BandBsmeson spectroscopy

Abstract

Properties of bottom and bottom-strange mesons are computed in two relativized quark models. Model masses and wavefunctions are used to predict radiative transition rates and the 3 P0 quark pair creation model is used to compute strong decay widths. A comparison to recently observed bottom and bottom-strange states is made. We find that there are numerous excited B and Bs mesons that have relatively narrow widths and significant branching ratios to simple final states such as Bπ, B * π, BK, and B * K that could be observed in the near future.

Overview of LHCb results on beauty and charm spectroscopy

“…and is in agreement with expectations from quark model calculations which predict a value of 0.058 for this ratio [10].…”

Strong Decays of Charm Mesons D * 1 (2680), D * 3 (2760), D * 2 (3000)

“…The mass and width of the D * 1 (2680) state are close to those of the D * (2600) observed by the BaBar collaboration [3] and the D * J (2650) observed by the LHCb collaboration [4]. The D * 1 (2680), D * (2600) and D * J (2650) may be the same particle, and can assigned to be the 2S 1 − state [5,6,7,8,9], see Table 1.…”

“…The D * 3 (2760) 0 , D * (2760) 0 , D * J (2760) 0 may be the same particle, and can be assigned to be the 1D 3 − state [5,6,7,8,9,11]. It is reasonable to assign the D * 3 (2760) to be the non-strange partner of the D * s3 (2860) according to the mass gap [5,6,7,8,9,11,12], see Table 1.…”

Strong decays of excited 1D charmed(-strange) mesons in the covariant oscillator quark model

“…The latest results [4,5,10,11] from the LHCb collaboration have revealed two different states with J P = 1 − and 3 − in the same mass region ∼ 2800 MeV for D J and ∼ 2860 MeV for D sJ states. Theoretically, to classify these states on the basis of quark model, their decay properties have been extensively studied [12,13,14,15,16,17,18,19,20] and remains a hotly debated issue. In the quark model classification, a J P = 3 − state in this mass region has no other choice than to be assigned to a 1 3 D 3 state, and a J P = 1 − state that has mass very close to the J P = 3 − states, is likely to be assigned to the same multiplet 1 3 D 1 .…”