Placing the newly observed state BJ(5840) in bottom spectra along with states B1(5721), B2*(5747), Bs1(5830), B2s*(5840), and BJ(5970)

摘要

We apply the formalism of P. Colangelo et?al. [Phys. Rev. D 86 , 054024 (2012)] to discuss the quantum number assignments for the recently observed B J ( 5840 ) state by R. Aaij et?al. (LHCb Collaboration) [J. High Energy Phys. 04 (2015 ) 024], and we classify the six possible J P ’s for this state on the basis of the theoretically available masses. By analyzing the strong decay widths and the branching ratios for all six of these cases of B J ( 5840 ) , we justify one of them to be the most favorable assignment. We also examine the recently observed bottom state B J ( 5970 ) as 2 S 1 ? and states B J ( 5721 ) and B 2 * ( 5747 ) with their strange partners B s 1 ( 5830 ) and B 2 s * ( 5840 ) for their J P ’s as 1 P 3 / 2 1 + and 1 P 3 / 2 2 + , respectively. The predicted coupling constants g X H , g ? H H , and g T H help in redeeming the strong decay width of experimentally missing bottom states B ( 2 S 1 0 ) , B s ( 2 S 3 1 ) , B s ( 2 S 1 0 ) , B ( 1 D 1 2 ) , B s ( 1 D 3 1 ) , and B s ( 1 D 1 2 ) . These predictions provide crucial information for upcoming experimental studies.