Decays of B, $$B_s$$ B s and $$B_c$$ B c to D-wave heavy–light mesons

Qiang Li, Tianhong Wang, Yue Jiang, Han Yuan, Tian Zhou, Guo-Li Wang
2017 European Physical Journal C: Particles and Fields  
We study the weak decays of B̅_(s) and B_c into D-wave heavy-light mesons, including J^P=2^- (D_(s)2,D'_(s)2,B_(s)2, B'_(s)2) and 3^- (D^*_(s)3, B^*_(s)3) states. The weak decay hadronic matrix elements are achieved based on the instantaneous Bethe-Salpeter method. The branching ratios for B̅ decays are B[B̅→ D_2eν̅_e] = 1.1^-0.3_+0.3× 10^-3, B[B̅→ D'_2eν̅_e]=4.1^-0.8_+0.9× 10^-4, and B[B̅→ D^*_3eν̅_e]=1.0^-0.2_+0.2× 10^-3, respectively. For semi-electronic decays of B̅_s to D_s2, D'_s2, and
more » ... _s3, the corresponding branching ratios are 1.7^-0.5_+0.5× 10^-3, 5.2^-1.5_+1.6× 10^-4, and 1.5^-0.4_+0.4× 10^-3, respectively. The branching ratios of semi-electronic decays of B_c to D-wave D mesons are in the order of 10^-5. We also achieved the forward-backward asymmetry, angular spectra, and lepton momentum spectra. In particular the distribution of decay widths for 2^- states D_2 and D'_2 varying along with mixing angle are presented.
doi:10.1140/epjc/s10052-016-4588-5 fatcat:tl3rdlcg75cvloi6twr7s6boka