2016/07/31 by Qiang Li, Tianhong Wang, Yue Jiang +3
Physics and Astronomy · #B meson #Branching (polymer chemistry) #Branching fraction #Hadron #Lepton #Meson #Nuclear physics research studies #Particle decay #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-016-4588-5
published as Eur. Phys. J. C (2017) 77:12 · 20 pages, 20 figures, 7 tables
openalex created_date 2016/08/23 · arxiv created 2016/12/16 · openalex publication_date 2017/01/01 · arxiv updated 2021/11/05 · openalex updated_date 2026/08/05
We study the weak decays of B(s) and Bc into D-wave heavy–light mesons, including JP=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 obtained based on the instantaneous Bethe–Salpeter method. The branching ratios for the B decays are \mathcal B[B→ D2eν e] = 1.1-0.3+0.3 × 10-3 , \mathcal B[B→ D'2eν e]=4.1-0.8+0.9 × 10-4 , and \mathcal B[B→ D^*3eν e]=1.0-0.2+0.2 × 10-3 , respectively. For the semi-electronic decays of Bs to Ds2 , D's2 , and D^*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 the semi-electronic decays of Bc to D-wave D mesons are in the order of 10-5 . We also obtained the forward–backward asymmetry, angular spectra, and lepton momentum spectra. In particular the distribution of decay widths for the 2- states D2 and D'2 varying along with mixing angle are presented.