Double Charm Decays of B Mesons in mSUGRA Model

作者：Lue Lin-Xia; Xiao Zhen-Jun; Wang Shuai-Wei; Li Wen-Jun

来源：Communications in Theoretical Physics, 2011, 56(1): 125-133.

• charm decay
• minimal supergravity model
• branching ratio
• CF asymmetry

Based on the low energy effective Hamiltonian with naive factorization, we calculate the branching ratios (BRs) and CP asymmetries (CPAs) for the twenty three double charm decays B/B-s -> D-(*D-)((s))(*())((s)) in both the standard model (SM) and the minimal supergravity (mSUGRA) model. Within the considered parameter space, we End that (a) the theoretical predictions for the BRs, CPAs and the polarization fractions in the SM and the mSUGRA model are all consistent with the currently available data within +/- 2 sigma. errors; (b) For all the considered decays, the supersymmetric contributions in the mSUGRA model are very small, less than 7% numerically. It may be difficult to observe so small SUSY contributions even at LHC.

• 出版日期2011-7-15
• 单位南京师范大学; 河南师范大学; 南阳师范学院