arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0712.1882hep-ph
收藏

B_{u,d,s}(bar)到D P,D(bar)P衰变的再散射效应

Rescattering effects in B_{u,d,s}(bar) to D P, D(bar) P decays

Chun-Khiang Chua, Wei-Shu Hou

摘要:

研究了B_{u,d,s}(bar)到DP,D(bar)P衰变中的准弹性再散射效应,其中P是轻赝标.更新后的B_{u,d}(bar)到DP衰变的测量值被用来提取有效Wilson系数a^{eff}_1 ~ 0.90,a^{eff}_2 ~ 0.23,三个强相位δ ~ 53度,θ ~ 18度,σ ~ -88度,以及混合角τ ~ 9度。该信息用于预测19种B_{s}(bar)到DP和B_{u,d,s}(bar)到D(bar)P衰变模式的速率,包括γ/phi_3程序中感兴趣的模式。许多衰变率被发现是增强。特别地,预测B_s(bar)到D 0 K 0的速率为8 \times 10^{-4},这可以很快测量。研究了再散射对相应的B_{u,d,s}(bar)与D(bar)P、DP振幅比r_B、r_{B_s}和相对强相位delta_B、delta_{B_s}的影响。尽管在大多数情况下衰减速率增强,但r_{B,B_s}值与因子分解期望值相似。

英文摘要:

We study quasi-elastic rescattering effects in B_{u,d,s}(bar) to DP, D(bar)P decays, where P is a light pseudoscalar. The updated measurements of B_{u,d}(bar) to DP decays are used to extract the effective Wilson coefficients a^{eff}_1 ~ 0.90, a^{eff}_2 ~ 0.23, three strong phases delta ~ 53 degree, theta ~ 18 degree, sigma ~ -88 degree, and the mixing angle tau ~ 9 degree. This information is used to predict rates of nineteen B_{s}(bar) to DP and B_{u,d,s}(bar) to D(bar)P decay modes, including modes of interests in the gamma/phi_3 program. Many decay rates are found to be enhanced. In particular, the B_s(bar) to D0 K0 rate is predicted to be 8\times 10^{-4}, which could be measured soon. The rescattering effects on the corresponding B_{u,d,s}(bar) to D(bar)P, DP amplitude ratios r_B, r_{B_s}, and the relative strong phases delta_B, delta_{B_s} are studied. Although the decay rates are enhanced in most cases, r_{B,B_s} values are similar to factorization expectation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑