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 0810.0566hep-ex
收藏

无粲三体$B$在BABAR的衰变

Charmless Three-body $B$ Decays at BABAR

Feng Liu

摘要:

我们提出了达利兹图分析$B^+\to K^+π^-π^+$和$B^0\to K^+π^-π^0$使用的数据样本收集在$Υ(4S)$的BABAR检测器。我们已经发现了在$B^\pm\toρ^0 K^\pm$衰变中直接CP破坏的证据,其中CP破坏参数为${\cal A}_{CP}={Γ_{B^+}-Γ_{B^-}\over Γ_{B^+}+Γ_{B^-}}= (+44\pm10\pm4^{+5}_{-13})%$,其中$Γ_{B^\pm}$是衰变率。不确定性分别是统计的、系统的和模型依赖的。我们还寻找抑制衰变$B^+\to K^-π^+π^+$和$K^+K^+π^-$,并提高了衰变分支分数的上限。

英文摘要:

We present Dalitz-plot analyses of $B^+\to K^+π^-π^+$ and $B^0\to K^+π^-π^0$ using the data sample collected at the $Υ(4S)$ by the BABAR detector. We have found evidence for direct CP-violation in the decay $B^\pm\toρ^0 K^\pm$, with a CP-violation parameter ${\cal A}_{CP}={Γ_{B^+}-Γ_{B^-}\over Γ_{B^+}+Γ_{B^-}}= (+44\pm10\pm4^{+5}_{-13})%$, where $Γ_{B^\pm}$ are the decay rates. The uncertainties are statistical, systematic, and model-dependent, respectively. We also search for the suppressed decays $B^+\to K^-π^+π^+$ and $K^+K^+π^-$ and improve upper limits on the decay branching fractions.

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。

↑