论文标题
搜索Baryon-和Lepton-number违反衰减$ b^0 \ topμ^ - $和$ b^0_s \ topμ^ - $
Search for the baryon- and lepton-number violating decays $B^0\to pμ^-$ and $B^0_s\to pμ^-$
论文作者
论文摘要
在LHCB实验中，使用在$ \ \ sqrt {s} $ = 7、8和13 tev，对应的uminities for Proton-proton碰撞中，在LHCB实验中进行了搜索违反B^0 \ to $ b^0 \ to $ b^0 \ topμ^0 \ topμ^0 \ topμs\ topμ^ - $ fb $^{ - 1} $。 $ b^0 \ topμ^ - $和$ b^0_s \ topμ^ - $衰减没有明显信号，并且分支分数上的上限确定为$ {\ cal b}（\ cal b}（b^0 \ topμ^ - ^ - topμ^ - ）<2.6 \，<2.6 \，（3.1） pμ^ - ）<12.1 \，（14.0）\ times10^{ - 9} $，分别为90 $ \％$（95 $ \％$）置信度。这些是迄今为止这些衰减的第一个限制。
A search for the baryon- and lepton-number violating decays $B^0\to pμ^-$ and $B^0_s\to pμ^-$ is performed at the LHCb experiment using data collected in proton-proton collisions at $\sqrt{s}$ = 7, 8 and 13 TeV, corresponding to integrated luminosities of 1, 2 and 6 fb$^{-1}$, respectively. No significant signal for $B^0\to pμ^-$ and $B^0_s\to pμ^-$ decays is found and the upper limits on the branching fractions are determined to be ${\cal B}(B^0\to pμ^-)<2.6\,(3.1)\times10^{-9}$ and ${\cal B}(B^0_s\to pμ^-)<12.1\,(14.0)\times10^{-9}$, respectively, at 90$\%$ (95$\%$) confidence level. These are the first limits on these decays to date.
