论文标题
$ \ bar {b} \ rightarrow d^0（\ rightarrow k_s^0π^+π^ - ）μ^ - \barν_μx$衰减中的符合符号混合参数的模型无关测量。
Model-independent measurement of charm mixing parameters in $\bar{B} \rightarrow D^0 ( \rightarrow K_S^0 π^+ π^-) μ^- \barν_μX$ decays
论文作者
论文摘要
A measurement of charm mixing and $CP$-violating parameters is reported, using $\bar{B} \rightarrow D^0 ( \rightarrow K_S^0 π^+ π^-) μ^- \barν_μX$ decays reconstructed in proton-proton collisions collected by the LHCb experiment during the years 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb $^{ - 1} $。测得的混合和$ cp $ - 略大的参数为$$ x _ {\ rm cp} = [\，\，\，\，\，\，\，4.29 \ pm 1.48 \ pm 1.48 \ mbox {（stat）}}} \ pm pm pm pm pm pm pm box {（syst）} cp} = [\，\，12.61 \ pm 3.12 \ mbox {（stat）} \ pm 0.83 \ mbox {（syst）}] \ times 10^{ - 3} { - 3} \ ,, $ $ $ $ $ $ $ $uxΔx \ mbox {（syst）}] \ times 10^{ - 3} \ ,, $$ $$ $$ $Δy\，= [\，\，\，\，\，\，3.01 \ pm 1.92 \ pm 1.92 \ mbox {（stat）并与以前的测量相一致。报告了与$ d^{*+} \ rightArrow d^0的最新LHCB分析（\ rightArrow k_s^0π^+π^ - ）π^+ $衰减的结合。
A measurement of charm mixing and $CP$-violating parameters is reported, using $\bar{B} \rightarrow D^0 ( \rightarrow K_S^0 π^+ π^-) μ^- \barν_μX$ decays reconstructed in proton-proton collisions collected by the LHCb experiment during the years 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. The measured mixing and $CP$-violating parameters are $$x_{\rm CP} = [ \,\,\,\,\,4.29 \pm 1.48 \mbox{(stat)} \pm 0.26 \mbox{(syst)} ] \times 10^{-3}\,,$$ $$y_{\rm CP} = [ \,\,12.61 \pm 3.12 \mbox{(stat)} \pm 0.83 \mbox{(syst)} ] \times 10^{-3} \,,$$ $$Δx \,\,= [ -0.77 \pm 0.93 \mbox{(stat)} \pm 0.28 \mbox{(syst)} ] \times 10^{-3} \,,$$ $$Δy \, = [ \,\,\,\,\,3.01 \pm 1.92 \mbox{(stat)} \pm 0.26 \mbox{(syst)} ] \times 10^{-3} \,.$$ The results are complementary to and consistent with previous measurements. A combination with the recent LHCb analysis of $D^{*+} \rightarrow D^0 ( \rightarrow K_S^0 π^+ π^-) π^+ $ decays is reported.
