论文标题
在稀有魅力衰减中利用CP-Asmorgemerties
Exploiting CP-asymmetries in rare charm decays
论文作者
论文摘要
我们分析了在HADRONIC和EMILEPTONIC稀有魅力$ \vertΔC\ vert = \vertΔU\ vert = 1 $ transitions中分析CP侵略新物理学（NP）的模式。观察Hadronic衰变中直接的CP-violation，例如$ΔA_ {\ text {cp}} $，为$ c \ to u \，\ ell^+ el^+ el^+ el^ - $，$ \ ell = e，μ$ $ $ transitions提供了机会。对于$Δa_ {\ text {cp}} $的NP解释，对于$Δa_ {\ text {cp}} $的np解释建议，在半泥腐蚀中可测量的cp-asymerties，例如$ d \ to $ d \ fo至fo至fo， \ ell^ - $。相反，对$ c \中的cp-violation的观察到u \，e^+ e^ - $或$ c \ to u \ to u \，μ^+μ^ - $衰减支持$ΔA_ {\ text {cp}}} $的np--解释。美味的$ u（1）^\ prime $延伸提供明确的u-旋转和同义破裂，可以用harronic衰变的魅力介子的模式进行探测。 We work out signatures for CP-asymmetries in $D^0 \to π^+ π^-$, $D^0 \to K^+ K^-$ and $D^0 \to π^0 π^0$, $D^+ \to π^+ π^0$ decays, which can be probed in the future at LHCb and Belle II and provide further informative cross checks.
We analyze patterns from CP-violating new physics (NP) in hadronic and semileptonic rare charm $\vert Δc \vert=\vert Δu\vert=1$ transitions. Observation of direct CP-violation in hadronic decays, as in $ΔA_{\text{CP}}$, provides opportunities for $c \to u \,\ell^+ \ell^-$, $\ell=e,μ$ transitions, and vice versa. For the concrete case of flavorful, anomaly-free $Z^\prime$-models a NP-interpretation of $ΔA_{\text{CP}}$ suggests measurable CP-asymmetries in semileptonic decays such as $D \to π\, \ell^+ \ell^-$ or $D \to ππ\, \ell^+ \ell^-$. Conversely, an observation of CP-violation in $c \to u\, e^+ e^-$ or $c \to u\, μ^+ μ^-$ decays supports a NP--interpretation of $ΔA_{\text{CP}}$. Flavorful $U(1)^\prime$-extensions provide explicit U--spin and isospin breaking which can be probed in patterns of hadronic decays of charm mesons. We work out signatures for CP-asymmetries in $D^0 \to π^+ π^-$, $D^0 \to K^+ K^-$ and $D^0 \to π^0 π^0$, $D^+ \to π^+ π^0$ decays, which can be probed in the future at LHCb and Belle II and provide further informative cross checks.
