Implications on the first observation of charm CPV at LHCb

Abstract

Very recently, the LHCb Collaboration observed the $CP$ violation (CPV) in the charm sector for the first time, with $\Delta A_{CP}^{\mathrm{dir}}\equiv A_{CP}(D^0\to K^{+}{K}^{-})-A_{CP}(D^0\to {\pi }^{+}{\pi }^{-})=(-1.54\pm 0.29)\times 10^{-3}$. This result is consistent with our prediction of $\Delta A_{CP}^{\mathrm{SM}}=(-0.57\sim -1.87)\times 10^{-3}$ obtained in the factorization-assisted topological-amplitude (FAT) approach in [PRD86,036012(2012)]. It implies that the current understanding of the penguin dynamics in charm decays in the Standard Model is reasonable. Motivated by the success of the FAT approach, we further suggest to measure the $D^{+}\to K^{+}{K}^{-}{\pi }^{+}$ decay, which is the next potential mode to reveal the CPV of the same order as $10^{-3}$.

10 pages

Cited by in corpus (10)

• Revisiting CP violation in $D\to PP$ and $VP$ decays
• Direct CP violation in beauty and charm hadron decays
• Search for time-dependent $CP$ violation in $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$ decays
• Renormalisation scale setting for D-mixing
• Updated measurement of decay-time-dependent CP asymmetries in $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$ decays
• Resonance enhancement of Charm CP
• Measurements of Absolute Branching Fractions of $D^0\to K_L^0\varphi$, $K_L^0\eta$, $K_L^0\omega$, and $K_L^0{\eta }^{\prime }$
• Search for $\text{CP}$ violation in the phase space of $D^0\to K_S^0{K}^{\pm }{\pi }^{\mp }$ decays with the energy test
• A Review of $CP$ Violation Measurements in Charm at LHCb
• CP violation in quasi-two-body $D\to VP$ decays and three-body $D$ decays mediated by vector resonances