Recent advances in charm mixing and $CP$ violation at LHCb

Abstract

After playing a pivotal role in the birth of the Standard Model in the 70's, the study of charm physics has undergone a revival during the last decade, triggered by a wealth of precision measurements from the charm and $B$ factories, and from the CDF and especially the LHCb experiments. In this article, we sum up how the unique phenomenology of charmed hadrons can be used to test the Standard Model and we review the latest measurements performed in this field by the LHCb experiment. These include the historic first observations of $CP$ violation and of a nonzero mass difference between the charmed neutral-meson mass eigenstates, the most precise determination of their decay-width difference to date, and a search for time-dependent $CP$ violation reaching the unprecedented precision of $10^{-4}$. These results challenge our comprehension of nonperturbative strong interactions, and their interpretation calls for further studies on both the theoretical and experimental sides. The upcoming upgrades of the LHCb experiment will play a leading role in this quest.

39 pages, 13 figures. V2: fixed error in eq. 2.2; updated and improved list of references; added table of contents

References in corpus (24)

• Observation of $CP$ violation in charm decays
• New Physics and CP Violation in Singly Cabibbo Suppressed D Decays
• Implications of D^0-\bar D^0 Mixing for New Physics
• Branching ratios and direct CP asymmetries in $D\to PP$ decays
• Revisiting CP violation in $D\to PP$ and $VP$ decays
• Testing New Indirect CP Violation
• Topological amplitudes in $D$ decays to two pseudoscalars: a global analysis with linear $SU(3{)}_F$ breaking
• Direct CP asymmetry in $D\to {\pi }^{-}{\pi }^{+}$ and $D\to K^{-}{K}^{+}$ in QCD-based approach
• On Indirect CP Violation and Implications for D0-\overline{D0} and Bs -\overline{Bs} mixing
• Measurement of the mass difference between neutral charm-meson eigenstates
• On $SU(3{)}_F$ Breaking through Final State Interactions and CP Asymmetries in $D\to PP$ Decays
• Conclusions from CDF Results on CP Violation in D^0 \to π^+π^-, K^+K^- and Future Tasks
• Mixing and $CP$ violation in the charm system
• Theoretical and experimental status of rare charm decays
• $CP$ asymmetries in charm decays into neutral kaons
• Neutral $D\to K{K}^{\ast }$ decays as discovery channels for charm CP violation
• Measurement of $CP$ observables in $B^{\pm }\to D^{(\ast )}{K}^{\pm }$ and $B^{\pm }\to D^{(\ast )}{\pi }^{\pm }$ decays using two-body $D$ final states
• Measurement of indirect CP-violating asymmetries in $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$ decays at CDF
• Updated measurement of decay-time-dependent CP asymmetries in $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$ decays
• Model independent determination of the CKM phase $\gamma$ using input from $D^0-{\bar{D}}^0$ mixing
• Search for $CP$ violation in $D_s^{+}\to K_S^0{\pi }^{+}$, $D^{+}\to K_S^0{K}^{+}$ and $D^{+}\to \varphi {\pi }^{+}$ decays
• Angular analysis of $D^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ and $D^0\to K^{+}{K}^{-}{\mu }^{+}{\mu }^{-}$ decays and search for $CP$ violation
• "Could Charm (\& $\tau$) Transitions be the `Poor Princesses' of Deeper Understanding of Fundamental Dynamics?" -- or -- "Finding Novel Forces?"
• Flavor $SU(3)$ in Cabibbo-favored $D$-meson decays

Cited by in corpus (2)

• Measurement of $D^0-{\overline{D}}^0$ mixing and search for $CP$ violation with $D^0\to K^{+}{\pi }^{-}$ decays
• Measurement of $CP$ asymmetry in $D^0\to K_{\mathrm{S}}^0{K}_{\mathrm{S}}^0$ decays with Run 3 data