Direct CP violation in beauty and charm hadron decays

Abstract

Since the discovery of CP violation more than 5 decades ago, this phenomenon is still attracting a lot of interest. Among the many fascinating aspects of this subject, this review is dedicated to direct CP violation in non-leptonic decays. The advances within the last decade have been enormous, driven by the increasingly large samples of b- and c-hadron decays, and have led to very interesting results such as large CP asymmetries in charmless B decays and the observation of direct CP violation in the charm sector. We address the quest for understanding the origin of strong phases, the importance of final state interactions and the relation with CPT symmetry, and different approaches to measure direct CP violation in these decays. The main experimental results and their implications are then discussed.

arXiv comment59 pages, 41 figures

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• LCSR analysis of exclusive two-body B decay into charmonium
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• Can Up FCNC solve the $\Delta A_{CP}$ puzzle?
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• Flavor Physics and CP Violation
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• Non-leptonic beauty baryon decays and $CP$-asymmetries based on $SU(3)$-Flavor analysis
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• Amplitude analysis of the decay ${\overline{B}}^0\to K_S^0{\pi }^{+}{\pi }^{-}$ and first observation of the CP asymmetry in ${\overline{B}}^0\to K^{\ast }(892{)}^{-}{\pi }^{+}$
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• Final state interaction in $D^{+}\to K^{-}{\pi }^{+}{\pi }^{+}$ with $K\pi$ I=1/2 and 3/2 channels
• Search for b --> u Transitions in B^{+-} --> [K^{-+} pi^{+-} pi0]_D K^{+-} Decays
• Suppressed $B\to PV$ CP asymmetry: CPT constraint
• Resonance enhancement of Charm CP
• Final state interaction on $B^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$
• Search for $CP$ violation in the $D^{+}\to {\pi }^{+}{\pi }^0$ decay at Belle
• Charm Penguin in $B^{\pm }\to K^{\pm }{K}^{+}{K}^{-}$: partonic and hadronic loops
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• The Laura++ Dalitz plot fitter
• Search for $CP$ violation in $D_s^{+}\to K_S^0{\pi }^{+}$, $D^{+}\to K_S^0{K}^{+}$ and $D^{+}\to \varphi {\pi }^{+}$ decays
• Search for $CP$ violation in the phase space of $D^0\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ decays
• Direct CP Violation in Charm Decays due to Left-Right Mixing
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• A new method to measure the CP violating angle gamma using B^\pm -> pi^\pm pi^+ pi^- and B^\pm -> K^\pm pi^+ pi^- decays
• "Could Charm (\& $\tau$) Transitions be the `Poor Princesses' of Deeper Understanding of Fundamental Dynamics?" -- or -- "Finding Novel Forces?"
• Measurement of $CP$ observables in $B^{\pm }\to D{K}^{\pm }$ and $B^{\pm }\to D{\pi }^{\pm }$ with $D\to K_{\mathrm{S}}^0{K}^{\pm }{\pi }^{\mp }$ decays
• Measurement of $CP$ asymmetries in $D^{\pm }\to {\eta }^{\prime }{\pi }^{\pm }$ and $D_s^{\pm }\to {\eta }^{\prime }{\pi }^{\pm }$ decays
• The BABAR Detector: Upgrades, Operation and Performance
• CP violation in multibody decays of beauty baryons
• Evidence for Direct CP Violation in $B^{\pm }\to \eta h^{\pm }$ and Observation of $B^0\to \eta K^0$
• Searching for dominant rescattering sources in B to two pseudoscalar decays
• First measurement of the CKM angle ${\varphi }_3$ with $B^{\pm }\to D(K_{\mathrm{S}}^0{\pi }^{+}{\pi }^{-}{\pi }^0)K^{\pm }$ decays
• First model-independent Dalitz analysis of $B^0\to D{K}^{\ast 0}$, $D\to K_S^0{\pi }^{+}{\pi }^{-}$ decay
• CP asymmetry from hadronic charm rescattering in $B^{\pm }\to {\pi }^{-}{\pi }^{+}{\pi }^{\pm }$ decays at the high mass region
• Probing CP Asymmetries in Charm Baryons Decays
• CP Asymmetries in Three-Body Final States in Charged $D$ Decays & CPT Invariance
• First measurement of $\mathbf{T}$-odd moments in ${\mathbf{D}}^0\to {\mathbf{K}}_{\mathbf{S}}^0{\mathbf{\pi }}^{+}{\mathbf{\pi }}^{-}{\mathbf{\pi }}^0$ decays
• CP violation in $D^0\to K^{+}{\pi }^{-}$
• CP Violation in $B^{\pm }\to {\rho }^0{\pi }^{\pm }$ and $B^{\pm }\to \sigma {\pi }^{\pm }$ Decays
• A Challenge to Lepton Universality in B Meson Decays
• Unitarity and Interfering Resonances in pipi Scattering and in Pion Production piN->pipiN
• Search for $CP$ violation with kinematic asymmetries in the $D^0\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ decay
• FSI phases and CP asymmetries in beauty: QCD point of view
• Charm rescattering contribution in rare $B_c^{+}\to K^{+}{K}^{-}{\pi }^{+}$ decay
• Looking for meson molecules in B decays
• 2019/20 Lessons from $\tau ({\Omega }_c^0)$ \& $\tau ({\Xi }_c^0)$ and {\bf CP} asymmetry in charm decays

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• Dispersive $\pi K\to \pi K$ and $\pi \pi \to K\bar{K}$ amplitudes from scattering data, threshold parameters and the lightest strange resonance $\kappa$ or $K_0^{\ast }(700)$
• Enhancement of charm CP violation due to nearby resonances
• Direct $CP$ violation in charmless three-body decays of $B^{\pm }$ mesons
• Enhanced charm CP asymmetries from final state interactions
• PNJL model at zero temperature: three-flavor case
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• CP violation in the interference between $\rho (770{)}^0$ and $S$-wave in $B^{\pm }\to {\pi }^{+}{\pi }^{-}{\pi }^{\pm }$ decays and its implication for CP asymmetry in $B^{\pm }\to {\rho }^0{\pi }^{\pm }$
• Global CP asymmetries in charmless three-body $B$ decays with final state interactions
• Study of the $B^{-}\to K^{-}\eta {\eta }_c$ decay due to the $D\bar{D}$ bound state
• CP Violation In Baryon Decays At LHCb
• Measurement of $D^0-{\overline{D}}^0$ mixing and search for $CP$ violation with $D^0\to K^{+}{\pi }^{-}$ decays
• Search for $CP$ violation in $D_{(s)}^{+}\to K^{-}{K}^{+}{K}^{+}$ decays
• Amplitude analysis of the $D^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decay and measurement of the ${\pi }^{-}{\pi }^{+}$ S-wave amplitude
• Phenomenological description of the ${\pi }^{-}{\pi }^{+}$ $S$-waves in $D^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ and $D_s^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decays: The problem of phases
• Study of CP Violation in $D^{\pm }\to K^{\ast }(892{)}^0{\pi }^{\pm }+{\bar{K}}^{\ast }(892{)}^0{\pi }^{\pm }\to K_{S,L}^0{\pi }^0{\pi }^{\pm }$ Decays
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• Understanding large localized CP violation in $B^{\pm }\to K^{\pm }{\pi }^{+}{\pi }^{-}$ using dispersive methods
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