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EPJ Web of Conferences, 2022 The existence of CP violation in the decays of strange and beauty mesons is very well established experimentally. On the contrary, CP violation in the decays of charmed particles has been elusive for a long time and has been observed for the first time ...
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Journal of High Energy Physics, 2021 Solutions of the Strong CP Problem based on the spontaneous breaking of CP must feature a non-generic structure and simultaneously explain a coincidence between a priori unrelated CP-even and CP-odd mass scales.
Alessandro Valenti, Luca Vecchi
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Journal of High Energy Physics, 2023 In the electroweak sector of the Standard Model, CP violation arises through a very particular interplay between the three quark generations, as described by the Cabibbo-Kobayashi-Maskawa (CKM) mechanism and the single Jarlskog invariant J 4.
Quentin Bonnefoy +3 more
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Coloured gravitational instantons, the strong CP problem and the companion axion solution
European Physical Journal C: Particles and Fields, 2022 Quantum gravity introduces a new source of the combined parity (CP) violation in gauge theories. We argue that this new CP violation gets bundled with the strong CP violation through the coloured gravitational instantons. Consequently, the standard axion
Zhe Chen, Archil Kobakhidze
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Spontaneous CP violation and symplectic modular symmetry in Calabi-Yau compactifications
Nuclear Physics B, 2021 We explore the geometrical origin of CP and the spontaneous CP violation in Calabi-Yau compactifications. We find that the CP symmetry is identified with an outer automorphism of the symplectic modular group in the large complex structure regime of ...
Keiya Ishiguro +2 more
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Spontaneous CP violation and the strong CP problem
Journal of High Energy Physics, 2017 We derive sufficient conditions that guarantee a robust solution of the strong CP problem in theories with spontaneous CP violation, and introduce a class of models satisfying these requirements. In the simplest scenarios the dominant contribution to the
Luca Vecchi
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CP violation from string theory
Physics Letters B, 2018 We identify a natural way to embed CP symmetry and its violation in string theory. The CP symmetry of the low energy effective theory is broken by the presence of heavy string modes.
Hans Peter Nilles +3 more
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Hunting for Direct CP Violation in B¯s0⟶π+π−K∗0
Advances in High Energy Physics, 2022 In perturbative QCD approach, based on the first order of isospin symmetry breaking, we study the direct CP violation in the decay of B¯s0⟶ρωK∗0⟶π+π−K∗0.
Sheng-Tao Li, Gang Lü
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Sum rules for CP asymmetries of charmed baryon decays in the $$SU(3)_F$$ SU(3)F limit
European Physical Journal C: Particles and Fields, 2019 Motivated by the recent LHCb observation of CP violation in charm, we study CP violation in the charmed baryon decays. A simple method to search for the CP violation relations in the flavor SU(3) limit, which is associated with a complete interchange of ...
Di Wang
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CP violation in three-body B decays: a model ansatz
Journal of High Energy Physics, 2020 The mechanism of CP violation remains one of the puzzles in particle physics. Key to understanding this phenomenon are nonleptonic B decays, especially multibody decays which exhibit large CP asymmetries in various regions of phase space.
Thomas Mannel +2 more
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