Results 21 to 30 of about 521,380 (323)
Modular invariance and the QCD angle
Journal of High Energy Physics, 2023 String compactifications on an orbi-folded torus with complex structure give rise to chiral fermions, spontaneously broken CP, modular invariance. We show that this allows simple effective theories of flavour and CP where: i) the QCD angle vanishes; ii ...
Ferruccio Feruglio +2 more
doaj +1 more source
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
doaj +1 more source
Beyond Jarlskog: 699 invariants for CP violation in SMEFT
Journal of High Energy Physics, 2022 As SMEFT is a framework of growing importance to analyze high-energy data, understanding its parameter space is crucial. The latter is commonly split into CP-even and CP-odd parts, but this classification is obscured by the fact that CP violation is ...
Quentin Bonnefoy +3 more
doaj +1 more source
CP violation and modular symmetries [PDF]
, 2001 We reconsider the origin of CP violation in fundamental theory. Existing string models of spontaneous CP violation make ambiguous predictions, due to the arbitrariness of CP transformation and the apparent non-invariance of the results under duality.
A. G. Cohen +42 more
core +2 more sources
CP Invariance Study of $J/\psi \to {\mit \Lambda }\bar {\mit \Lambda }$ and ${\mit \Lambda }$ Nonleptonic Decays in Helicity Frame [PDF]
, 2015 We present the joint helicity amplitudes for $J/\psi \to \Lambda \bar{\Lambda}$, $\Lambda(\bar\Lambda)$ decays to different final states in the helicity frame. Two observables to search for $CP$ violation in $J/\psi\to\Lambda\bar\Lambda$ can be expressed
B. Zhong, G. Liao
semanticscholar +1 more source
Higgs Bosons in the Two-Doublet Model with CP Violation [PDF]
, 2004 We consider the effective two-Higgs-doublet potential with complex parameters, when the CP invariance is broken both explicitly and spontaneously. Diagonal mass term in the local minimum of the potential is constructed for the physical basis of Higgs ...
Akhmetzyanova, E. +2 more
core +1 more source
Flavor and CP invariant composite Higgs models [PDF]
Journal of High Energy Physics, 2011 36 pages; v2 appendix and references added; v3 version to be published in JHEP; v4 discussion on dipoles ...
Redi, M., Weiler, A.
openaire +4 more sources
Modular invariant A4 models for quarks and leptons with generalized CP symmetry
Journal of High Energy Physics, 2021 We perform a systematical analysis of the A 4 modular models with generalized CP for the masses and flavor mixing of quarks and leptons, and the most general form of the quark and lepton mass matrices is given.
Chang-Yuan Yao, Jun-Nan Lu, Gui-Jun Ding
doaj +1 more source
Radiative Higgs-Sector CP Violation in the MSSM [PDF]
, 2000 We briefly review the phenomenological implications of the minimal supersymmetric standard model (MSSM) with explicit radiative breaking of CP invariance in the Higgs sector for the LEP2 and Tevatron colliders.Comment: 6 pages, talk given at PASCOS '99 ...
Pilaftsis, Apostolos
core +2 more sources
The tests of CP and CPT symmetry using the J-PET detector [PDF]
EPJ Web of Conferences, 2019 Symmetries under the parity transformation (P), charge-conjugation (C) and time reversal (T) are of fundamental importance in nuclear and elementary particle physics.
Mohammed Muhsin, Gajos Aleksander
doaj +1 more source