scholarly journals Recent Results and Progress on Leptonic and Storage Ring EDM Searches

2016 ◽  
Vol 40 ◽  
pp. 1660075
Author(s):  
David Kawall
Keyword(s):  
Standard Model ◽  
Storage Ring ◽  
Electric Dipole ◽  
Dipole Moments ◽  
New Physics ◽  
Electric Dipole Moments ◽  
Fundamental Particles ◽  
The Standard Model ◽  
And Storage ◽  
The Universe

The Standard Model is incomplete and unable to explain the matter-antimatter asymmetry in the universe. Many extensions of the Standard Model predict new particles and interactions with additional [Formula: see text]-violating phases that can explain this imbalance. Electric dipole moments (EDMs) of fundamental particles, which are generated by [Formula: see text]-violating interactions, can be enhanced by many orders of magnitude by contributions from this new physics to a magnitude within reach of current and planned experiments. New approaches to EDM searches using storage rings, and their sensitivity to new physics are presented.

scholarly journals CP VIOLATION IN SUPERSYMMETRIC THEORIES

2003 ◽  
Vol 18 (10) ◽  
pp. 1697-1732 ◽  
Author(s):  
SHAABAN KHALIL
Keyword(s):  
Dipole Moment ◽  
Cp Violation ◽  
Standard Model ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Neutron Electric Dipole Moment ◽  
Cp Asymmetry ◽  
Electric Dipole Moments ◽  
The Standard Model ◽  
Supersymmetric Theories

We review the present status of the CP violating problem in supersymmetric extensions of the standard model. We analyze the constraints imposed by the experimental limits of the electron, neutron, and mercury electric dipole moments on the supersymmetric CP phases and show that only the scenarios with flavour-off-diagonal CP violation remain attractive. These scenarios require Hermitian Yukawa matrices which naturally arise in models with left–right symmetry or a SU(3) flavour symmetry. In this case, εK and ε′/ε can be saturated by a small non-universality of the soft scalar masses through the gluino and chargino contributions respectively. The model also predicts a strong correlation between A CP (b → sγ) and the neutron electric dipole moment. In this framework, the standard model gives a the leading contribution to the CP asymmetry in B → ψKS decay, while the dominant chargino contribution to this asymmetry is < 0.2. Thus, no constraint is set on the non-universality of this model by the recent BaBar and Belle measurements.

A REVIEW OF CP VIOLATION IN ATOMS

1993 ◽  
Vol 08 (02) ◽  
pp. 209-236 ◽  
Author(s):  
S.M. BARR
Keyword(s):  
Cp Violation ◽  
Standard Model ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Beyond The Standard Model ◽  
Electric Dipole Moments ◽  
The Standard Model ◽  
The Subject

The subject of atomic and molecular electric dipole moments is reviewed from the perspective of currently interesting theories of CP violation beyond the standard model.

scholarly journals Permanent electric dipole moments of single-, two- and three-nucleon systems

2017 ◽  
Vol 26 (01n02) ◽  
pp. 1740031 ◽  
Author(s):  
Andreas Wirzba ◽  
Jan Bsaisou ◽  
Andreas Nogga
Keyword(s):  
Electric Fields ◽  
Electric Dipole ◽  
Dipole Moments ◽  
New Physics ◽  
Finite System ◽  
Light Nuclei ◽  
Window Of Opportunity ◽  
Matrix Elements ◽  
Electric Dipole Moments ◽  
The Standard Model

A nonzero electric dipole moment (EDM) of the neutron, proton, deuteron or helion, in fact, of any finite system necessarily involves the breaking of a symmetry, either by the presence of external fields (i.e., electric fields leading to the case of induced EDMs) or explicitly by the breaking of the discrete parity and time-reflection symmetries in the case of permanent EDMs. We discuss two theorems describing these phenomena and report about the cosmological motivation for an existence of [Formula: see text] breaking beyond what is generated by the Kobayashi–Maskawa mechanism in the Standard Model and what this might imply for the permanent EDMs of the nucleon and light nuclei by estimating a window of opportunity for physics beyond what is currently known. Recent — and in the case of the deuteron even unpublished — results for the relevant matrix elements of nuclear EDM operators are presented and the relevance for disentangling underlying New Physics sources is discussed.

scholarly journals Constraints on CP-Odd ALP Couplings from EDM Limits of Fermions

Particles ◽  
2020 ◽  
Vol 3 (4) ◽  
pp. 719-728
Author(s):  
Dmitri V. Kirpichnikov ◽  
Valery E. Lyubovitskij ◽  
Alexey S. Zhevlakov
Keyword(s):  
Standard Model ◽  
Storage Ring ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Coupling Constants ◽  
Electric Dipole Moments ◽  
Storage Ring Experiment ◽  
Electron Edm ◽  
Using Data ◽  
Photon Coupling

We discuss constraints on soft CP-violating couplings of axion-like particles with photon and fermions by using data on electric dipole moments of standard model particles. In particular, for the axion-like particle (ALP) leptophilic scenario, we derive bounds on CP-odd ALP-photon-photon coupling from data of the ACME collaboration on electron EDM. We also discuss prospects of the storage ring experiment to constrain the ALP–photon–photon coupling from data on proton EDM for the simplified hadrophilic interactions of ALP. The resulting constraints from experimental bounds on the muon and neutron EDMs are weak. We set constraint on the CP-odd ALP coupling with electron and derive bounds on combinations of coupling constants, which involve soft CP-violating terms.

scholarly journals Searches for Electric Dipole Moments—Overview of Status and New Experimental Efforts

Universe ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 56
Author(s):  
Florian Kuchler on behalf of the TUCAN and HeXeEDM Collaborations
Keyword(s):  
Electric Dipole ◽  
Dipole Moments ◽  
Global Analysis ◽  
Model Parameters ◽  
Electric Dipole Moments ◽  
Spallation Target ◽  
Fundamental Particles ◽  
T Violation ◽  
Theoretical Predictions ◽  
The Universe

Searches for permanent electric dipole moments (EDMs) of fundamental particles, atoms and molecules are promising experiments to constrain and potentially reveal beyond Standard Model (SM) physics. A non-zero EDM is a direct manifestation of time-reversal (T) violation, and, equivalently, violation of the combined operation of charge-conjugation (C) and parity inversion (P). Identifying new sources of CP violation can help to solve fundamental puzzles of the SM, e.g., the observed baryon-asymmetry in the Universe. Theoretical predictions for magnitudes of EDMs in the SM are many orders of magnitude below current experimental limits. However, many theories beyond the SM require larger EDMs. Experimental results, especially when combined in a global analysis, impose strong constraints on CP violating model parameters. Including an overview of EDM searches, I will focus on the future neutron EDM experiment at TRIUMF (Vancouver). For this effort, the TUCAN (TRIUMF Ultra Cold Advanced Neutron source) collaboration is aiming to build a strong, world leading source of ultra cold neutrons (UCN) based on a unique combination of a spallation target and a superfluid helium UCN converter. Another focus will be the search for an EDM of the diamagnetic atom 129 Xe using a 3 He comagnetometer and SQUID detection. The HeXeEDM collaboration has taken EDM data in 2017 and 2018 in the magnetically shielded room (BMSR-2) at PTB Berlin.

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