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We briefly review the cases of forced and spontaneous chiral symmetry breaking. In particular the chiral condensate of q anti-q pairs is parametrized with two angles, phi which measures the chiral condensation, and theta which measures the…

高能物理 - 唯象学 · 物理学 2007-05-23 P. Bicudo , J. Ribeiro

It is a well--known problem that in supersymmetric models there are new CP--violating phases which, if unsuppressed, would give a neutron electric dipole moment $10^2$ to $10^3$ times the present experimental limit. Here we propose that…

高能物理 - 唯象学 · 物理学 2010-11-01 K. S. Babu , S. M. Barr

The measurement of the electric dipole moment (EDM) is an excellent test of the standard model of particle physics, and the detection of a finite value is signal of a new source of CP violation beyond it. Among systems for which the EDM can…

核理论 · 物理学 2018-11-06 Nodoka Yamanaka

New sources of CP violation beyond the Standard Model are crucial to explain the baryon asymmetry in the Universe. We discuss the impact of new CP violating interactions in theories where a dark matter candidate is predicted by the…

高能物理 - 唯象学 · 物理学 2021-03-24 Pavel Fileviez Perez , Alexis D. Plascencia

New sources of charge-parity (CP) violation, beyond the known sources in the standard model (SM), are required to explain the baryon asymmetry of the universe. Measurement of a non-zero permanent electric dipole moment (EDM) in fundamental…

核实验 · 物理学 2024-04-10 Prajwal MohanMurthy , Umesh Silwal , Jeff A. Winger

We investigate the phenomenological constraints on a model where, besides the standard model Higgs sector, there is an effective new strong interaction acting on the third generation of quarks and characterized by a $\theta$-like term. This…

高能物理 - 唯象学 · 物理学 2009-11-07 G. C. Branco , D. Delepine , R. Gonzalez Felipe

We demonstrate that in effective theories arising from a class of N=1 fluxless compactifications of M-theory on a G2 manifold with low energy supersymmetry, CP-violating phases do not appear in the soft-breaking Lagrangian except via the…

高能物理 - 唯象学 · 物理学 2011-01-26 Gordon Kane , Piyush Kumar , Jing Shao

Strong correlations between leptogenesis and low energy CP violating leptonic processes have been shown by us to exist in the minimal left-right symmetric model with spontaneous CP violation. In this note, we investigate the implications of…

高能物理 - 唯象学 · 物理学 2008-11-26 Mu-Chun Chen , K. T. Mahanthappa

Axion-mediated forces are enhanced by the presence of CP-violating axion couplings, which are however tightly constrained by electric dipole moment (EDM) searches. We discuss the underlying hypotheses behind different sources of CP…

高能物理 - 唯象学 · 物理学 2025-01-06 Luca Di Luzio , Hector Gisbert , Fabrizio Nesti , Philip Sørensen

In this review, we summarize the theoretical development on the electric dipole moment of light nuclei. We first describe the nucleon level CP violation and its parametrization. We then present the results of calculations of the EDM of…

核理论 · 物理学 2017-05-18 Nodoka Yamanaka

Today's most sensitive experiments for detecting CP-violating permanent electric dipole moments (EDM) rely on molecular spectroscopy. The high sensitivity arises from large internal electric fields that interact with the constituents of the…

原子物理 · 物理学 2025-11-27 Fabian Wolf

We consider the prospects for measuring distinctive signatures of the CP-violating phases in the minimal supersymmetric extension of the Standard Model (MSSM) in light of the limits on sparticle masses from searches at the LHC. We use the…

高能物理 - 唯象学 · 物理学 2020-07-07 A. Arbey , J. Ellis , F. Mahmoudi

Investigations of CP violation in hadron sector may be done using measurements in the ThO molecule. Recent measurements in this molecule improved the limit on electron EDM by an order of magnitude. Another time reversal (T) and parity (P)…

原子物理 · 物理学 2015-01-13 L. V. Skripnikov , A. N. Petrov , A. V. Titov , V. V. Flambaum

We exhibit a solution to the strong CP problem in which ultraviolet physics renders the QCD theta angle physically unobservable. Our models involve new strong interactions beyond QCD and particles charged under both the new interactions and…

高能物理 - 唯象学 · 物理学 2009-11-10 S. D. H. Hsu , F. Sannino

An analysis of the electric dipole moment (EDM) of the neutron and of the leptons in the minimal supersymmetric standard model (MSSM) with the most general allowed set of CP violating phases without generational mixing is given. The…

高能物理 - 唯象学 · 物理学 2014-11-17 Tarek Ibrahim , Pran Nath

The Higgs sector which is extended from the standard model could generally become an origin of CP violation. In the model with two doublet and one triplet Higgs fields on SU(2) symmetry, we study the electric dipole moment (EDM) of the…

高能物理 - 唯象学 · 物理学 2019-05-07 Noriyuki Oshimo

The storage ring proton electric dipole moment (pEDM) experiment is the first direct search for a proton EDM. It will improve on the current (indirect) limit by at least four orders of magnitude and surpass the current sensitivity (set by…

高能物理 - 实验 · 物理学 2024-09-24 Alexander Keshavarzi

The limits placed by the non-measurement of atomic and neutron electric dipole moments on CP violating phases beyond the SM are found to be not fully justified since the calculations of the expected EDMs lack the full understanding of the…

高能物理 - 唯象学 · 物理学 2010-02-04 Thomas Gajdosik

We report on a new measurement of the CP-violating permanent Electric Dipole Moment (EDM) of the neutral $^{129}$Xe atom. Our experimental approach is based on the detection of the free precession of co-located nuclear spin-polarized $^3$He…

For the neutron to have an electric dipole moment (EDM), the theory of nature must have T, or equivalently CP, violation. Neutron EDM is a very good probe of novel CP violation in beyond the standard model physics. To leverage the…

高能物理 - 格点 · 物理学 2018-04-18 Boram Yoon , Tanmoy Bhattacharya , Rajan Gupta