Electric dipole moments as probes of new physics

By M. Pospelov, A. Ritz. 2005

844 citations recorded by the source corpus.

We review several aspects of flavour-diagonal CP-violation, focussing on the role played by the electric dipole moments (EDMs) of leptons, nucleons, atoms, and molecules, which constitute the source of several stringent constraints on new CP-violating physics. We dwell specifically on the calculational aspects of applying the hadronic EDM constraints, reviewing in detail the application of QCD sum-rules to the calculation of nucleon EDMs and CP-odd pion–nucleon couplings. We also consider the current status of EDMs in the Standard Model, and on the ensuing constraints on the underlying sources of CP-violation in physics beyond the Standard Model, focussing on weak-scale supersymmetry.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/88270ce83a4793c03dbf59a3e12e7e0156207e79

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Nuclear and High Energy Physics

Citations in the corpus

Vector-like leptons: Higgs decays and collider phenomenology (2013, neutral): “[38]), well below the current experimental sensitivity.”
Physics potential of the International Axion Observatory (IAXO) (2019, neutral): “0)θ̄×10−3 e fm [10], one finds an extremely strong upper bound, |θ̄| < 1.”
Effective Lagrangian for a light Higgs-like scalar (2013, background): “[39]), and the experimental results for these observables given respectively in ref.”
FLAG Review 2019 (2019, background): “These flavour-diagonal tensor charges g T quantify the contributions of the u, d, s, c quark electric dipole moments (EDM) to the neutron electric dipole moment (nEDM) [832, 936].”
Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era (2018, background): “With potential enhancements of the branching fractions close to the current best upper limits it therefore remains interesting to pursue a search for the B → τ+τ− decays, even though, based on the current experimental precision, a measurement of the SM value will remain out of reach for LHCb. Naivel”
Electric Dipole Moments of Nucleons, Nuclei, and Atoms: The Standard Model and Beyond (2013, background): “t dimension-six CPV operators may cancel leading to a suppression that again allows for O(1) phases and light superpartners. An extensive discussion of (i) and (iii) are given in the reviews of Refs. [14, 26] and the more recent analysis of EDMs in SUSY given in Ref. [88]. Given the comprehensive na”
Electric dipole moments of atoms, molecules, nuclei, and particles (2017, methodology): “(20-21) with Λ → MSUSY, Yf the dimensionless Yukawa coupling for the fermion of interest, are (Pospelov and Ritz, 2005; Ramsey-Musolf and Su, 2008) δe = − qκe√ 32π2 [ g21 12 sinφA + ( 5g22 24 + g21 24 ) sinφµ tanβ ] δq = − qfκf√ 32π2 [√ 2g23 9 ( sinφµRq − sinφA ) + · · · ] δ̃q = − κf√ 32π2 […”
Search for New Physics with Atoms and Molecules (2017, methodology): “The simplest weak-scale SUSY models include oneloop diagrams that lead to EDMs much larger than the experimental limits, unless δSUSYM −2 SUSY <∼ (10 TeV)−2 (Barr, 1993; Engel et al., 2013; Feng, 2013; Pospelov and Ritz, 2005).”
Measuring the electric dipole moment of the electron in BaF (2018, background): “ LHCb experiment [4]. Experiments that search for permanent electric dipole moments (EDMs) are complementary to, and compete with, searches for CP violation with antiparticles at highenergy colliders [5]. A nonzero electron EDM (eEDM) ima corresponding author: s.hoekstra@rug.nl plies the electron ee”
Constraints on CP-violating Higgs couplings to the third generation (2013, methodology): “J H E P 1 1 ( 2 0 1 3 ) 1 8 0 The contributions of the EDM, CEDM, and Weinberg operators to the neutron EDM are then given by [26] (see also [34, 35])”