Improved predictions forμ→econversion in nuclei and Higgs-induced lepton flavor violation

2014/04/30 by Andreas Crivellin, Martin Hoferichter, Massimiliano Procura · 1 citation
Physics and Astronomy · #Hadron #Higgs boson #Lepton #Minimal Supersymmetric Standard Model #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Yukawa potential #hep-ex #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevd.89.093024

published as Phys. Rev. D 89, 093024 (2014) · 9 pages, 5 figures, journal version

arxiv created 2014/05/26 · openalex publication_date 2014/05/30 · arxiv updated 2014/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Compared to \ensuremathμ\ensuremath→e\ensuremathγ and \ensuremathμ\ensuremath→eee, the process \ensuremathμ\ensuremath→e conversion in nuclei receives enhanced contributions from Higgs-induced lepton flavor violation. Upcoming \ensuremathμ\ensuremath→e conversion experiments with drastically increased sensitivity will be able to put extremely stringent bounds on Higgs-mediated \ensuremathμ\ensuremath→e transitions. We point out that the theoretical uncertainties associated with these Higgs effects, encoded in the couplings of quark scalar operators to the nucleon, can be accurately assessed using our recently developed approach based on SU(2) chiral perturbation theory that cleanly separates two- and three-flavor observables. We emphasize that with input from lattice QCD for the coupling to strangeness f_s^N, hadronic uncertainties are appreciably reduced compared to the traditional approach where f_s^N is determined from the pion-nucleon \ensuremathσ term by means of an SU(3) relation. We illustrate this point by considering Higgs-mediated lepton flavor violation in the standard model supplemented with higher-dimensional operators, the two-Higgs-doublet model with generic Yukawa couplings, and the minimal supersymmetric standard model. Furthermore, we compare bounds from present and future \ensuremathμ\ensuremath→e conversion and \ensuremathμ\ensuremath→e\ensuremathγ experiments.

Citations

• Muon decay and physics beyond the standard model
• Charged lepton flavor violation in supersymmetric low-scale seesaw models
• Heavy quarkq¯qmatrix elements in the nucleon from perturbative QCD
• Effective Higgs vertices in the generic MSSM
• ON THE TWO-LOOP DECOUPLING CORRECTIONS TO τ-LEPTON AND b-QUARK RUNNING MASSES IN THE MSSM
• Coherent muon-electron conversion in muonic atoms
• Matching coefficients for αsandmbto 𝒪(αs2) in the MSSM
• Massive neutrinos and flavour violation
• Minimal flavour violation: an effective field theory approach
• Resummation of tan β-enhanced supersymmetric loop corrections beyond the decoupling limit
• Evidence for an Excess ofB¯→D(*)τ−ν¯τDecays

Cited by

• Lepton Flavor Violation in the singlet-triplet scotogenic model