$H\to {\tau }^{+}{\tau }^{-}\gamma$ as a Probe of the $\tau$ Magnetic Dipole Moment

Abstract

Low energy observables involving the Standard Model fermions which are chirality-violating, such as anomalous electromagnetic moments, necessarily involve an insertion of the Higgs in order to maintain $SU(2)\times U(1)$ gauge invariance. As the result, the properties of the Higgs boson measured at the LHC impact our understanding of the associated low-energy quantities. We illustrate this feature with a discussion of the electromagnetic moments of the $\tau$-lepton, as probed by the rare decay $H\to {\tau }^{+}{\tau }^{-}\gamma$. We assess the feasibility of measuring this decay at the LHC, and show that the current bounds from lower energy measurements imply that $13\mathrm{TeV}$ running is very likely to improve our understanding of new physics contributing to the anomalous magnetic moment of the tau.

13 pages, 3 figures

References in corpus (12)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Nonstandard Higgs Boson Decays
• Determining the CP parity of Higgs bosons at the LHC in their tau decay channels
• Determining the CP parity of Higgs bosons at the LHC in the $\tau$ to 1-prong decay channels
• Tau anomalous magnetic moment form factor at Super B/Flavor factories
• Possibility of Determining $\tau$ Lepton Electromagnetic Moments in $\gamma \gamma \to {\tau }^{+}{\tau }^{-}$ Process at the CERN-LHC
• New Observables for CP Violation in Higgs Decays
• Tau spin correlations and the anomalous magnetic moment

Cited by in corpus (4)

• Interference Resurrection of the $\tau$ Dipole through Quantum Tomography
• Democratic three Higgs-doublet models: the custodial limit and wrong-sign Yukawa
• Strategy to measure tau $g-2$ via photon fusion in LHC proton collisions
• Probing Magnetic Moment Operators in $H\gamma$ Production and $H\to {\tau }^{+}{\tau }^{-}\gamma$ Rare Decay