$L_\mu - L_\tau$ theory of Higgs flavor violation and $(g-2)_\mu$

Altmannshofer, Wolfgang; Carena, Marcela; Crivellin, Andreas

doi:10.1103/PhysRevD.94.095026

Title: $$L_\mu - L_\tau$$ theory of Higgs flavor violation and $$(g-2)_\mu$$

Journal Article · Tue Nov 01 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.94.095026· OSTI ID:1288749

^[1]; Carena, Marcela ^[2]; Crivellin, Andreas ^[3]

Univ. of Cincinnati, OH (United States)
Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Paul Scherrer Inst. (PSI), Villigen (Switzerland)

Several experiments reported hints for the violation of lepton flavor or lepton flavor universality in processes involving muons. Most prominently, there is the hint for a nonzero rate of the flavor violating Higgs decay h→τμ at the LHC, as well as the hint for lepton flavor universality violation in rare B meson decays at the LHCb. In addition, also the long-standing discrepancy in the anomalous magnetic moment of the muon motivates new physics connected to muons. A symmetry which violates lepton flavor universality is Lμ-Lτ: the difference of muon number and tau number. We show that adding vectorlike fermions to a Lμ-Lτ theory generates naturally an effect in the anomalous magnetic moment of the muon and h→τμ, while effects in other τ→μ transitions are systematically suppressed by symmetry arguments. We find that if Lμ-Lτ is gauged it is possible to also accommodate the discrepant b→sμμ data while predicting a τ→3μ and a modified h→μμ rate within reach of upcoming experiments.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1288749

Report Number(s):: PSI-PR-16-04; FERMILAB-PUB-16-131-T; arXiv:1604.08221; 1452807

Journal Information:: Physical Review D, Vol. D94, Issue 9; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 71 works

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Review of lepton universality tests in B decays Bifani, Simone; Descotes-Genon, Sébastien; Vidal, Antonio Romero Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 2 https://doi.org/10.1088/1361-6471/aaf5de	journal	December 2018
Large $h \to b s$ in generic two-Higgs-doublet models Crivellin, Andreas; Heeck, Julian; Müller, Dario Physical Review D, Vol. 97, Issue 3 https://doi.org/10.1103/physrevd.97.035008	journal	February 2018
Implications for new physics in $$b\rightarrow s \mu \mu $$b→sμμ transitions after recent measurements by Belle and LHCb Kowalska, Kamila; Kumar, Dinesh; Sessolo, Enrico Maria The European Physical Journal C, Vol. 79, Issue 10 https://doi.org/10.1140/epjc/s10052-019-7330-2	journal	October 2019
Review of Lepton Universality tests in B decays Bifani, Simone; Descotes-Genon, Sebastien; Vidal, Antonio Romero arXiv https://doi.org/10.48550/arxiv.1809.06229	text	January 2018

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