$$L_\mu - L_\tau$$ theory of Higgs flavor violation and $$(g-2)_\mu$$
Abstract
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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1288749
- Report Number(s):
- PSI-PR-16-04; FERMILAB-PUB-16-131-T; arXiv:1604.08221
Journal ID: ISSN 2470-0010; 1452807
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: D94; Journal Issue: 9; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Altmannshofer, Wolfgang, Carena, Marcela, and Crivellin, Andreas. $L_\mu - L_\tau$ theory of Higgs flavor violation and $(g-2)_\mu$. United States: N. p., 2016.
Web. doi:10.1103/PhysRevD.94.095026.
Altmannshofer, Wolfgang, Carena, Marcela, & Crivellin, Andreas. $L_\mu - L_\tau$ theory of Higgs flavor violation and $(g-2)_\mu$. United States. https://doi.org/10.1103/PhysRevD.94.095026
Altmannshofer, Wolfgang, Carena, Marcela, and Crivellin, Andreas. Tue .
"$L_\mu - L_\tau$ theory of Higgs flavor violation and $(g-2)_\mu$". United States. https://doi.org/10.1103/PhysRevD.94.095026. https://www.osti.gov/servlets/purl/1288749.
@article{osti_1288749,
title = {$L_\mu - L_\tau$ theory of Higgs flavor violation and $(g-2)_\mu$},
author = {Altmannshofer, Wolfgang and Carena, Marcela and Crivellin, Andreas},
abstractNote = {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.},
doi = {10.1103/PhysRevD.94.095026},
journal = {Physical Review D},
number = 9,
volume = D94,
place = {United States},
year = {Tue Nov 01 00:00:00 EDT 2016},
month = {Tue Nov 01 00:00:00 EDT 2016}
}
Web of Science
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