Implications of a light “dark Higgs” solution to the gμ-2 discrepancy

Chen, Chien-Yi; Davoudiasl, Hooman; Marciano, William J.; Zhang, Cen

doi:10.1103/PhysRevD.93.035006

Title: Implications of a light “dark Higgs” solution to the $g_{μ} - 2$ discrepancy

Journal Article · Fri Feb 05 00:00:00 EST 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.035006· OSTI ID:1254817

Chen, Chien-Yi ^[1]; Davoudiasl, Hooman ^[2]; Marciano, William J. ^[2]; Zhang, Cen ^[2]

Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Victoria, BC (Canada); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
Brookhaven National Lab. (BNL), Upton, NY (United States)

A light scalar Φ with mass ≲1 GeV and muonic coupling O(10^-3) would explain the 3.5σ discrepancy between the Standard Model (SM) muon g-2 prediction and experiment. Such a scalar can be associated with a light remnant of the Higgs mechanism in the “dark” sector. We suggest Φ→l⁺l^- bump hunting in μ→eν$$\vec{v}$$Φ, μ-p→ν_μnΦ (muon capture), and K^±→μ^±νΦ decays as direct probes of this scenario. In a general setup, a potentially observable muon electric dipole moment ≲10^-23 e cm and lepton-flavor-violating decays τ→μ(e)Φ or μ→eΦ can also arise. A deviation in BR(H→μ⁺μ^-) from SM expectations, due to Higgs coupling misalignment, can result depending on certain parameters. Here, we illustrate how the requisite interactions can be mediated by weak-scale vector-like leptons that typically lie within the reach of future LHC measurements.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

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

Grant/Contract Number:: SC00112704; SC0012704

OSTI ID:: 1254817

Alternate ID(s):: OSTI ID: 1237120

Report Number(s):: BNL-112231-2016-JA; PRVDAQ; KA2401012

Journal Information:: Physical Review D, Vol. 93, Issue 3; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 56 works

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Title: Implications of a light “dark Higgs” solution to the $g_{μ} - 2$ discrepancy