Implications of a light “dark Higgs” solution to the discrepancy
- 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→νμnΦ (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.
- 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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