Journal article
New physics in multi-electron muon decays
The journal of high energy physics, Vol.2023(10), pp.6-22
10/02/2023
DOI: 10.1007/JHEP10(2023)006
Abstract
We study the exotic muon decays with five charged tracks in the final state. First, we investigate the Standard Model rate for mu(+) -> 3e(+) 2e(-) 2 nu (B = 4.0 x 10(-10)) and find that the Mu3e experiment should have tens to hundreds of signal events per 10(15) mu(+) decays, depending on the signal selection strategy. We then turn to a neutrinoless mu(+) -> 3e(+) 2e(-) decay that may arise in new-physics models with lepton-flavor-violating effective operators involving a dark Higgs hd. Following its production in mu(+) -> e(+) h(d) decays, the dark Higgs can undergo a decay cascade to two e(+) e(-) pairs through two dark photons, h(d) -> gamma(d)gamma(d) -> 2(e(+)e(-)). We show that a mu(+) -> 3e(+) 2e(-) search at the Mu3e experiment, with potential sensitivity to the branching ratio at the O(10(-1)2) level or below, can explore new regions of parameter space and new physics scales as high as Lambda similar to 10(15) GeV.
Details
- Title: Subtitle
- New physics in multi-electron muon decays
- Creators
- Matheus Hostert - Perimeter InstituteTony Menzo - University of CincinnatiMaxim Pospelov - University of MinnesotaJure Zupan - University of Cincinnati
- Resource Type
- Journal article
- Publication Details
- The journal of high energy physics, Vol.2023(10), pp.6-22
- DOI
- 10.1007/JHEP10(2023)006
- ISSN
- 1029-8479
- eISSN
- 1029-8479
- Publisher
- Springer Nature
- Number of pages
- 22
- Grant note
- Perimeter Institute for Theoretical Physics OAC-2103889 / NSF; National Science Foundation (NSF) Government of Canada through the Department of Innovation, Science and Economic Development DE-SC0011842; de-sc0011784 / DOE; United States Department of Energy (DOE) Province of Ontario through the Ministry of Research, Innovation and Science; Ministry of Research and Technology of the Republic of Indonesia (RISTEK)
- Language
- English
- Date published
- 10/02/2023
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984946628602771
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