Low-energy probes of no-scale SU(5) super-GUTs
Abstract
We explore the possible values of the μ → eγ branching ratio, BR(μ → eγ), and the electron dipole moment (eEDM), de, in no-scale SU(5) super-GUT models with the boundary conditions that soft supersymmetry-breaking matter scalar masses vanish at some high input scale, Min, above the GUT scale, MGUT. We take into account the constraints from the cosmological cold dark matter density, ΩCDMh2, the Higgs mass, Mh, and the experimental lower limit on the lifetime for p → K+ν¯, the dominant proton decay mode in these super-GUT models. Reconciling this limit with ΩCDMh2 and Mh requires the Higgs field responsible for the charge-2/3 quark masses to be twisted, and possibly also that responsible for the charge-1/3 and charged-lepton masses, with model-dependent soft supersymmetry-breaking masses. We consider six possible models for the super-GUT initial conditions, and two possible choices for quark flavor mixing, contrasting their predictions for proton decay with versions of the models in which mixing effects are neglected. We find that τ(p → K+ν¯) may be accessible to the upcoming Hyper-Kamiokande experiment, whereas all the models predict BR(μ → eγ) and de below the current and prospective future experimental sensitivities or both flavor choices, when the dark matter density,more »
- Authors:
-
- King's College, London (United Kingdom); European Organization for Nuclear Research (CERN), Geneva (Switzerland); National Inst. of Chemical Physics & Biophysics, Tallinn (Estonia)
- Shanghai Jiao Tong Univ. (China)
- Univ. of Tokyo (Japan)
- Univ. of Minnesota, Minneapolis, MN (United States)
- Univ. of Bergen (Norway); Korea Inst. for Advanced Study, Seoul (South Korea)
- Publication Date:
- Research Org.:
- Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1837509
- Grant/Contract Number:
- SC0011842; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- European Physical Journal. C, Particles and Fields
- Additional Journal Information:
- Journal Volume: 81; Journal Issue: 2; Journal ID: ISSN 1434-6044
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Ellis, John, Evans, Jason L., Nagata, Natsumi, Olive, Keith A., and Velasco-Sevilla, L. Low-energy probes of no-scale SU(5) super-GUTs. United States: N. p., 2021.
Web. doi:10.1140/epjc/s10052-021-08903-5.
Ellis, John, Evans, Jason L., Nagata, Natsumi, Olive, Keith A., & Velasco-Sevilla, L. Low-energy probes of no-scale SU(5) super-GUTs. United States. https://doi.org/10.1140/epjc/s10052-021-08903-5
Ellis, John, Evans, Jason L., Nagata, Natsumi, Olive, Keith A., and Velasco-Sevilla, L. Thu .
"Low-energy probes of no-scale SU(5) super-GUTs". United States. https://doi.org/10.1140/epjc/s10052-021-08903-5. https://www.osti.gov/servlets/purl/1837509.
@article{osti_1837509,
title = {Low-energy probes of no-scale SU(5) super-GUTs},
author = {Ellis, John and Evans, Jason L. and Nagata, Natsumi and Olive, Keith A. and Velasco-Sevilla, L.},
abstractNote = {We explore the possible values of the μ → eγ branching ratio, BR(μ → eγ), and the electron dipole moment (eEDM), de, in no-scale SU(5) super-GUT models with the boundary conditions that soft supersymmetry-breaking matter scalar masses vanish at some high input scale, Min, above the GUT scale, MGUT. We take into account the constraints from the cosmological cold dark matter density, ΩCDMh2, the Higgs mass, Mh, and the experimental lower limit on the lifetime for p → K+ν¯, the dominant proton decay mode in these super-GUT models. Reconciling this limit with ΩCDMh2 and Mh requires the Higgs field responsible for the charge-2/3 quark masses to be twisted, and possibly also that responsible for the charge-1/3 and charged-lepton masses, with model-dependent soft supersymmetry-breaking masses. We consider six possible models for the super-GUT initial conditions, and two possible choices for quark flavor mixing, contrasting their predictions for proton decay with versions of the models in which mixing effects are neglected. We find that τ(p → K+ν¯) may be accessible to the upcoming Hyper-Kamiokande experiment, whereas all the models predict BR(μ → eγ) and de below the current and prospective future experimental sensitivities or both flavor choices, when the dark matter density, Higgs mass and current proton decay constraints are taken into account. However, there are limited regions with one of the flavor choices in two of the models where μ → e conversion on a heavy nucleus may be observable in the future. Our results indicate that there is no supersymmetric flavor problem in the class of no-scale models we consider.},
doi = {10.1140/epjc/s10052-021-08903-5},
journal = {European Physical Journal. C, Particles and Fields},
number = 2,
volume = 81,
place = {United States},
year = {Thu Feb 04 00:00:00 EST 2021},
month = {Thu Feb 04 00:00:00 EST 2021}
}
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