Gravitino decay in high scale supersymmetry with -parity violation
Abstract
Here, we consider the effects of R-parity violation due to the inclusion of a bilinear μ'LHu superpotential term in high-scale supersymmetric models with an EeV scale gravitino as dark matter. Although the typical phenomenological limits on this coupling (e.g., due to lepton number violation and the preservation of the baryon asymmetry) are relaxed when the supersymmetric mass spectrum is assumed to be heavy (in excess of the inflationary scale of 3 × 1013 GeV), the requirement that the gravitino be sufficiently long lived so as to account for the observed dark matter density, leads to a relatively strong bound on μ' ≲ 20 GeV. The dominant decay channels for the longitudinal component of the gravitino are Zν, W±l∓, and hν. To avoid an excess neutrino signal in IceCube, our limit on μ' is then strengthened to μ' ≲ 50 keV. When the bound is saturated, we find that there is a potentially detectable flux of monochromatic neutrinos with EeV energies.
- Authors:
- Publication Date:
- Research Org.:
- Chicago Operations Office, Argonne, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1461229
- Alternate Identifier(s):
- OSTI ID: 1498653
- Grant/Contract Number:
- SC0011842; 06482; 674896; 690575
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 98 Journal Issue: 1; 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
Dudas, Emilian, Gherghetta, Tony, Kaneta, Kunio, Mambrini, Yann, and Olive, Keith A. Gravitino decay in high scale supersymmetry with R -parity violation. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.015030.
Dudas, Emilian, Gherghetta, Tony, Kaneta, Kunio, Mambrini, Yann, & Olive, Keith A. Gravitino decay in high scale supersymmetry with R -parity violation. United States. doi:https://doi.org/10.1103/PhysRevD.98.015030
Dudas, Emilian, Gherghetta, Tony, Kaneta, Kunio, Mambrini, Yann, and Olive, Keith A. Mon .
"Gravitino decay in high scale supersymmetry with R -parity violation". United States. doi:https://doi.org/10.1103/PhysRevD.98.015030.
@article{osti_1461229,
title = {Gravitino decay in high scale supersymmetry with R -parity violation},
author = {Dudas, Emilian and Gherghetta, Tony and Kaneta, Kunio and Mambrini, Yann and Olive, Keith A.},
abstractNote = {Here, we consider the effects of R-parity violation due to the inclusion of a bilinear μ'LHu superpotential term in high-scale supersymmetric models with an EeV scale gravitino as dark matter. Although the typical phenomenological limits on this coupling (e.g., due to lepton number violation and the preservation of the baryon asymmetry) are relaxed when the supersymmetric mass spectrum is assumed to be heavy (in excess of the inflationary scale of 3 × 1013 GeV), the requirement that the gravitino be sufficiently long lived so as to account for the observed dark matter density, leads to a relatively strong bound on μ' ≲ 20 GeV. The dominant decay channels for the longitudinal component of the gravitino are Zν, W±l∓, and hν. To avoid an excess neutrino signal in IceCube, our limit on μ' is then strengthened to μ' ≲ 50 keV. When the bound is saturated, we find that there is a potentially detectable flux of monochromatic neutrinos with EeV energies.},
doi = {10.1103/PhysRevD.98.015030},
journal = {Physical Review D},
number = 1,
volume = 98,
place = {United States},
year = {2018},
month = {7}
}
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DOI: https://doi.org/10.1103/PhysRevD.98.015030
DOI: https://doi.org/10.1103/PhysRevD.98.015030
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