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Title: Gravitino decay in high scale supersymmetry with R -parity violation

Abstract

Here, we consider the effects of R-parity violation due to the inclusion of a bilinear μ'LH u 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 × 10 13 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: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: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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.98.015030

Citation Metrics:
Cited by: 12 works
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