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Title: Gravity waves and gravitino dark matter in μ-hybrid inflation

Abstract

We propose a novel reformulation of supersymmetric (more precisely μ-) hybrid inflation based on a local U(1) or any suitable extension of the minimal supersymmetric standard model (MSSM) which also resolves the μ problem. We employ a suitable Kahler potential which effectively yields quartic inflation with non-minimal coupling to gravity. Imposing the gravitino Big Bang Nucleosynthesis (BBN) constraint on the reheat temperature ( GeV) and requiring a neutralino LSP, the tensor to scalar ratio (r) has a lower bound . The U(1) symmetry breaking scale lies between 108 and 1012 GeV. We also discuss a scenario with gravitino dark matter whose mass is a few GeV.

Authors:
;
Publication Date:
Research Org.:
Univ. of Alabama, Tuscaloosa, AL (United States); Univ. of Delaware, Newark, DE (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1479861
Alternate Identifier(s):
OSTI ID: 1612014
Grant/Contract Number:  
SC0013680; SC0013880
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 787 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics

Citation Formats

Okada, Nobuchika, and Shafi, Qaisar. Gravity waves and gravitino dark matter in μ-hybrid inflation. Netherlands: N. p., 2018. Web. https://doi.org/10.1016/j.physletb.2018.10.057.
Okada, Nobuchika, & Shafi, Qaisar. Gravity waves and gravitino dark matter in μ-hybrid inflation. Netherlands. https://doi.org/10.1016/j.physletb.2018.10.057
Okada, Nobuchika, and Shafi, Qaisar. Sat . "Gravity waves and gravitino dark matter in μ-hybrid inflation". Netherlands. https://doi.org/10.1016/j.physletb.2018.10.057.
@article{osti_1479861,
title = {Gravity waves and gravitino dark matter in μ-hybrid inflation},
author = {Okada, Nobuchika and Shafi, Qaisar},
abstractNote = {We propose a novel reformulation of supersymmetric (more precisely μ-) hybrid inflation based on a local U(1) or any suitable extension of the minimal supersymmetric standard model (MSSM) which also resolves the μ problem. We employ a suitable Kahler potential which effectively yields quartic inflation with non-minimal coupling to gravity. Imposing the gravitino Big Bang Nucleosynthesis (BBN) constraint on the reheat temperature ( GeV) and requiring a neutralino LSP, the tensor to scalar ratio (r) has a lower bound . The U(1) symmetry breaking scale lies between 108 and 1012 GeV. We also discuss a scenario with gravitino dark matter whose mass is a few GeV.},
doi = {10.1016/j.physletb.2018.10.057},
journal = {Physics Letters B},
number = C,
volume = 787,
place = {Netherlands},
year = {2018},
month = {12}
}

Journal Article:
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https://doi.org/10.1016/j.physletb.2018.10.057

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