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Title: Naturalizing supersymmetry with a two-field relaxion mechanism

Abstract

We present a supersymmetric version of a two-field relaxion model that naturalizes tuned versions of supersymmetry. This arises from a relaxion mechanism that does not depend on QCD dynamics and where the relaxion potential barrier height is controlled by a second axion-like field. During the cosmological evolution, the relaxion rolls with a nonzero value that breaks supersymmetry and scans the soft supersymmetric mass terms. Electroweak symmetry is broken after the soft masses become of order the supersymmetric Higgs mass term and causes the relaxion to stop rolling for superpartner masses up to ~10 9 GeV. This can explain the tuning in supersymmetric models, including split-SUSY models, while preserving the QCD axion solution to the strong CP problem. Furthermore, besides predicting two very weakly-coupled axion-like particles, the supersymmetric spectrum may contain an extra Goldstino, which could be a viable dark matter candidate.

Authors:
 [1];  [2];  [2];  [2]
  1. KIAS, Seoul (Korea)
  2. Univ. of Minnesota, Minneapolis, MN (United States)
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1360126
Grant/Contract Number:  
SC0011842
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; phenomenological models; supersymmetry phenomenology

Citation Formats

Evans, Jason L., Gherghetta, Tony, Nagata, Natsumi, and Thomas, Zachary. Naturalizing supersymmetry with a two-field relaxion mechanism. United States: N. p., 2016. Web. doi:10.1007/JHEP09(2016)150.
Evans, Jason L., Gherghetta, Tony, Nagata, Natsumi, & Thomas, Zachary. Naturalizing supersymmetry with a two-field relaxion mechanism. United States. doi:10.1007/JHEP09(2016)150.
Evans, Jason L., Gherghetta, Tony, Nagata, Natsumi, and Thomas, Zachary. Mon . "Naturalizing supersymmetry with a two-field relaxion mechanism". United States. doi:10.1007/JHEP09(2016)150. https://www.osti.gov/servlets/purl/1360126.
@article{osti_1360126,
title = {Naturalizing supersymmetry with a two-field relaxion mechanism},
author = {Evans, Jason L. and Gherghetta, Tony and Nagata, Natsumi and Thomas, Zachary},
abstractNote = {We present a supersymmetric version of a two-field relaxion model that naturalizes tuned versions of supersymmetry. This arises from a relaxion mechanism that does not depend on QCD dynamics and where the relaxion potential barrier height is controlled by a second axion-like field. During the cosmological evolution, the relaxion rolls with a nonzero value that breaks supersymmetry and scans the soft supersymmetric mass terms. Electroweak symmetry is broken after the soft masses become of order the supersymmetric Higgs mass term and causes the relaxion to stop rolling for superpartner masses up to ~109 GeV. This can explain the tuning in supersymmetric models, including split-SUSY models, while preserving the QCD axion solution to the strong CP problem. Furthermore, besides predicting two very weakly-coupled axion-like particles, the supersymmetric spectrum may contain an extra Goldstino, which could be a viable dark matter candidate.},
doi = {10.1007/JHEP09(2016)150},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2016,
place = {United States},
year = {Mon Sep 26 00:00:00 EDT 2016},
month = {Mon Sep 26 00:00:00 EDT 2016}
}

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Cited by: 11 works
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