Naturalizing supersymmetry with a two-field relaxion mechanism

Evans, Jason L.; Gherghetta, Tony; Nagata, Natsumi; Thomas, Zachary

doi:10.1007/JHEP09(2016)150

Title: Naturalizing supersymmetry with a two-field relaxion mechanism

Journal Article · Mon Sep 26 00:00:00 EDT 2016 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP09(2016)150· OSTI ID:1360126

Evans, Jason L. ^[1]; Gherghetta, Tony ^[2]; Nagata, Natsumi ^[2]; Thomas, Zachary ^[2]

KIAS, Seoul (Korea)
Univ. of Minnesota, Minneapolis, MN (United States)

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.

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Research Organization:: Univ. of Minnesota, Minneapolis, MN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0011842

OSTI ID:: 1360126

Journal Information:: Journal of High Energy Physics (Online), Vol. 2016, Issue 9; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 28 works

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Title: Naturalizing supersymmetry with a two-field relaxion mechanism

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