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Title: Stop co-annihilation in the minimal supersymmetric standard model revisited

Abstract

We reexamine the stop co-annihilation scenario of the minimal supersymmetric standard model, wherein a binolike lightest supersymmetric particle has a thermal relic density set by co-annihilations with a scalar partner of the top quark in the early universe. We concentrate on the case where only the top partner sector is relevant for the cosmology, and other particles are heavy. We discuss the cosmology with focus on low energy parameters and an emphasis on the implications of the measured Higgs boson mass and its properties. We find that the irreducible direct detection signal correlated with this cosmology is generically well below projected experimental sensitivity, and in most cases lies below the neutrino background. A larger, detectable, direct detection rate is possible, but is unrelated to the co-annihilation cosmology. LHC searches for compressed spectra are crucial for probing this scenario

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1417071
Alternate Identifier(s):
OSTI ID: 1498900
Grant/Contract Number:  
SC0007859
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 2; 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; 79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Pierce, Aaron, Shah, Nausheen R., and Vogl, Stefan. Stop co-annihilation in the minimal supersymmetric standard model revisited. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.023008.
Pierce, Aaron, Shah, Nausheen R., & Vogl, Stefan. Stop co-annihilation in the minimal supersymmetric standard model revisited. United States. doi:10.1103/PhysRevD.97.023008.
Pierce, Aaron, Shah, Nausheen R., and Vogl, Stefan. Tue . "Stop co-annihilation in the minimal supersymmetric standard model revisited". United States. doi:10.1103/PhysRevD.97.023008.
@article{osti_1417071,
title = {Stop co-annihilation in the minimal supersymmetric standard model revisited},
author = {Pierce, Aaron and Shah, Nausheen R. and Vogl, Stefan},
abstractNote = {We reexamine the stop co-annihilation scenario of the minimal supersymmetric standard model, wherein a binolike lightest supersymmetric particle has a thermal relic density set by co-annihilations with a scalar partner of the top quark in the early universe. We concentrate on the case where only the top partner sector is relevant for the cosmology, and other particles are heavy. We discuss the cosmology with focus on low energy parameters and an emphasis on the implications of the measured Higgs boson mass and its properties. We find that the irreducible direct detection signal correlated with this cosmology is generically well below projected experimental sensitivity, and in most cases lies below the neutrino background. A larger, detectable, direct detection rate is possible, but is unrelated to the co-annihilation cosmology. LHC searches for compressed spectra are crucial for probing this scenario},
doi = {10.1103/PhysRevD.97.023008},
journal = {Physical Review D},
number = 2,
volume = 97,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.97.023008

Citation Metrics:
Cited by: 10 works
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Figures / Tables:

FIG.  1 FIG. 1: Impact of δρ (excluded red region), vacuum stability (excluded purple region) and Higgs phenomenology (excluded orange region) on the sector. Also shown in green is the region that yields a observationally consistent Higgs boson mass 122 < mh < 128 GeV; there are two overlapping regions correspondingmore » to different sign choices for the gluino mass. (a) m1 = 600 GeV, (b) m1 = 1.5 TeV. Also shown are contours where the sbottom is degenerate with the stop (solid) or within ±5 GeV [dashed (-)/dotted (+)].« less

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