The extent of the stop coannihilation strip

Ellis, John; Olive, Keith A.; Zheng, Jiaming

doi:10.1140/epjc/s10052-014-2947-7

The extent of the stop coannihilation strip

Journal Article · Wed Jul 09 00:00:00 EDT 2014 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-014-2947-7· OSTI ID:1816621

Ellis, John ^[1]; Olive, Keith A. ^[2]; Zheng, Jiaming ^[3]

King's College, London (United Kingdom). Dept. of Physics. Theoretical Particle Physics and Cosmology Group; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theory Division; OSTI
Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy and School of Physics and Astronomy. William I. Fine Theoretical Physics Inst.
Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy

Many supersymmetric models such as the constrained minimal supersymmetric extension of the Standard Model (CMSSM) feature a strip in parameter space where the lightest neutralino χ is identified as the lightest supersymmetric particle, the lighter stop squark $$\tilde{t}_1$$ is the next-tolightest supersymmetric particle (NLSP), and the relic χ cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the lighter stop squark $$\tilde{t}_1$$ NLSP. We calculate the stop coannihilation strip in the CMSSM, incorporating Sommerfeld enhancement effects, and we explore the relevant phenomenological constraints and phenomenological signatures. In particular, we show that the $$\tilde{t}_1$$ may weigh several TeV, and its lifetime may be in the nanosecond range, features that are more general than the specific CMSSM scenarios that we study in this paper.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-94ER40823

OSTI ID:: 1816621

Journal Information:: European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 7 Vol. 74; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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The MSSM Parameter Space with Non-Universal Higgs Masses Ellis, John; Olive, Keith A.; Santoso, Yudi arXiv https://doi.org/10.48550/arxiv.hep-ph/0204192	text	January 2002
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Exploration of the MSSM with Non-Universal Higgs Masses Ellis, J.; Falk, T.; Olive, K. A. arXiv https://doi.org/10.48550/arxiv.hep-ph/0210205	text	January 2002
Supersymmetric Dark Matter in Light of WMAP Ellis, J.; Olive, K. A.; Santoso, Y. arXiv https://doi.org/10.48550/arxiv.hep-ph/0303043	text	January 2003
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Model Independent Approach to Focus Point Supersymmetry: from Dark Matter to Collider Searches Baer, Howard; Krupovnickas, Tadas; Profumo, Stefano arXiv https://doi.org/10.48550/arxiv.hep-ph/0507282	text	January 2005
Cosmological Relic Density from Minimal Supergravity with Implications for Collider Physics Baer, Howard; Brhlik, Michal arXiv https://doi.org/10.48550/arxiv.hep-ph/9508321	text	January 1995
Relic Density of Neutralino Dark Matter in Supergravity Models Barger, V.; Kao, Chung arXiv https://doi.org/10.48550/arxiv.hep-ph/9704403	text	January 1997
Constraints on Neutralino Dark Matter from LEP 2 and Cosmology Ellis, John; Falk, Toby; Olive, Keith A. arXiv https://doi.org/10.48550/arxiv.hep-ph/9705444	text	January 1997
Charginos and Neutralinos in the Light of Radiative Corrections: Sealing the Fate of Higgsino Dark Matter Ellis, John; Falk, Toby; Ganis, Gerardo arXiv https://doi.org/10.48550/arxiv.hep-ph/9801445	text	January 1998
FeynHiggs: a program for the calculation of the masses of the neutral CP-even Higgs bosons in the MSSM Heinemeyer, S.; Hollik, W.; Weiglein, G. arXiv https://doi.org/10.48550/arxiv.hep-ph/9812320	text	January 1998
Multi-TeV Scalars are Natural in Minimal Supergravity Feng, Jonathan L.; Matchev, Konstantin T.; Moroi, Takeo arXiv https://doi.org/10.48550/arxiv.hep-ph/9908309	text	January 1999
Light Scalar Top Quarks and Supersymmetric Dark Matter Boehm, C.; Djouadi, A.; Drees, M. arXiv https://doi.org/10.48550/arxiv.hep-ph/9911496	text	January 1999

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