Gluino coannihilation revisited

Ellis, John; Luo, Feng; Olive, Keith A.

doi:10.1007/JHEP09(2015)127

Title: Gluino coannihilation revisited

Abstract

In this study, some variants of the MSSM feature a strip in parameter space where the lightest neutralino χ is identified as the lightest supersymmetric particle (LSP), the gluino g^~ is the next-to-lightest supersymmetric particle (NLSP) and is nearly degenerate with χ, and the relic cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the gluino NLSP. We calculate the relic density along this gluino coannihilation strip in the MSSM, including the effects of gluino-gluino bound states and initial-state Sommerfeld enhancement, and taking into account the decoupling of the gluino and LSP densities that occurs for large values of the squark mass m_q^~. We find that bound-state effects can increase the maximum m _χ for which the relic cold dark matter density lies within the range favoured by astrophysics and cosmology by as much as ~50% if m_q^~/m_g^~=1.1 , and that the LSP may weigh up to ~8 TeV for a wide range of m_q^~/m_g^~≲100 .

Authors:

Ellis, John ^[1]; Luo, Feng ^[2]; Olive, Keith A. ^[3]

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

Publication Date:: Mon Sep 21 00:00:00 EDT 2015

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

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1454577

Grant/Contract Number:: SC0011842; FG02-88ER40388; FG02-93ER40762

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; 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; 79 ASTRONOMY AND ASTROPHYSICS; Supersymmetry Phenomenology

Citation Formats


                    Ellis, John, Luo, Feng, and Olive, Keith A. Gluino coannihilation revisited.  United States: N. p., 2015. 
Web.  doi:10.1007/JHEP09(2015)127.

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                    Ellis, John, Luo, Feng, & Olive, Keith A. Gluino coannihilation revisited.  United States.  https://doi.org/10.1007/JHEP09(2015)127

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                    Ellis, John, Luo, Feng, and Olive, Keith A. Mon .  
"Gluino coannihilation revisited".  United States.  https://doi.org/10.1007/JHEP09(2015)127.  https://www.osti.gov/servlets/purl/1454577.

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@article{osti_1454577,

  title        = {Gluino coannihilation revisited},

  author       = {Ellis, John and Luo, Feng and Olive, Keith A.},

  abstractNote = {In this study, some variants of the MSSM feature a strip in parameter space where the lightest neutralino χ is identified as the lightest supersymmetric particle (LSP), the gluino g~ is the next-to-lightest supersymmetric particle (NLSP) and is nearly degenerate with χ, and the relic cold dark matter density is brought into the range allowed by astrophysics and cosmology by coannihilation with the gluino NLSP. We calculate the relic density along this gluino coannihilation strip in the MSSM, including the effects of gluino-gluino bound states and initial-state Sommerfeld enhancement, and taking into account the decoupling of the gluino and LSP densities that occurs for large values of the squark mass mq~. We find that bound-state effects can increase the maximum m χ for which the relic cold dark matter density lies within the range favoured by astrophysics and cosmology by as much as ~50% if mq~/mg~=1.1 , and that the LSP may weigh up to ~8 TeV for a wide range of mq~/mg~≲100 .},

  doi          = {10.1007/JHEP09(2015)127},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 9,

  volume       = 2015,

  place        = {United States},

  year         = {Mon Sep 21 00:00:00 EDT 2015},

  month        = {Mon Sep 21 00:00:00 EDT 2015}

}

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We use MasterCode to perform a frequentist analysis of the constraints on a phenomenological MSSM model with 11 parameters, the pMSSM11, including constraints from ~36/fb of LHC data at 13 TeV and PICO, XENON1T and PandaX-II searches for dark matter scattering, as well as previous accelerator and astrophysical measurements, presenting fits both with and without the (g–2)μ constraint. The pMSSM11 is specified by the following parameters: 3 gaugino masses M_1,2,3, a common mass for the first-and second-generation squarks m_{more » $$\tilde{q}$$} and a distinct third-generation squark mass m_{$$\tilde{q}3$$}, a common mass for the first-and second-generation sleptons m_{$$\tilde{ℓ}$$} and a distinct third-generation slepton mass m$$\tilde{τ}$$, a common trilinear mixing parameter A, the Higgs mixing parameter μ, the pseudoscalar Higgs mass M_A and tan β. In the fit including (g–2)_μ, a Bino-like $$\tilde{χ}{0\atop{1}}$$ is preferred, whereas a Higgsino-like $$\tilde{χ}{0\atop{1}}$$ is mildly favoured when the (g–2)_μ constraint is dropped. We identify the mechanisms that operate in different regions of the pMSSM11 parameter space to bring the relic density of the lightest neutralino, $$\tilde{χ}{0\atop{1}}$$, into the range indicated by cosmological data. In the fit including (g–2)_μ, coannihilations with $$\tilde{χ}{0\atop{2}}$$ and the Wino-like $$\tilde{χ}{±\atop{1}}$$ or with nearly-degenerate first- and second-generation sleptons are active, whereas coannihilations with the $$\tilde{χ}{0\atop{2}}$$ and the Higgsino-like $$\tilde{χ}{±\atop{1}}$$ or with first- and second-generation squarks may be important when the (g–2)_μ constraint is dropped. In the two cases, we present χ² functions in two-dimensional mass planes as well as their one-dimensional profile projections and best-fit spectra. Prospects remain for discovering strongly-interacting sparticles at the LHC, in both the scenarios with and without the (g–2)_μ constraint, as well as for discovering e⁺e^- collider such as the ILC or CLIC.« less
Cited by 83
https://doi.org/10.1140/epjc/s10052-018-5697-0
Galactic-centre gamma rays in CMSSM dark matter scenarios

Journal Article Ellis, John ; Olive, Keith A. ; Spanos, Vassilis C., E-mail: john.ellis@cern.ch, E-mail: olive@physics.umn.edu, E-mail: spanos@inp.demokritos.gr - Journal of Cosmology and Astroparticle Physics

We study the production of γ rays via LSP annihilations in the core of the Galaxy as a possible experimental signature of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which supersymmetry-breaking parameters are assumed to be universal at the GUT scale, assuming also that the LSP is the lightest neutralino χ. The part of the CMSSM parameter space that is compatible with the measured astrophysical density of cold dark matter is known to include a (τ-tilde {sub 1})−χ coannihilation strip, a focus-point strip where χ has an enhanced Higgsino component, and a funnel at large tanmore »« less
https://doi.org/10.1088/1475-7516/2011/10/024

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Title: Gluino coannihilation revisited

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Citation Formats

NLSP Gluino Search at the Tevatron and early LHC text, January 2010

Supersymmetric relics from the big bang journal, June 1984

Heavy Sneutrinos as Dark Matter text, January 1994

Gluino Decays in Split Supersymmetry text, January 2005

Gluino pair production at the LHC: The threshold journal, April 2012

Cosmology and astrophysics of minimal dark matter journal, December 2007

Calculations of neutralino-stop coannihilation in the CMSSM journal, January 2003

Heavy sneutrinos as dark matter journal, November 1994

The extent of the stop coannihilation strip journal, July 2014

Sommerfeld corrections to type-II and III leptogenesis text, January 2008

Quark-antiquark potential in QCD journal, October 1977

Gluino Pair Production at the LHC: The Threshold text, January 2011

Cosmic abundances of stable particles: Improved analysis journal, August 1991

A Closer Look at Gaugino Masses in Pure Gravity Mediation Model/Minimal Split SUSY Model text, January 2013

Accurate relic densities with neutralino, chargino and sfermion coannihilations in mSUGRA journal, April 2003

Light Scalar Top Quarks and Supersymmetric Dark Matter text, January 1999

Bound-state effects on gluino-pair production at hadron colliders journal, October 2009

Über die Beugung und Bremsung der Elektronen journal, January 1931

Compressed supersymmetry and natural neutralino dark matter from top squark-mediated annihilation to top quarks journal, June 2007

Cosmology and Astrophysics of Minimal Dark Matter text, January 2007

Higgs bosons in supersymmetric models (I) journal, July 1986

Heavy neutralino relic abundance with Sommerfeld enhancements - a study of pMSSM scenarios text, January 2015

Non-perturbative effect on thermal relic abundance of dark matter journal, March 2007

Hidden charged dark matter journal, July 2009

Constraint on the Photino Mass from Cosmology journal, May 1983

Accurate relic densities with neutralino, chargino and sfermion coannihilations in mSUGRA text, January 2003

Gluino decays in Split Supersymmetry journal, October 2005

The Sommerfeld enhancement for scalar particles and application to sfermion co-annihilation regions journal, May 2011

Sommerfeld corrections to type-II and type-III leptogenesis journal, March 2009

Calculations of relic densities in the early universe journal, December 1988

Heavy neutralino relic abundance with Sommerfeld enhancements — a study of pMSSM scenarios journal, March 2015

Light Stop from b-tau Yukawa Unification text, January 2011

LHC constraints on NLSP gluino and dark matter neutralino in Yukawa unified models journal, November 2011

Hidden Charged Dark Matter text, January 2009

Light scalar top quarks and supersymmetric dark matter journal, July 2000

On the feasibility of a stop NLSP in gravitino dark matter scenarios journal, May 2007

Light stop from b–τ Yukawa unification journal, January 2012

Relic abundance of light photinos journal, November 1997

Neutralino Dark Matter at 14 and 100 TeV text, January 2014

The Extent of the Stop Coannihilation Strip text, January 2014

Bound-state formation for thermal relic dark matter and unitarity text, January 2014

Bound-state formation for thermal relic dark matter and unitarity journal, December 2014

Heavy gluino as the lightest supersymmetric particle journal, February 1999

Scenarios for gluino coannihilation journal, February 2016

Gluino Coannihilation and Observability of Gluinos at LHC RUN II text, January 2016

TeV-Scale Thermal WIMPs: Unitarity and its Consequences text, January 2019

How heavy can neutralino dark matter be? journal, April 2019

Likelihood analysis of the pMSSM11 in light of LHC 13-TeV data text, January 2018

LHC Phenomenology of Dark Matter with a Color-Octet Partner text, January 2018

Likelihood Analysis of the pMSSM11 in Light of LHC 13-TeV Data text, January 2017

Flavor-Safe Light Squarks in Higgs-Anomaly Mediation text, January 2018

Cornering compressed gluino at the LHC journal, March 2017

Likelihood analysis of the sub-GUT MSSM in light of LHC 13-TeV data text, January 2018

Top-philic dark matter within and beyond the WIMP paradigm text, January 2018

Probing Bino-Wino coannihilation at the LHC journal, October 2015

WIMP dark matter candidates and searches—current status and future prospects journal, May 2018

Global fits of GUT-scale SUSY models with GAMBIT text, January 2017

Case for an EeV Gravitino journal, July 2017

Scenarios for Gluino Coannihilation text, January 2015

Global fits of GUT-scale SUSY models with GAMBIT text, January 2017

How Heavy can Neutralino Dark Matter be? text, January 2018

Gluino coannihilation and observability of gluinos at LHC run II journal, May 2016

Likelihood Analysis of the pMSSM11 in Light of LHC 13-TeV Data text, January 2017

Whac-a-constraint with anomaly-free dark matter models journal, January 2019

Global fits of GUT-scale SUSY models with GAMBIT journal, December 2017

Likelihood analysis of the sub-GUT MSSM in light of LHC 13-TeV data journal, February 2018

Coannihilation without chemical equilibrium journal, November 2017

WIMP dark matter candidates and searches - current status and future prospects text, January 2017

A minimal SU(5) SuperGUT in pure gravity mediation journal, June 2019

A Very Heavy Sneutrino as Viable Thermal Dark Matter Candidate in $U(1)'$ Extensions of the MSSM text, January 2017

Effects of QCD bound states on dark matter relic abundance journal, February 2017

Top-philic dark matter within and beyond the WIMP paradigm journal, April 2018

Coannihilation without chemical equilibrium text, January 2017

Stop coannihilation in the CMSSM and SubGUT models journal, May 2018

Producing a new Fermion in Coherent Elastic Neutrino-Nucleus Scattering: from Neutrino Mass to Dark Matter text, January 2018

Producing a new fermion in coherent elastic neutrino-nucleus scattering: from neutrino mass to dark matter journal, December 2018

A very heavy sneutrino as viable thermal dark matter candidate in U(1)′ extensions of the MSSM journal, April 2019

NLSP Gluino Search at the Tevatron and early LHC
text, January 2010

Supersymmetric relics from the big bang
journal, June 1984

Heavy Sneutrinos as Dark Matter
text, January 1994

Gluino Decays in Split Supersymmetry
text, January 2005

Gluino pair production at the LHC: The threshold
journal, April 2012

Cosmology and astrophysics of minimal dark matter
journal, December 2007

Calculations of neutralino-stop coannihilation in the CMSSM
journal, January 2003

Heavy sneutrinos as dark matter
journal, November 1994

The extent of the stop coannihilation strip
journal, July 2014

Sommerfeld corrections to type-II and III leptogenesis
text, January 2008

Quark-antiquark potential in QCD
journal, October 1977

Gluino Pair Production at the LHC: The Threshold
text, January 2011

Cosmic abundances of stable particles: Improved analysis
journal, August 1991

A Closer Look at Gaugino Masses in Pure Gravity Mediation Model/Minimal Split SUSY Model
text, January 2013

Accurate relic densities with neutralino, chargino and sfermion coannihilations in mSUGRA
journal, April 2003

Light Scalar Top Quarks and Supersymmetric Dark Matter
text, January 1999

Bound-state effects on gluino-pair production at hadron colliders
journal, October 2009

Über die Beugung und Bremsung der Elektronen
journal, January 1931

Compressed supersymmetry and natural neutralino dark matter from top squark-mediated annihilation to top quarks
journal, June 2007

Cosmology and Astrophysics of Minimal Dark Matter
text, January 2007

Higgs bosons in supersymmetric models (I)
journal, July 1986

Heavy neutralino relic abundance with Sommerfeld enhancements - a study of pMSSM scenarios
text, January 2015

Non-perturbative effect on thermal relic abundance of dark matter
journal, March 2007

Hidden charged dark matter
journal, July 2009

Constraint on the Photino Mass from Cosmology
journal, May 1983

Accurate relic densities with neutralino, chargino and sfermion coannihilations in mSUGRA
text, January 2003

Gluino decays in Split Supersymmetry
journal, October 2005

The Sommerfeld enhancement for scalar particles and application to sfermion co-annihilation regions
journal, May 2011

Sommerfeld corrections to type-II and type-III leptogenesis
journal, March 2009

Calculations of relic densities in the early universe
journal, December 1988

Heavy neutralino relic abundance with Sommerfeld enhancements — a study of pMSSM scenarios
journal, March 2015

Light Stop from b-tau Yukawa Unification
text, January 2011

LHC constraints on NLSP gluino and dark matter neutralino in Yukawa unified models
journal, November 2011

Hidden Charged Dark Matter
text, January 2009

Light scalar top quarks and supersymmetric dark matter
journal, July 2000

On the feasibility of a stop NLSP in gravitino dark matter scenarios
journal, May 2007

Light stop from b–τ Yukawa unification
journal, January 2012

Relic abundance of light photinos
journal, November 1997

Neutralino Dark Matter at 14 and 100 TeV
text, January 2014

The Extent of the Stop Coannihilation Strip
text, January 2014

Bound-state formation for thermal relic dark matter and unitarity
text, January 2014

Bound-state formation for thermal relic dark matter and unitarity
journal, December 2014

Heavy gluino as the lightest supersymmetric particle
journal, February 1999

Scenarios for gluino coannihilation
journal, February 2016

Gluino Coannihilation and Observability of Gluinos at LHC RUN II
text, January 2016

TeV-Scale Thermal WIMPs: Unitarity and its Consequences
text, January 2019

How heavy can neutralino dark matter be?
journal, April 2019

Likelihood analysis of the pMSSM11 in light of LHC 13-TeV data
text, January 2018

LHC Phenomenology of Dark Matter with a Color-Octet Partner
text, January 2018

Likelihood Analysis of the pMSSM11 in Light of LHC 13-TeV Data
text, January 2017

Flavor-Safe Light Squarks in Higgs-Anomaly Mediation
text, January 2018

Cornering compressed gluino at the LHC
journal, March 2017

Likelihood analysis of the sub-GUT MSSM in light of LHC 13-TeV data
text, January 2018

Top-philic dark matter within and beyond the WIMP paradigm
text, January 2018

Probing Bino-Wino coannihilation at the LHC
journal, October 2015

WIMP dark matter candidates and searches—current status and future prospects
journal, May 2018

Global fits of GUT-scale SUSY models with GAMBIT
text, January 2017

Case for an EeV Gravitino
journal, July 2017

Scenarios for Gluino Coannihilation
text, January 2015

Global fits of GUT-scale SUSY models with GAMBIT
text, January 2017

How Heavy can Neutralino Dark Matter be?
text, January 2018

Gluino coannihilation and observability of gluinos at LHC run II
journal, May 2016

Likelihood Analysis of the pMSSM11 in Light of LHC 13-TeV Data
text, January 2017

Whac-a-constraint with anomaly-free dark matter models
journal, January 2019

Global fits of GUT-scale SUSY models with GAMBIT
journal, December 2017

Likelihood analysis of the sub-GUT MSSM in light of LHC 13-TeV data
journal, February 2018

Coannihilation without chemical equilibrium
journal, November 2017

WIMP dark matter candidates and searches - current status and future prospects
text, January 2017

A minimal SU(5) SuperGUT in pure gravity mediation
journal, June 2019

A Very Heavy Sneutrino as Viable Thermal Dark Matter Candidate in $U(1)'$ Extensions of the MSSM
text, January 2017

Effects of QCD bound states on dark matter relic abundance
journal, February 2017

Top-philic dark matter within and beyond the WIMP paradigm
journal, April 2018

Coannihilation without chemical equilibrium
text, January 2017

Stop coannihilation in the CMSSM and SubGUT models
journal, May 2018

Producing a new Fermion in Coherent Elastic Neutrino-Nucleus Scattering: from Neutrino Mass to Dark Matter
text, January 2018

Producing a new fermion in coherent elastic neutrino-nucleus scattering: from neutrino mass to dark matter
journal, December 2018

A very heavy sneutrino as viable thermal dark matter candidate in U(1)′ extensions of the MSSM
journal, April 2019

Likelihood analysis of the pMSSM11 in light of LHC 13-TeV data
journal, March 2018

A Very Heavy Sneutrino as Viable Thermal Dark Matter Candidate in U (1) Extensions of the MSSM
text, January 2018

Top-philic dark matter within and beyond the WIMP paradigm
text, January 2018