Natural SUSY with a bino- or wino-like LSP

Baer, Howard; Barger, Vernon; Huang, Peisi; Mickelson, Dan; Padeffke-Kirkland, Maren; Tata, Xerxes

doi:10.1103/PhysRevD.91.075005

Title: Natural SUSY with a bino- or wino-like LSP

Abstract

In natural SUSY models higgsinos are always light because μ² cannot be much larger than M$$2\atop{Z}$$, while squarks and gluinos may be very heavy. Unless gluinos are discovered at LHC13, the commonly assumed unification of gaugino mass parameters will imply correspondingly heavy winos and binos, resulting in a higgsino-like LSP and small inter-higgsino mass splittings. The small visible energy release in higgsino decays makes their pair production difficult to detect at the LHC. Relaxing gaugino mass universality allows for relatively light winos and binos without violating LHC gluino mass bounds and without affecting naturalness. In the case where the bino mass M₁≲ μ, then one obtains a mixed bino-higgsino LSP with instead sizable w₁-z₁ and z₂-z₁ mass gaps. The thermal neutralino abundance can match the measured dark matter density in contrast to models with a higgsino-like LSP where WIMPs (weakly interacting massive particles) are underproduced by factors of 10-15. If instead M₂≲ μ, then one obtains a mixed wino-higgsino LSP with large z₂-z₁ but small w₁-z₁ mass gaps with still an under-abundance of thermally-produced WIMPs. Portions of the light wino parameter space may already be excluded by the IceCube upper bound on the spin-dependent neutralino-nucleon cross section. We discuss dark matter detection in other direct and indirect detection experiments and caution that the bounds from these must be interpreted with care. Finally, we show that LHC13 experiments should be able to probe these non-universal mass scenarios via a variety of channels including multi-lepton + E$$miss\atop{T}$$ events, WZ+ E$$miss\atop{T}$$ events, Wh+ E$$miss\atop{T}$$ events and W± W± + E$$miss\atop{T}$$ events from electroweak chargino and neutralino production.

Authors:

Baer, Howard ^[1]; Barger, Vernon ^[2]; Huang, Peisi ^[3]; Mickelson, Dan ^[4]; Padeffke-Kirkland, Maren ^[4]; Tata, Xerxes ^[5]

Univ. of Oklahoma, Norman, OK (United States); Univ. of Minnesota, Minneapolis, MN (United States)
Univ. of Wisconsin, Madison, WI (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States). Enrico Fermi Inst.
Univ. of Oklahoma, Norman, OK (United States)
Univ. of Hawaii, Honolulu, HI (United States)

Publication Date:: Wed Apr 08 00:00:00 EDT 2015

Research Org.:: Univ. of Hawaii, Honolulu, HI (United States)

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

OSTI Identifier:: 1598670

Alternate Identifier(s):: OSTI ID: 1179366

Grant/Contract Number:: SC0010504

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 91; Journal Issue: 7; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Baer, Howard, Barger, Vernon, Huang, Peisi, Mickelson, Dan, Padeffke-Kirkland, Maren, and Tata, Xerxes. Natural SUSY with a bino- or wino-like LSP.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevD.91.075005.

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                    Baer, Howard, Barger, Vernon, Huang, Peisi, Mickelson, Dan, Padeffke-Kirkland, Maren, & Tata, Xerxes. Natural SUSY with a bino- or wino-like LSP.  United States.  https://doi.org/10.1103/PhysRevD.91.075005

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                    Baer, Howard, Barger, Vernon, Huang, Peisi, Mickelson, Dan, Padeffke-Kirkland, Maren, and Tata, Xerxes. Wed .  
"Natural SUSY with a bino- or wino-like LSP".  United States.  https://doi.org/10.1103/PhysRevD.91.075005.  https://www.osti.gov/servlets/purl/1598670.

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@article{osti_1598670,

  title        = {Natural SUSY with a bino- or wino-like LSP},

  author       = {Baer, Howard and Barger, Vernon and Huang, Peisi and Mickelson, Dan and Padeffke-Kirkland, Maren and Tata, Xerxes},

  abstractNote = {In natural SUSY models higgsinos are always light because μ2 cannot be much larger than M$2\atop{Z}$, while squarks and gluinos may be very heavy. Unless gluinos are discovered at LHC13, the commonly assumed unification of gaugino mass parameters will imply correspondingly heavy winos and binos, resulting in a higgsino-like LSP and small inter-higgsino mass splittings. The small visible energy release in higgsino decays makes their pair production difficult to detect at the LHC. Relaxing gaugino mass universality allows for relatively light winos and binos without violating LHC gluino mass bounds and without affecting naturalness. In the case where the bino mass M1≲ μ, then one obtains a mixed bino-higgsino LSP with instead sizable w1-z1 and z2-z1 mass gaps. The thermal neutralino abundance can match the measured dark matter density in contrast to models with a higgsino-like LSP where WIMPs (weakly interacting massive particles) are underproduced by factors of 10-15. If instead M2≲ μ, then one obtains a mixed wino-higgsino LSP with large z2-z1 but small w1-z1 mass gaps with still an under-abundance of thermally-produced WIMPs. Portions of the light wino parameter space may already be excluded by the IceCube upper bound on the spin-dependent neutralino-nucleon cross section. We discuss dark matter detection in other direct and indirect detection experiments and caution that the bounds from these must be interpreted with care. Finally, we show that LHC13 experiments should be able to probe these non-universal mass scenarios via a variety of channels including multi-lepton + E$miss\atop{T}$ events, WZ+ E$miss\atop{T}$ events, Wh+ E$miss\atop{T}$ events and W± W± + E$miss\atop{T}$ events from electroweak chargino and neutralino production.},

  doi          = {10.1103/PhysRevD.91.075005},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 7,

  volume       = 91,

  place        = {United States},

  year         = {Wed Apr 08 00:00:00 EDT 2015},

  month        = {Wed Apr 08 00:00:00 EDT 2015}

}

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DOI: 10.1016/j.physrep.2014.10.002

Dark matter constraints from observations of 25 Milky Way satellite galaxies with the Fermi Large Area Telescope
journal, February 2014

Ackermann, M.; Albert, A.; Anderson, B.
Physical Review D, Vol. 89, Issue 4
DOI: 10.1103/PhysRevD.89.042001

Trilepton signal of minimal supergravity at the Tevatron including τ-lepton contributions
journal, August 1998

Barger, V.; Kao, Chung; Li, Tianjun
Physics Letters B, Vol. 433, Issue 3-4
DOI: 10.1016/S0370-2693(98)00705-9

Trileptons from chargino-neutralino production at the CERN Large Hadron Collider
journal, October 1994

Baer, Howard; Chen, Chih-hao; Paige, Frank
Physical Review D, Vol. 50, Issue 7
DOI: 10.1103/PhysRevD.50.4508

Wino cold dark matter from anomaly mediated SUSY breaking
journal, March 2000

Moroi, Takeo; Randall, Lisa
Nuclear Physics B, Vol. 570, Issue 1-2
DOI: 10.1016/S0550-3213(99)00748-8

Works referencing / citing this record:

Prospects for Higgs coupling measurements in SUSY with radiatively-driven naturalness
text, January 2015

Bae, Kyu Jung; Baer, Howard; Nagata, Natsumi
arXiv
DOI: 10.48550/arxiv.1505.03541

Towards the Final Word on Neutralino Dark Matter
text, January 2015

Bramante, Joseph; Desai, Nishita; Fox, Patrick
arXiv
DOI: 10.48550/arxiv.1510.03460

Multi-channel assault on natural supersymmetry at the high luminosity LHC
text, January 2016

Baer, Howard; Barger, Vernon; Savoy, Michael
arXiv
DOI: 10.48550/arxiv.1604.07438

Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC
text, January 2017

Baer, Howard; Barger, Vernon; Gainer, James S.
arXiv
DOI: 10.48550/arxiv.1710.09103

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Title: Natural SUSY with a bino- or wino-like LSP

Abstract

Citation Formats

Search for Dark Matter Annihilations in the Sun with the 79-String IceCube Detector journal, March 2013

Gauginos as a signal for supersymmetry at pp¯ colliders journal, March 1987

Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at $ \sqrt{s} $ = 8 TeV journal, June 2014

Blind spots for neutralino dark matter in the MSSM with an intermediate m A journal, July 2014

Observables in Low-Energy Superstring Models journal, April 1986

Naturalness implies intra-generational degeneracy for decoupled squarks and sleptons journal, February 2014

Physics at a Higgsino factory journal, June 2014

Successful supersymmetric dark matter with thermal over/under-abundance from late decay of a visible sector scalar journal, April 2013

Multilepton signals from W± and Z0 decays to gauginos at p colliders journal, May 1985

Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using s = 8 $$ \sqrt{s}=8 $$ TeV proton-proton collision data journal, September 2014

Upper bounds on supersymmetric particle masses journal, August 1988

Measurement of the B ¯ → X s γ branching fraction with a sum of exclusive decays journal, March 2015

WZ plus missing-E T signal from gaugino pair production at LHC7 journal, March 2012

Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV journal, September 2014

Nonthermal “WIMP miracle” journal, October 2009

Supersymmetry, naturalness and light higgsinos journal, May 2014

New backgrounds in trilepton, dilepton and dilepton plus tau jet SUSY signals at the tevatron journal, November 1999

Exploring the BWCA (Bino-Wino co-annihilation) scenario for neutralino dark matter journal, December 2005

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC journal, September 2012

Supersymmetry, naturalness, and signatures at the CERN LHC journal, May 2006

Problem of Strong P and T Invariance in the Presence of Instantons journal, January 1978

Electroweakinos in the light of the Higgs boson journal, December 2013

A simple solution to the strong CP problem with a harmless axion journal, August 1981

Future Imperfect journal, February 2014

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC journal, September 2012

Electroweakino constraints from LHC data journal, December 2014

Direct and indirect detection of higgsino-like WIMPs: Concluding the story of electroweak naturalness journal, October 2013

Analysis of the neutralino system in supersymmetric theories journal, December 2001

Monojets and monophotons from light Higgsino pair production at LHC14 journal, March 2014

Natural little hierarchy for SUSY from radiative breaking of the Peccei-Quinn symmetry journal, January 2015

Estimate of B ( B ¯ → X s γ ) at O ( α s 2 ) journal, January 2007

Nonuniversal gaugino masses and seminatural supersymmetry in view of the Higgs boson discovery journal, February 2014

Phenomenological consequences of supersymmetry with anomaly induced masses journal, October 1999

Radiatively-driven natural supersymmetry at the LHC journal, December 2013

Weak Scale Supersymmetry book, January 2006

Direct detection of dark matter in supersymmetric models journal, September 2003

Monojet plus soft dilepton signal from light higgsino pair production at LHC14 journal, December 2014

Naturalness, weak scale supersymmetry, and the prospect for the observation of supersymmetry at the Fermilab Tevatron and at the CERN LHC journal, September 1998

CP Conservation in the Presence of Pseudoparticles journal, June 1977

Experimental signals for supersymmetric decays of the W and Z boxons journal, October 1983

Probing charginos and neutralinos beyond the reach of the CERN e + e − collider LEP at the Fermilab Tevatron collider journal, April 1993

Reconstructing the chargino system at $e^+e^-$ linear colliders journal, June 2000

Supersymmetric Signals at the Tevatron journal, May 1987

Precision study of supersymmetry at future linear e + e − colliders journal, April 1995

First Results from the LUX Dark Matter Experiment at the Sanford Underground Research Facility journal, March 2014

Radiative natural supersymmetry: Reconciling electroweak fine-tuning and the Higgs boson mass journal, June 2013

Mainly axion cold dark matter from natural supersymmetry journal, February 2014

How conventional measures overestimate electroweak fine-tuning in supersymmetric theory journal, November 2013

Neutralino dark matter from heavy axino decay journal, June 2008

Hunting quasidegenerate Higgsinos journal, April 2014

Stability of flux compactifications and the pattern of supersymmetry breaking journal, November 2004

Mixed axion/neutralino cold dark matter in supersymmetric models journal, June 2011

Nonuniversal Gaugino Masses and Natural Supersymmetry journal, May 2013

Signals for minimal supergravity at the CERN Large Hadron Collider. II. Multilepton channels journal, June 1996

Aspects of chargino-neutralino production at the Fermilab Tevatron collider journal, December 1993

Soft breaking of supersymmetry journal, January 1982

Trilepton signature of minimal supergravity at the upgraded Fermilab Tevatron journal, November 1999

Trilepton signal for supersymmetry at the Fermilab Tevatron reexamined journal, April 2000

Prospects and blind spots for neutralino dark matter journal, May 2013

Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses journal, April 2000

Radiative Natural Supersymmetry with a 125 GeV Higgs Boson journal, October 2012

Production and leptonic decays of charginos and neutralinos in hadronic collisions journal, December 1991

SUSY models under siege: LHC constraints and electroweak fine-tuning journal, June 2014

Model independent approach to focus point supersymmetry: from dark matter to collider searches journal, October 2005

Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at $ \sqrt{s} $ = 8TeV with the ATLAS detector journal, May 2014

W h plus missing- E T signature from gaugino pair production at the LHC journal, March 2012

Nonuniversal gaugino and scalar masses, hadronically quiet trileptons, and the Large Hadron Collider journal, December 2008

Supersymmetry studies at future linear e + e − colliders journal, December 1996

Addressing the multi-channel inverse problem at high energy colliders: a model-independent approach to the search for new physics with trileptons journal, June 2012

Gaugino masses and grand unification journal, June 1985

Same-Sign Diboson Signature from Supersymmetry Models with Light Higgsinos at the LHC journal, April 2013

Trilepton signal of grand unified models at the Tevatron journal, February 2000

Exclusive measurements of b → s γ transition rate and photon energy spectrum journal, September 2012

Phenomenological consequences of N = 1 supergravity theories with non-minimal kinetic energy terms for vector superfields journal, August 1985

Probing Dark Matter at the LHC Using Vector Boson Fusion Processes journal, August 2013

Supersymmetry dileptons and trileptons at the Fermilab Tevatron journal, July 1995

Tackling light higgsinos at the ILC journal, December 2013

Search for Dark Matter Annihilations in the Sun with the 79-String IceCube Detector
journal, March 2013

Gauginos as a signal for supersymmetry at pp¯ colliders
journal, March 1987

Search for new physics in the multijet and missing transverse momentum final state in proton-proton collisions at $ \sqrt{s} $ = 8 TeV
journal, June 2014

Blind spots for neutralino dark matter in the MSSM with an intermediate $m_{A}$
journal, July 2014

Observables in Low-Energy Superstring Models
journal, April 1986

Naturalness implies intra-generational degeneracy for decoupled squarks and sleptons
journal, February 2014

Physics at a Higgsino factory
journal, June 2014

Successful supersymmetric dark matter with thermal over/under-abundance from late decay of a visible sector scalar
journal, April 2013

Multilepton signals from W± and Z0 decays to gauginos at p colliders
journal, May 1985

Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using s = 8 $$ \sqrt{s}=8 $$ TeV proton-proton collision data
journal, September 2014

Upper bounds on supersymmetric particle masses
journal, August 1988

Measurement of the $\bar{B} \to X_{s} γ$ branching fraction with a sum of exclusive decays
journal, March 2015

WZ plus missing-E T signal from gaugino pair production at LHC7
journal, March 2012

Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV
journal, September 2014

Nonthermal “WIMP miracle”
journal, October 2009

Supersymmetry, naturalness and light higgsinos
journal, May 2014

New backgrounds in trilepton, dilepton and dilepton plus tau jet SUSY signals at the tevatron
journal, November 1999

Exploring the BWCA (Bino-Wino co-annihilation) scenario for neutralino dark matter
journal, December 2005

Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
journal, September 2012

Supersymmetry, naturalness, and signatures at the CERN LHC
journal, May 2006

Problem of Strong $P$ and $T$ Invariance in the Presence of Instantons
journal, January 1978

Electroweakinos in the light of the Higgs boson
journal, December 2013

A simple solution to the strong CP problem with a harmless axion
journal, August 1981

Future Imperfect
journal, February 2014

Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
journal, September 2012

Electroweakino constraints from LHC data
journal, December 2014

Direct and indirect detection of higgsino-like WIMPs: Concluding the story of electroweak naturalness
journal, October 2013

Analysis of the neutralino system in supersymmetric theories
journal, December 2001

Monojets and monophotons from light Higgsino pair production at LHC14
journal, March 2014

Natural little hierarchy for SUSY from radiative breaking of the Peccei-Quinn symmetry
journal, January 2015

Estimate of $B (\bar{B} \to X_{s} γ)$ at $O (α_{s}^{2})$
journal, January 2007

Nonuniversal gaugino masses and seminatural supersymmetry in view of the Higgs boson discovery
journal, February 2014

Phenomenological consequences of supersymmetry with anomaly induced masses
journal, October 1999

Radiatively-driven natural supersymmetry at the LHC
journal, December 2013

Weak Scale Supersymmetry
book, January 2006

Direct detection of dark matter in supersymmetric models
journal, September 2003

Monojet plus soft dilepton signal from light higgsino pair production at LHC14
journal, December 2014

Naturalness, weak scale supersymmetry, and the prospect for the observation of supersymmetry at the Fermilab Tevatron and at the CERN LHC
journal, September 1998

$CP$ Conservation in the Presence of Pseudoparticles
journal, June 1977

Experimental signals for supersymmetric decays of the W and Z boxons
journal, October 1983

Probing charginos and neutralinos beyond the reach of the CERN $e^{+} e^{-}$ collider LEP at the Fermilab Tevatron collider
journal, April 1993

Reconstructing the chargino system at $e^+e^-$ linear colliders
journal, June 2000

Supersymmetric Signals at the Tevatron
journal, May 1987

Precision study of supersymmetry at future linear $e^{+}$ $e^{-}$ colliders
journal, April 1995

First Results from the LUX Dark Matter Experiment at the Sanford Underground Research Facility
journal, March 2014

Radiative natural supersymmetry: Reconciling electroweak fine-tuning and the Higgs boson mass
journal, June 2013

Mainly axion cold dark matter from natural supersymmetry
journal, February 2014

How conventional measures overestimate electroweak fine-tuning in supersymmetric theory
journal, November 2013

Neutralino dark matter from heavy axino decay
journal, June 2008

Hunting quasidegenerate Higgsinos
journal, April 2014

Stability of flux compactifications and the pattern of supersymmetry breaking
journal, November 2004

Mixed axion/neutralino cold dark matter in supersymmetric models
journal, June 2011

Nonuniversal Gaugino Masses and Natural Supersymmetry
journal, May 2013

Signals for minimal supergravity at the CERN Large Hadron Collider. II. Multilepton channels
journal, June 1996

Aspects of chargino-neutralino production at the Fermilab Tevatron collider
journal, December 1993

Soft breaking of supersymmetry
journal, January 1982

Trilepton signature of minimal supergravity at the upgraded Fermilab Tevatron
journal, November 1999

Trilepton signal for supersymmetry at the Fermilab Tevatron reexamined
journal, April 2000

Prospects and blind spots for neutralino dark matter
journal, May 2013

Reach of Fermilab Tevatron upgrades for SU(5) supergravity models with nonuniversal gaugino masses
journal, April 2000

Radiative Natural Supersymmetry with a 125 GeV Higgs Boson
journal, October 2012

Production and leptonic decays of charginos and neutralinos in hadronic collisions
journal, December 1991

SUSY models under siege: LHC constraints and electroweak fine-tuning
journal, June 2014

Model independent approach to focus point supersymmetry: from dark matter to collider searches
journal, October 2005

Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at $ \sqrt{s} $ = 8TeV with the ATLAS detector
journal, May 2014

$W h$ plus missing- $E_{T}$ signature from gaugino pair production at the LHC
journal, March 2012

Nonuniversal gaugino and scalar masses, hadronically quiet trileptons, and the Large Hadron Collider
journal, December 2008

Supersymmetry studies at future linear $e^{+} e^{-}$ colliders
journal, December 1996

Addressing the multi-channel inverse problem at high energy colliders: a model-independent approach to the search for new physics with trileptons
journal, June 2012

Gaugino masses and grand unification
journal, June 1985

Same-Sign Diboson Signature from Supersymmetry Models with Light Higgsinos at the LHC
journal, April 2013

Trilepton signal of grand unified models at the Tevatron
journal, February 2000

Exclusive measurements of $b \to s γ$ transition rate and photon energy spectrum
journal, September 2012

Phenomenological consequences of N = 1 supergravity theories with non-minimal kinetic energy terms for vector superfields
journal, August 1985

Probing Dark Matter at the LHC Using Vector Boson Fusion Processes
journal, August 2013

Supersymmetry dileptons and trileptons at the Fermilab Tevatron
journal, July 1995

Tackling light higgsinos at the ILC
journal, December 2013

Neutralino relic density in minimal supergravity with co-annihilations
journal, March 2002

Dark Matter Results from 225 Live Days of XENON100 Data
journal, November 2012

W decay in supergravity guts
journal, October 1983