Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos

Baer, Howard; Barger, Vernon; Gainer, James S.; Serce, Hasan; Tata, Xerxes

doi:10.1103/PhysRevD.96.115008

Title: Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos

Abstract

We investigate the top squark (stop) and gluino reach of the proposed 33 TeV energy upgrade of the Large Hadron Collider (LHC33) in the Minimal Supersymmetric Standard Model (MSSM) with light Higgsinos and relatively heavy electroweak gauginos. In our analysis, we assume that stops decay to Higgsinos via ${\tilde{t}}_{1} \to t {\tilde{Z}}_{1}$ , ${\tilde{t}}_{1} \to t {\tilde{Z}}_{2}$ , and ${\tilde{t}}_{1} \to b {\tilde{W}}_{1}$ with branching fractions in the ratio $1 : 1 : 2$ (expected if the decay occurs dominantly via the superpotential Yukawa coupling), while gluinos decay via $\tilde{g} \to t {\tilde{t}}_{1}$ or via three-body decays to third-generation quarks plus Higgsinos. These decay patterns are motivated by models of natural supersymmetry where Higgsinos are expected to be close in mass to $m_{Z}$ , but gluinos may be as heavy as 5–6 TeV, and stops may have masses up to $~ 3 TeV$ . We devise cuts to optimize the signals from stop and gluino pair production at LHC33. We find that experiments at LHC33 should be able to discover stops with $> 5 σ$ significance if $m_{{\tilde{t}}_{1}} < 2.3$ (2.8) [3.2] TeV for an integrated luminosity of 0.3 (1) $[3] {ab}^{- 1}$ . The corresponding reach for gluinos extends to 5 (5.5) [6] TeV. These findings imply that experiments at LHC33 should be able to discover at least one of the stop or gluino pair signals even with an integrated luminosity of $0.3 {ab}^{- 1}$ for natural supersymmetry models with no worse than 3% electroweak fine-tuning and quite likely both gluinos and stops for an integrated luminosity of $3 {ab}^{- 1}$ .

Authors:

Baer, Howard ^[1]; Barger, Vernon ^[2]; Gainer, James S. ^[3]; Serce, Hasan ^[1]; Tata, Xerxes ^[3]

Univ. of Oklahoma, Norman, OK (United States)
Univ. of Wisconsin, Madison, WI (United States)
Univ. of Hawaii, Honolulu, HI (United States). Dept. of Physics and Astronomy

Publication Date:: Thu Dec 14 00:00:00 EST 2017

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

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

OSTI Identifier:: 1598616

Alternate Identifier(s):: OSTI ID: 1413371

Grant/Contract Number:: SC0010504; PHY-1607611

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review D

Additional Journal Information:: Journal Volume: 96; Journal Issue: 11; 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

Citation Formats


                    Baer, Howard, Barger, Vernon, Gainer, James S., Serce, Hasan, and Tata, Xerxes. Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevD.96.115008.

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                    Baer, Howard, Barger, Vernon, Gainer, James S., Serce, Hasan, & Tata, Xerxes. Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos.  United States.  https://doi.org/10.1103/PhysRevD.96.115008

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                    Baer, Howard, Barger, Vernon, Gainer, James S., Serce, Hasan, and Tata, Xerxes. Thu .  
"Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos".  United States.  https://doi.org/10.1103/PhysRevD.96.115008.  https://www.osti.gov/servlets/purl/1598616.

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@article{osti_1598616,

  title        = {Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos},

  author       = {Baer, Howard and Barger, Vernon and Gainer, James S. and Serce, Hasan and Tata, Xerxes},

  abstractNote = {We investigate the top squark (stop) and gluino reach of the proposed 33 TeV energy upgrade of the Large Hadron Collider (LHC33) in the Minimal Supersymmetric Standard Model (MSSM) with light Higgsinos and relatively heavy electroweak gauginos. In our analysis, we assume that stops decay to Higgsinos via t˜1→tZ˜1, t˜1→tZ˜2, and t˜1→bW˜1 with branching fractions in the ratio 1:1:2 (expected if the decay occurs dominantly via the superpotential Yukawa coupling), while gluinos decay via g˜→tt˜1 or via three-body decays to third-generation quarks plus Higgsinos. These decay patterns are motivated by models of natural supersymmetry where Higgsinos are expected to be close in mass to mZ, but gluinos may be as heavy as 5–6 TeV, and stops may have masses up to ~3TeV. We devise cuts to optimize the signals from stop and gluino pair production at LHC33. We find that experiments at LHC33 should be able to discover stops with >5σ significance if mt˜1<2.3 (2.8) [3.2] TeV for an integrated luminosity of 0.3 (1) [3]ab-1. The corresponding reach for gluinos extends to 5 (5.5) [6] TeV. These findings imply that experiments at LHC33 should be able to discover at least one of the stop or gluino pair signals even with an integrated luminosity of 0.3ab-1 for natural supersymmetry models with no worse than 3% electroweak fine-tuning and quite likely both gluinos and stops for an integrated luminosity of 3ab-1.},

  doi          = {10.1103/PhysRevD.96.115008},

  journal      = {Physical Review D},

  number       = 11,

  volume       = 96,

  place        = {United States},

  year         = {Thu Dec 14 00:00:00 EST 2017},

  month        = {Thu Dec 14 00:00:00 EST 2017}

}

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HE-LHC: The High-Energy Large Hadron Collider
text, January 2019

Abada, A.; Abbrescia, M.; AbdusSalam, S. S.
Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2019-02864

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

LHC luminosity and energy upgrades confront natural supersymmetry models
text, January 2018

Baer, Howard; Barger, Vernon; Gainer, James S.
arXiv
DOI: 10.48550/arxiv.1808.04844

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Title: Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos

Abstract

Citation Formats

Implications of non-universality of soft terms in supersyrnmetric grand unified theories journal, February 1995

Supersymmetric Higgs and radiative electroweak breaking journal, November 2007

The heterotic MiniLandscape and the 126 GeV Higgs boson journal, March 2013

The anti- k t jet clustering algorithm journal, April 2008

Observables in Low-Energy Superstring Models journal, April 1986

On the MSSM Higgsino mass and fine tuning journal, August 2016

The heterotic string yields natural supersymmetry journal, May 2012

Higgs Boson theory and phenomenology journal, January 2003

Physics at a Higgsino factory journal, June 2014

Next-To-Leading Order QCD Corrections to p p → t t ¯ b b ¯ + X at the LHC journal, July 2009

Renormalization of Supersymmetry Breaking Parameters Revisited journal, February 1984

Radiative corrections to the masses of supersymmetric Higgs bosons journal, March 1991

MadGraph 5: going beyond journal, June 2011

Weak symmetry breaking by radiative corrections in broken supergravity journal, June 1983

Generalized focus point and mass spectra comparison of highly natural SUGRA GUT models journal, April 2016

HATHOR – HAdronic Top and Heavy quarks crOss section calculatoR journal, April 2011

Upper bounds on supersymmetric particle masses journal, August 1988

Electroweak symmetry breaking with non-universal scalar soft terms and large tan β solutions journal, January 1995

Natural supersymmetry without light Higgsinos journal, April 2015

Locally supersymmetric SU(5) grand unification journal, December 1982

Gluino reach and mass extraction at the LHC in radiatively-driven natural SUSY journal, July 2017

Perspectives on Higgs Physics II book, November 1997

Supersymmetry, naturalness and light higgsinos journal, May 2014

Compressed electroweakino spectra at the LHC journal, March 2014

Metastable vacua in flux compactifications and their phenomenology journal, February 2007

SU(2)L × U(1) symmetry breaking as a radiative effect of supersymmetry breaking in GUTs journal, April 1982

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

Gauge hierarchy in a supersymmetric model journal, February 1982

Squark and gluino production cross sections in $$pp$$ p p collisions at $$\sqrt{s} = 13, 14, 33$$ s = 13 , 14 , 33 and $$100$$ 100 TeV journal, December 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

Natural supersymmetry: LHC, dark matter and ILC searches journal, May 2012

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations journal, July 2014

FastJet user manual: (for version 3.0.2) journal, March 2012

Phenomenological Hints from a Class of String Motivated Model Constructions journal, January 2015

Moduli stabilization, F -term uplifting, and soft supersymmetry breaking terms journal, January 2007

Can the mass of the lightest Higgs boson of the minimal supersymmetric model be larger than m Z ? journal, April 1991

Direct, indirect and collider detection of neutralino dark matter in SUSY models with non-universal Higgs masses journal, July 2005

SUSY simplified models at 14, 33, and 100 TeV proton colliders journal, April 2014

Soft supersymmetry breaking in KKLT flux compactification journal, July 2005

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

Nonuniversal soft supersymmetry breaking and dark matter journal, September 1997

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

Constraining BSM physics at the LHC: four top final states with NLO accuracy in perturbative QCD journal, July 2012

de Sitter vacua in string theory journal, August 2003

HatHor for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions journal, June 2015

Dynamical breaking of supersymmetry journal, October 1981

Weak interaction breakdown induced by supergravity journal, January 1983

Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC journal, April 2015

Implications of precision electroweak experiments for m t , ρ 0 , sin 2 θ W , and grand unification journal, August 1991

Nonstandard supersymmetry breaking and Dirac gaugino masses without supersoftness journal, August 2015

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

Minimal low-energy supergravity journal, July 1983

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

W - and Z -boson production with a massive bottom-quark pair at the Large Hadron Collider journal, August 2009

Hunting quasidegenerate Higgsinos journal, April 2014

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

A brief introduction to PYTHIA 8.1 journal, June 2008

The gaugino code journal, April 2007

NLO QCD corrections to $$ {\text{t}}\overline {\text{t}} {\text{b}}\overline {\text{b}} $$ production at the LHC: 2. Full hadronic results journal, March 2010

Supersymmetry and the scale of unification journal, September 1981

Probing the desert using gauge coupling unification journal, May 1991

The locally supersymmetric geometrical hierarchy model journal, October 1983

Soft breaking of supersymmetry journal, January 1982

Aspects of Grand Unified Models with Softly Broken Supersymmetry journal, September 1982

DELPHES 3: a modular framework for fast simulation of a generic collider experiment journal, February 2014

Exploration of the MSSM with non-universal Higgs masses journal, March 2003

Generalized Supersoft Supersymmetry Breaking and a Solution to the μ Problem journal, May 2015

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

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

Moduli stabilization and uplifting with dynamically generated F-terms journal, February 2007

Upper bounds on sparticle masses from naturalness or how to disprove weak scale supersymmetry journal, February 2016

Multichannel search for minimal supergravity at pp¯ and e + e − colliders journal, February 1995

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

Large-volume flux compactifications: moduli spectrum and D3/D7 soft supersymmetry breaking journal, August 2005

Comparison of grand unified theories with electroweak and strong coupling constants measured at LEP journal, May 1991

Natural generalized mirage mediation journal, December 2016

Heavy-flavor tagging and the supersymmetry reach of the CERN Large Hadron Collider journal, August 2008

Implications of non-universality of soft terms in supersyrnmetric grand unified theories
journal, February 1995

Supersymmetric Higgs and radiative electroweak breaking
journal, November 2007

The heterotic MiniLandscape and the 126 GeV Higgs boson
journal, March 2013

The anti- k _t jet clustering algorithm
journal, April 2008

Observables in Low-Energy Superstring Models
journal, April 1986

On the MSSM Higgsino mass and fine tuning
journal, August 2016

The heterotic string yields natural supersymmetry
journal, May 2012

Higgs Boson theory and phenomenology
journal, January 2003

Physics at a Higgsino factory
journal, June 2014

Next-To-Leading Order QCD Corrections to $p p \to t \bar{t} b \bar{b} + X$ at the LHC
journal, July 2009

Renormalization of Supersymmetry Breaking Parameters Revisited
journal, February 1984

Radiative corrections to the masses of supersymmetric Higgs bosons
journal, March 1991

MadGraph 5: going beyond
journal, June 2011

Weak symmetry breaking by radiative corrections in broken supergravity
journal, June 1983

Generalized focus point and mass spectra comparison of highly natural SUGRA GUT models
journal, April 2016

HATHOR – HAdronic Top and Heavy quarks crOss section calculatoR
journal, April 2011

Upper bounds on supersymmetric particle masses
journal, August 1988

Electroweak symmetry breaking with non-universal scalar soft terms and large tan β solutions
journal, January 1995

Natural supersymmetry without light Higgsinos
journal, April 2015

Locally supersymmetric SU(5) grand unification
journal, December 1982

Gluino reach and mass extraction at the LHC in radiatively-driven natural SUSY
journal, July 2017

Perspectives on Higgs Physics II
book, November 1997

Supersymmetry, naturalness and light higgsinos
journal, May 2014

Compressed electroweakino spectra at the LHC
journal, March 2014

Metastable vacua in flux compactifications and their phenomenology
journal, February 2007

SU(2)L × U(1) symmetry breaking as a radiative effect of supersymmetry breaking in GUTs
journal, April 1982

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

Gauge hierarchy in a supersymmetric model
journal, February 1982

Squark and gluino production cross sections in $$pp$$ p p collisions at $$\sqrt{s} = 13, 14, 33$$ s = 13 , 14 , 33 and $$100$$ 100 TeV
journal, December 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

Natural supersymmetry: LHC, dark matter and ILC searches
journal, May 2012

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

FastJet user manual: (for version 3.0.2)
journal, March 2012

Phenomenological Hints from a Class of String Motivated Model Constructions
journal, January 2015

Moduli stabilization, $F$ -term uplifting, and soft supersymmetry breaking terms
journal, January 2007

Can the mass of the lightest Higgs boson of the minimal supersymmetric model be larger than $m_{Z}$ ?
journal, April 1991

Direct, indirect and collider detection of neutralino dark matter in SUSY models with non-universal Higgs masses
journal, July 2005

SUSY simplified models at 14, 33, and 100 TeV proton colliders
journal, April 2014

Soft supersymmetry breaking in KKLT flux compactification
journal, July 2005

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

Nonuniversal soft supersymmetry breaking and dark matter
journal, September 1997

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

Constraining BSM physics at the LHC: four top final states with NLO accuracy in perturbative QCD
journal, July 2012

de Sitter vacua in string theory
journal, August 2003

HatHor for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions
journal, June 2015

Dynamical breaking of supersymmetry
journal, October 1981

Weak interaction breakdown induced by supergravity
journal, January 1983

Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
journal, April 2015

Implications of precision electroweak experiments for $m_{t}$ , $ρ_{0}$ , ${{sin}^{2} θ}_{W}$ , and grand unification
journal, August 1991

Nonstandard supersymmetry breaking and Dirac gaugino masses without supersoftness
journal, August 2015

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

Minimal low-energy supergravity
journal, July 1983

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

$W$ - and $Z$ -boson production with a massive bottom-quark pair at the Large Hadron Collider
journal, August 2009

Hunting quasidegenerate Higgsinos
journal, April 2014

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

A brief introduction to PYTHIA 8.1
journal, June 2008

The gaugino code
journal, April 2007

NLO QCD corrections to $$ {\text{t}}\overline {\text{t}} {\text{b}}\overline {\text{b}} $$ production at the LHC: 2. Full hadronic results
journal, March 2010

Supersymmetry and the scale of unification
journal, September 1981

Probing the desert using gauge coupling unification
journal, May 1991

The locally supersymmetric geometrical hierarchy model
journal, October 1983

Soft breaking of supersymmetry
journal, January 1982

Aspects of Grand Unified Models with Softly Broken Supersymmetry
journal, September 1982

DELPHES 3: a modular framework for fast simulation of a generic collider experiment
journal, February 2014

Exploration of the MSSM with non-universal Higgs masses
journal, March 2003

Generalized Supersoft Supersymmetry Breaking and a Solution to the $μ$ Problem
journal, May 2015

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

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

Moduli stabilization and uplifting with dynamically generated F-terms
journal, February 2007

Upper bounds on sparticle masses from naturalness or how to disprove weak scale supersymmetry
journal, February 2016

Multichannel search for minimal supergravity at pp¯ and $e^{+}$ $e^{-}$ colliders
journal, February 1995

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

Large-volume flux compactifications: moduli spectrum and D3/D7 soft supersymmetry breaking
journal, August 2005

Comparison of grand unified theories with electroweak and strong coupling constants measured at LEP
journal, May 1991

Natural generalized mirage mediation
journal, December 2016

Heavy-flavor tagging and the supersymmetry reach of the CERN Large Hadron Collider
journal, August 2008

Pileup subtraction using jet areas
journal, January 2008

What hadron collider is required to discover or falsify natural supersymmetry?
journal, November 2017

Superparticle phenomenology from the natural mini-landscape
journal, June 2017