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

Baer, Howard; Barger, Vernon; Gainer, James S.; Savoy, Michael; Sengupta, Dibyashree; Tata, Xerxes

doi:10.1103/PhysRevD.97.035012

Title: Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC

Abstract

Naturalness arguments applied to simple supersymmetric (SUSY) theories require a set of light higgsinos with mass $~ | μ |$ not too far from $m_{h}$ . These models have an inverted electroweakino spectrum with $| μ | ≪ M_{2}$ which leads to a rather clean, hadronically quiet, same-sign diboson (SSdB) signature at hadron colliders arising from neutral-plus-charged wino pair production. We improve and expand our earlier studies of this signature for discovering SUSY in natural SUSY models by (i) including backgrounds which were not previously considered and which turn out to be significant, (ii) devising more efficient cuts to successfully contend with these larger backgrounds and determining the discovery reach and exclusion ranges for winos with these cuts, emphasizing projections for the updated integrated luminosity target for HL-LHC of $3 {ab}^{- 1}$ , and (iii) emphasizing the utility of this channel for natural models without gaugino mass unification. We display the kinematic characteristics of the relatively jet-free same sign $dilepton + E_{T}$ events (from leptonic decays of both $W s$ ) and find that these are only weakly sensitive to the parent wino mass. We also examine the charge asymmetry in these events and show that its measurement can be used to check the consistency of the wino origin of the signal. Finally, we show that—because the wino branching fractions in natural SUSY are essentially independent of details of the underlying model—a determination of the rate for clean, same-sign dilepton events yields a better than 10% determination of the wino mass over the entire mass range where experiments at the HL-LHC can discover the wino signal.

Authors:: Baer, Howard; Barger, Vernon; Gainer, James S.; Savoy, Michael; Sengupta, Dibyashree; Tata, Xerxes

Publication Date:: Fri Feb 23 00:00:00 EST 2018

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:: 1422436

Alternate Identifier(s):: OSTI ID: 1597950

Grant/Contract Number:: SC0010504; PHY-1607611

Resource Type:: Published Article

Journal Name:: Physical Review. D.

Additional Journal Information:: Journal Name: Physical Review. D. Journal Volume: 97 Journal Issue: 3; 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., Savoy, Michael, Sengupta, Dibyashree, and Tata, Xerxes. Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC.  United States: N. p., 2018. 
Web.  doi:10.1103/PhysRevD.97.035012.

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                    Baer, Howard, Barger, Vernon, Gainer, James S., Savoy, Michael, Sengupta, Dibyashree, & Tata, Xerxes. Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC.  United States.  https://doi.org/10.1103/PhysRevD.97.035012

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                    Baer, Howard, Barger, Vernon, Gainer, James S., Savoy, Michael, Sengupta, Dibyashree, and Tata, Xerxes. Fri .  
"Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC".  United States.  https://doi.org/10.1103/PhysRevD.97.035012.

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@article{osti_1422436,

  title        = {Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC},

  author       = {Baer, Howard and Barger, Vernon and Gainer, James S. and Savoy, Michael and Sengupta, Dibyashree and Tata, Xerxes},

  abstractNote = {Naturalness arguments applied to simple supersymmetric (SUSY) theories require a set of light higgsinos with mass ~|μ| not too far from mh. These models have an inverted electroweakino spectrum with |μ|≪M2 which leads to a rather clean, hadronically quiet, same-sign diboson (SSdB) signature at hadron colliders arising from neutral-plus-charged wino pair production. We improve and expand our earlier studies of this signature for discovering SUSY in natural SUSY models by (i) including backgrounds which were not previously considered and which turn out to be significant, (ii) devising more efficient cuts to successfully contend with these larger backgrounds and determining the discovery reach and exclusion ranges for winos with these cuts, emphasizing projections for the updated integrated luminosity target for HL-LHC of 3ab-1, and (iii) emphasizing the utility of this channel for natural models without gaugino mass unification. We display the kinematic characteristics of the relatively jet-free same sign dilepton+ET events (from leptonic decays of both Ws) and find that these are only weakly sensitive to the parent wino mass. We also examine the charge asymmetry in these events and show that its measurement can be used to check the consistency of the wino origin of the signal. Finally, we show that—because the wino branching fractions in natural SUSY are essentially independent of details of the underlying model—a determination of the rate for clean, same-sign dilepton events yields a better than 10% determination of the wino mass over the entire mass range where experiments at the HL-LHC can discover the wino signal.},

  doi          = {10.1103/PhysRevD.97.035012},

  journal      = {Physical Review. D.},

  number       = 3,

  volume       = 97,

  place        = {United States},

  year         = {Fri Feb 23 00:00:00 EST 2018},

  month        = {Fri Feb 23 00:00:00 EST 2018}

}

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Title: Aspects of the same-sign diboson signature from wino pair production with light higgsinos at the high luminosity LHC

Abstract

Citation Formats

Vector boson pair production at the LHC journal, July 2011

Multichannel assault on natural supersymmetry at the high luminosity LHC journal, August 2016

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

Gluino-cascade-decay signatures at the Fermilab Tevatron collider journal, February 1990

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

Observables in Low-Energy Superstring Models journal, April 1986

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

Physics at a Higgsino factory journal, June 2014

MadGraph 5: going beyond journal, June 2011

Upper bounds on supersymmetric particle masses journal, August 1988

A variable for measuring masses at hadron colliders when missing energy is expected; m T 2 : the truth behind the glamour journal, September 2003

Natural supersymmetry without light Higgsinos journal, April 2015

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

Natural SUSY with a bino- or wino-like LSP journal, April 2015

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

LHC signature of the minimal SUGRA model with a large soft scalar mass journal, November 2000

Supersymmetry, naturalness and light higgsinos journal, May 2014

Compressed electroweakino spectra at the LHC journal, March 2014

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

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

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

Distinguishing LSP archetypes via gluino pair production at LHC13 journal, August 2015

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

Measuring masses of semi-invisibly decaying particle pairs produced at hadron colliders journal, September 1999

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

Nonuniversal soft supersymmetry breaking and dark matter journal, September 1997

Weak Scale Supersymmetry book, January 2006

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

Constraints imposed by CP conservation in the presence of pseudoparticles journal, September 1977

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

Erratum to: Radiatively-driven natural supersymmetry at the LHC journal, June 2015

CP Conservation in the Presence of Pseudoparticles journal, June 1977

Total Top-Quark Pair-Production Cross Section at Hadron Colliders Through O ( α S 4 ) journal, June 2013

Phenomenological profile of top squarks from natural supersymmetry at the LHC journal, March 2017

Multilepton signals from supersymmetry at hadron supercolliders journal, January 1992

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

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

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

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

Hunting quasidegenerate Higgsinos journal, April 2014

Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos journal, December 2017

Using b -tagging to enhance the supersymmetry reach of the CERN Large Hadron Collider journal, August 2005

NLO QCD and electroweak corrections to W W W production at the LHC journal, April 2017

Soft breaking of supersymmetry journal, January 1982

Search for top squark pair production in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV using single lepton events journal, October 2017

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

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

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

Mixed axion/neutralino dark matter in the SUSY DFSZ axion model journal, December 2013

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

Natural SUSY endures journal, September 2012

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

An introduction to PYTHIA 8.2 journal, June 2015

Natural generalized mirage mediation journal, December 2016

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

Top quark pair production in association with a Z -boson at next-to-leading-order accuracy journal, March 2012

Pileup subtraction using jet areas journal, January 2008

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

Improved transverse-mass variable for detecting Higgs-boson decays into Z pairs journal, July 1987

SUSY, the Third Generation and the LHC journal, March 2012

A New Light Boson? journal, January 1978

Probing light higgsinos in natural SUSY from monojet signals at the LHC journal, February 2014

The MSSM parameter space with non-universal Higgs masses journal, July 2002

Next-to-leading order QCD predictions for W + W + jj production at the LHC journal, December 2010

Discovering supersymmetry with like-sign dileptons journal, October 1993

$$ t\overline t {W^{\pm }} $$ production and decay at NLO journal, July 2012

Vector boson pair production at the LHC
journal, July 2011

Multichannel assault on natural supersymmetry at the high luminosity LHC
journal, August 2016

Implications of non-universality of soft terms in supersyrnmetric grand unified theories
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Gluino-cascade-decay signatures at the Fermilab Tevatron collider
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On the MSSM Higgsino mass and fine tuning
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Observables in Low-Energy Superstring Models
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The anti- k _t jet clustering algorithm
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Physics at a Higgsino factory
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MadGraph 5: going beyond
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Natural SUSY with a bino- or wino-like LSP
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Compressed electroweakino spectra at the LHC
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Supersymmetry, naturalness, and signatures at the CERN LHC
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Problem of Strong $P$ and $T$ Invariance in the Presence of Instantons
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Monojets and monophotons from light Higgsino pair production at LHC14
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Direct, indirect and collider detection of neutralino dark matter in SUSY models with non-universal Higgs masses
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Measuring masses of semi-invisibly decaying particle pairs produced at hadron colliders
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Radiatively-driven natural supersymmetry at the LHC
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Nonuniversal soft supersymmetry breaking and dark matter
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Weak Scale Supersymmetry
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Monojet plus soft dilepton signal from light higgsino pair production at LHC14
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Constraining BSM physics at the LHC: four top final states with NLO accuracy in perturbative QCD
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$CP$ Conservation in the Presence of Pseudoparticles
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Total Top-Quark Pair-Production Cross Section at Hadron Colliders Through $O (α_{S}^{4})$
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Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
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Mainly axion cold dark matter from natural supersymmetry
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How conventional measures overestimate electroweak fine-tuning in supersymmetric theory
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Hunting quasidegenerate Higgsinos
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Reach of the high-energy LHC for gluinos and top squarks in SUSY models with light Higgsinos
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Using $b$ -tagging to enhance the supersymmetry reach of the CERN Large Hadron Collider
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NLO QCD and electroweak corrections to $W W W$ production at the LHC
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Soft breaking of supersymmetry
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Search for top squark pair production in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV using single lepton events
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Generalized Supersoft Supersymmetry Breaking and a Solution to the $μ$ Problem
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Exploration of the MSSM with non-universal Higgs masses
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Mixed axion/neutralino dark matter in the SUSY DFSZ axion model
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Radiative Natural Supersymmetry with a 125 GeV Higgs Boson
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SUSY models under siege: LHC constraints and electroweak fine-tuning
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Natural SUSY endures
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Same-Sign Diboson Signature from Supersymmetry Models with Light Higgsinos at the LHC
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An introduction to PYTHIA 8.2
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Natural generalized mirage mediation
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Heavy-flavor tagging and the supersymmetry reach of the CERN Large Hadron Collider
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Top quark pair production in association with a $Z$ -boson at next-to-leading-order accuracy
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Superparticle phenomenology from the natural mini-landscape
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SUSY, the Third Generation and the LHC
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A New Light Boson?
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Probing light higgsinos in natural SUSY from monojet signals at the LHC
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Next-to-leading order QCD predictions for W + W + jj production at the LHC
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Discovering supersymmetry with like-sign dileptons
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$$ t\overline t {W^{\pm }} $$ production and decay at NLO
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