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Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC

Journal Article · · Journal of Physics. G, Nuclear and Particle Physics
 [1];  [2];  [3]
  1. Univ. of Florida, Gainesville, FL (United States). Inst. for Fundamental Theory. Physics Dept.; OSTI
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Ghent Univ. (Belgium)
  3. European Organization for Nuclear Research (CERN), Geneva (Switzerland)

The purpose of this review is to investigate what kind of physics can be extracted at the Large Hadron Collider (LHC), assuming a discovery is made in events with missing transverse momentum, as generically expected in supersymmetry (SUSY) with R-parity conservation. To set the scene, we first discuss the collider phenomenology of the six possible electroweakino benchmark scenarios, as they provide valuable insight into what one might be facing at the LHC. We review the existing methods for mass reconstruction from measured kinematic endpoints in the distributions of suitable variables, e.g. the invariant masses of various sets of visible decay products, as well as the MT2 and the M2 types of variables. We propose to extend the application of these methods to the various topologies of fully hadronic final states, possibly with hadronically reconstructed massive bosons (W, Z or h). We test the idea with a simplified simulation of events in the main electroweakino benchmark scenarios. We find that the fully hadronic events allow the complete determination of the relevant mass spectrum. For comparison, we also review the potential of the standard kinematic endpoint methods for final states involving leptons from the decays of (on-shell or off-shell) sleptons. We find that with 300 fb-1, the statistics for the leptonic events is very marginal and they look less promising than the fully hadronic channels. This corresponds to a complete reversal of the usual paradigm, where leptonic events comprised the gold-plated SUSY channels. Finally, we put together all available information and summarize what level of understanding of the underlying physics can be achieved. We show that, as a by-product of the mass reconstruction, it is also possible to determine the production cross sections and decay branching ratios, which in turn enable us to pinpoint the underlying model.

Research Organization:
Univ. of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0010296
OSTI ID:
1802076
Alternate ID(s):
OSTI ID: 22899701
Journal Information:
Journal of Physics. G, Nuclear and Particle Physics, Journal Name: Journal of Physics. G, Nuclear and Particle Physics Journal Issue: 11 Vol. 46; ISSN 0954-3899
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (204)

Heavy Higgs bosons at low tan β: from the LHC to 100 TeV journal January 2017
Re-interpreting the Oxbridge stransverse mass variable M T2 in general cases journal March 2013
The hierarchy solution to the LHC inverse problem journal June 2015
Heavy Higgs bosons at 14 TeV and 100 TeV journal November 2015
Supergauge invariant extension of the Higgs mechanism and a model for the electron and its neutrino journal January 1975
Little Higgs models and their phenomenology journal January 2007
Generic and chiral extensions of the supersymmetric standard model journal March 1999
Phenomenological consequences of supersymmetry with anomaly induced masses journal October 1999
Phenomenology of light top squarks at the Fermilab Tevatron journal August 1991
Top and bottom squark searches in run II of the Fermilab Tevatron journal July 2000
Pair-produced heavy particle topologies: MSSM neutralino properties at the LHC from gluino/squark cascade decays text January 2006
Precision sparticle spectroscopy in the inclusive same-sign dilepton channel at LHC text January 2009
How to look for supersymmetry under the lamppost at the LHC text January 2010
Non-universal gaugino masses, the supersymmetric little hierarchy problem, and dark matter text January 2012
Focus Point in Gaugino Mediation ~ Reconsideration of the Fine-tuning Problem ~ text January 2013
Sparticle Mass Hierarchies, Simplified Models from SUGRA Unification, and Benchmarks for LHC Run-II SUSY Searches text January 2014
Distinguishing LSP archetypes via gluino pair production at LHC13 text January 2015
Using sorted invariant mass variables to evade combinatorial ambiguities in cascade decays text January 2015
Search for resonances decaying into top-quark pairs using fully hadronic decays in pp collisions with ATLAS at $ \sqrt{s}=7 $ TeV journal January 2013
Sparticle mass hierarchies, simplified models from SUGRA unification, and benchmarks for LHC Run-II SUSY searches journal January 2015
OPTIMASS: a package for the minimization of kinematic mass functions with constraints journal January 2016
Heavy Higgs bosons at low tan β: from the LHC to 100 TeV journal January 2017
$ {\sqrt {{\widehat{s}}}_{\min }} $ resurrected journal February 2012
Using sorted invariant mass variables to evade combinatorial ambiguities in cascade decays journal February 2016
Re-interpreting the Oxbridge stransverse mass variable M T2 in general cases journal March 2013
Bisection-based asymmetric M T2 computation: a higher precision calculator than existing symmetric methods journal March 2015
Search for massive resonances decaying into WW, WZ or ZZ bosons in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal March 2017
Dark matter particle spectroscopy at the LHC: generalizing M T2 to asymmetric event topologies journal April 2010
Search for resonant t t ¯ $$ \mathrm{t}\overline{\mathrm{t}} $$ production in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal April 2019
The stransverse mass, M T2, in special cases journal May 2011
Natural supersymmetry: LHC, dark matter and ILC searches journal May 2012
Search for a heavy resonance decaying to a pair of vector bosons in the lepton plus merged jet final state at s = 13 $$ \sqrt{s}=13 $$ TeV journal May 2018
Identifying dark matter event topologies at the LHC journal June 2011
RECO level $ {\sqrt {s}_{\min }} $ and subsystem improved $ {\sqrt {s}_{\min }} $ : global inclusive variables for measuring the new physics mass scale in events at hadron colliders journal June 2011
The hierarchy solution to the LHC inverse problem journal June 2015
Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure journal June 2015
Detecting kinematic boundary surfaces in phase space: particle mass measurements in SUSY-like events journal June 2017
Search for long-lived charginos based on a disappearing-track signature in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector journal June 2018
Effects of invisible particle emission on global inclusive variables at hadron colliders journal July 2010
Search for a heavy resonance decaying into a Z boson and a vector boson in the ν ν ¯ q q ¯ $$ \nu \overline{\nu}\mathrm{q}\overline{\mathrm{q}} $$ final state journal July 2018
On-shell constrained M 2 variables with applications to mass measurements and topology disambiguation journal August 2014
A complete solution classification and unified algorithmic treatment for the one- and two-step asymmetric S-transverse mass M ˜ T 2 $$ {\tilde{M}}_{\mathrm{T}2} $$ event scale statistic journal August 2014
Testing invisible momentum ansatze in missing energy events at the LHC journal August 2017
Search for disappearing tracks as a signature of new long-lived particles in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal August 2018
Natural SUSY endures journal September 2012
Higgs mass and unnatural supersymmetry journal September 2014
Search for a heavy resonance decaying into a Z boson and a Z or W boson in 2ℓ2q final states at s = 13 $$ \sqrt{s}=13 $$ TeV journal September 2018
Measuring invisible particle masses using a single short decay chain journal October 2011
Revisiting combinatorial ambiguities at Hadron Colliders with M T2 journal October 2011
Extracting the dark matter mass from single stage cascade decays at the LHC journal November 2010
Hidden SUSY at the LHC: the light higgsino-world scenario and the role of a lepton collider journal November 2011
Reducing combinatorial uncertainties: a new technique based on M T2 variables journal November 2011
Heavy Higgs bosons at 14 TeV and 100 TeV journal November 2015
NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation journal December 2016
Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector journal December 2017
The Snowmass Points and Slopes: benchmarks for SUSY searches journal September 2002
Proposed Post-LEP benchmarks for supersymmetry journal December 2001
Supersymmetry, supergravity and particle physics journal August 1984
The search for supersymmetry: Probing physics beyond the standard model journal January 1985
Supersymmetric dark matter journal March 1996
A lagrangian model invariant under supergauge transformations journal March 1974
Phenomenology of the production, decay, and detection of new hadronic states associated with supersymmetry journal July 1978
Gauge models with spontaneously broken local supersymmetry journal December 1982
Factorizable dual model of pions journal August 1971
Supergauge transformations in four dimensions journal February 1974
Upper bounds on supersymmetric particle masses journal August 1988
Neutralino dark matter in focus point supersymmetry journal June 2000
The fine-tuning price of LEP journal March 1998
About the fine-tuning price of LEP journal August 1998
Measuring masses of semi-invisibly decaying particle pairs produced at hadron colliders journal September 1999
Generic and chiral extensions of the supersymmetric standard model journal March 1999
Phenomenological consequences of supersymmetry with anomaly induced masses journal October 1999
Reconstruction of fundamental SUSY parameters journal April 2003
Fittino, a program for determining MSSM parameters from collider observables using an iterative method journal January 2006
Detection of MSSM Higgs bosons from supersymmetric particle cascade decays at the LHC journal March 2004
Split supersymmetry journal November 2004
Erratum to: “Split supersymmetry” [Nucl. Phys. B 699 (2004) 65] journal January 2005
The well-tempered neutralino journal May 2006
Naturalness and focus points with non-universal gaugino masses journal May 2010
SUSY fits with full LHC Run I data journal April 2016
Early spin determination at the LHC? journal May 2011
A new method for resolving combinatorial ambiguities at hadron colliders journal June 2011
Mass splitting between charged and neutral winos at two-loop level journal April 2013
Focus point in gaugino mediation — Reconsideration of the fine-tuning problem journal May 2013
Search for diboson resonances with boson-tagged jets in pp collisions at s = 13  TeV with the ATLAS detector journal February 2018
The soft supersymmetry-breaking Lagrangian: theory and applications journal February 2005
Weak Scale Supersymmetry book January 2006
Supersymmetry facing experiment: much ado (already) about nothing (yet) journal October 2006
A variable for measuring masses at hadron colliders when missing energy is expected; m T 2 : the truth behind the glamour journal September 2003
CMS Physics Technical Design Report, Volume II: Physics Performance journal April 2007
Measurement of SUSY Masses via Cascade Decays for SPS 1a journal December 2004
Transverse observables and mass determination at hadron colliders journal February 2008
root_s_hat_min: a global inclusive variable for determining the mass scale of new physics in events with missing energy at hadron colliders journal March 2009
Supersymmetric particle mass measurement with invariant mass correlations journal April 2009
Precise reconstruction of sparticle masses without ambiguities journal August 2009
Supergravity as the messenger of supersymmetry breaking journal May 1983
Dual Theory for Free Fermions journal May 1971
Phenomenology of gluino decays via loops and top-quark Yukawa coupling journal September 1990
Phenomenology of light top squarks at the Fermilab Tevatron journal August 1991
Sparticle spectrum constraints journal December 1993
Trileptons from chargino-neutralino production at the CERN Large Hadron Collider journal October 1994
Naturalness and superpartner masses or when to give up on weak scale supersymmetry journal August 1995
Precision SUSY measurements at CERN LHC journal May 1997
Naturalness, weak scale supersymmetry, and the prospect for the observation of supersymmetry at the Fermilab Tevatron and at the CERN LHC journal September 1998
Measurements of masses in supergravity models at CERN LHC journal May 2000
Top and bottom squark searches in run II of the Fermilab Tevatron journal July 2000
Focus point supersymmetry: Proton decay, flavor and CP violation, and the Higgs boson mass journal April 2001
Bounds on universal extra dimensions journal June 2001
Probes of universal extra dimensions at colliders journal October 2001
Loop induced Higgs and Z boson couplings to neutralinos and implications for collider and dark matter searches journal March 2002
Radiative corrections to Kaluza-Klein masses journal August 2002
Bosonic supersymmetry? Getting fooled at the CERN LHC journal September 2002
Study of the slepton nonuniversality at the CERN Large Hadron Collider journal October 2004
PeV-scale supersymmetry journal January 2005
Erratum: Study of the slepton nonuniversality at the CERN Large Hadron Collider [Phys. Rev. D 70 , 075016 (2004)] journal March 2005
Discrimination of supersymmetry and universal extra dimensions at hadron colliders journal November 2005
Publisher’s Note: Discrimination of supersymmetry and universal extra dimensions at hadron colliders [Phys. Rev. D 72 , 096006 (2005)] journal December 2005
Top partners at the CERN LHC: Spin and mass measurement journal July 2006
It is a gluino journal November 2006
Phenomenology of a littlest Higgs model with T parity: Including effects of T-odd fermions journal December 2006
Missing energy look-alikes with 100     pb − 1 at the CERN LHC journal October 2008
M T 2 -assisted on-shell reconstruction of missing momenta and its application to spin measurement at the LHC journal February 2009
Model discrimination at the LHC: A case study journal April 2009
Reconstructing the Higgs boson in dileptonic W decays at hadron colliders journal October 2009
Precision superpartner spectroscopy in the inclusive same-sign dilepton channel at the LHC journal October 2010
Mass measurement in boosted decay systems at hadron colliders journal August 2011
Guide to transverse projections and mass-constraining variables journal November 2011
Reconstructing the heavy resonance at hadron colliders journal November 2011
Nonuniversal gaugino masses, the supersymmetric little hierarchy problem, and dark matter journal March 2012
Mixing it up with M T 2 : Unbiased mass measurements at hadron colliders journal April 2012
Focus point supersymmetry redux journal April 2012
Radiative natural supersymmetry: Reconciling electroweak fine-tuning and the Higgs boson mass journal June 2013
Post-LHC8 supersymmetry benchmark points for ILC physics journal September 2013
Search for the standard model Higgs boson produced through vector boson fusion and decaying to b b ¯ journal August 2015
Distinguishing LSP archetypes via gluino pair production at LHC13 journal August 2015
Resolving combinatorial ambiguities in dilepton t t ¯ event topologies with constrained M 2 variables journal October 2017
Recursive jigsaw reconstruction: HEP event analysis in the presence of kinematic and combinatoric ambiguities journal December 2017
Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks journal January 2018
Search for massive resonances decaying into W W , W Z , Z Z , q W , and q Z with dijet final states at s = 13     TeV journal April 2018
Transverse Mass for Pairs of Gluinos journal April 2008
Novel Reconstruction Technique for New Physics Processes with Initial State Radiation journal October 2009
Superpartner Mass Measurement Technique using 1D Orthogonal Decompositions of the Cambridge Transverse Mass Variable M T 2 journal July 2010
How to Look for Supersymmetry under the LHC Lamppost journal November 2010
General Method for Determining the Masses of Semi-Invisibly Decaying Particles at Hadron Colliders journal August 2011
Probing Resonance Decays to Two Visible and Multiple Invisible Particles journal May 2014
Combined Measurement of the Higgs Boson Mass in p p Collisions at s = 7 and 8 TeV with the ATLAS and CMS Experiments journal May 2015
Locally Supersymmetric Grand Unification journal October 1982
Discovering Supersymmetry at the Tevatron in W -ino Lightest Supersymmetric Particle Scenarios journal August 1999
Multi-TeV Scalars are Natural in Minimal Supergravity journal March 2000
Spin correlations in decay chains involving W bosons journal August 2007
Measuring unification journal January 2011
Benchmark models, planes, lines and points for future SUSY searches at the LHC journal December 2011
SModelS: a tool for interpreting simplified-model results from the LHC and its application to supersymmetry journal May 2014
Designing and recasting LHC analyses with MadAnalysis  5 journal October 2014
Fastlim: a fast LHC limit calculator journal November 2014
Identifying phase-space boundaries with Voronoi tessellations journal November 2016
Global fits of GUT-scale SUSY models with GAMBIT journal December 2017
Search for heavy resonances that decay into a vector boson and a Higgs boson in hadronic final states at $$\sqrt{s} = 13$$ s = 13 $$\,\text {TeV}$$ TeV journal September 2017
ColliderBit: a GAMBIT module for the calculation of high-energy collider observables and likelihoods journal November 2017
SpecBit, DecayBit and PrecisionBit: GAMBIT modules for computing mass spectra, particle decay rates and precision observables journal January 2018
Pair-produced heavy particle topologies: MSSM neutralino properties at the LHC from gluino/squark cascade decays journal December 2005
Phenomenology of Littlest Higgs Model with T-Parity: Including Effects of T-Odd Fermions conference June 2012
A Supersymmetry Primer book July 1998
Two-Body Radiative Gluino Decays journal November 1988
A Review of spin Determination at the lhc journal November 2008
Naturalness and the Status of Supersymmetry journal October 2013
Little Higgs Theories journal December 2005
Edge detecting new physics the Voronoi way journal May 2016
Search for the standard model Higgs boson produced through vector boson fusion and decaying to b¯b text January 2015
NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation text January 2016
Search for resonant t t ¯ text January 2019
Chapter 3: Beyond the Standard Model Phenomena text January 2017
Post-LHC8 supersymmetry benchmark points for ILC physics text January 2013
Search for a heavy resonance decaying into a Z boson and a vector boson in the $ \nu \overline{\nu}\mathrm{q}\overline{\mathrm{q}} $ final state text January 2018
\sqrt{s}_min: a global inclusive variable for determining the mass scale of new physics in events with missing energy at hadron colliders text January 2008
Novel reconstruction technique for New Physics processes with initial state radiation text January 2009
Reconstructing the Higgs boson in dileptonic W decays at hadron collider text January 2009
Dark Matter Particle Spectroscopy at the LHC: Generalizing MT2 to Asymmetric Event Topologies text January 2009
A New Method for Resolving Combinatorial Ambiguities at Hadron Colliders text January 2010
Identifying Dark Matter Event Topologies at the LHC text January 2010
Reducing combinatorial uncertainties: A new technique based on MT2 variables text January 2011
Focus Point Supersymmetry Redux text January 2011
Radiative natural supersymmetry: Reconciling electroweak fine-tuning and the Higgs boson mass text January 2012
SModelS: a tool for interpreting simplified-model results from the LHC and its application to supersymmetry text January 2013
On-shell constrained $M_2$ variables with applications to mass measurements and topology disambiguation text January 2014
SUSY fits with full LHC Run I data preprint January 2014
Identifying Phase Space Boundaries with Voronoi Tessellations text January 2016
NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation text January 2016
Global fits of GUT-scale SUSY models with GAMBIT text January 2017
Neutralino Dark Matter in Focus Point Supersymmetry text January 2000
Focus Point Supersymmetry: Proton Decay, Flavor and CP Violation, and the Higgs Boson Mass text January 2000
Bounds on Universal Extra Dimensions text January 2000
Probes Of Universal Extra Dimensions at Colliders text January 2001
Radiative Corrections to Kaluza-Klein Masses text January 2002
Bosonic Supersymmetry? Getting Fooled at the LHC text January 2002
Detection of MSSM Higgs bosons from supersymmetric particle cascade decays at the LHC text January 2003
The Soft Supersymmetry-Breaking Lagrangian: Theory and Applications text January 2003
Split Supersymmetry text January 2004
Measurement of SUSY masses via cascade decays for SPS 1a text January 2004
PeV-Scale Supersymmetry text January 2004
Trileptons from Chargino-Neutralino Production at the CERN Large Hadron Collider text January 1994
Search for the standard model Higgs boson produced through vector boson fusion and decaying to $b\bar{b}$ text January 2015
Global fits of GUT-scale SUSY models with GAMBIT text January 2017
Search for a heavy resonance decaying into a Z boson and a vector boson in the $ \nu \overline{\nu}\mathrm{q}\overline{\mathrm{q}} $ final state text January 2018

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