Supersymmetric particle mass measurement with the boost-corrected contransverse mass

Abstract

A modification to the contransverse mass (MCT) technique for measuring the masses of pair-produced semi-invisibly decaying heavy particles is proposed in which MCT is corrected for non-zero boosts of the centre-of-momentum (CoM) frame of the heavy states in the laboratory transverse plane. Lack of knowledge of the mass of the CoM frame prevents exact correction for this boost, however it is shown that a conservative correction can nevertheless be derived which always generates an MCT value which is less than or equal to the true value of MCT in the CoM frame. The new technique is demonstrated with case studies of mass measurement with fully leptonic ttbar events and with SUSY events possessing a similar final state.

33 pages, 33 .eps figures, JHEP3 style

References in corpus (12)

• Gluino Stransverse Mass
• Measuring superparticle masses at hadron collider using the transverse mass kink
• Using Subsystem MT2 for Complete Mass Determinations in Decay Chains with Missing Energy at Hadron Colliders
• Minimal Kinematic Constraints and MT2
• On measuring the masses of pair-produced semi-invisibly decaying particles at hadron colliders
• MTGEN : Mass scale measurements in pair-production at colliders
• Transverse Observables and Mass Determination at Hadron Colliders
• Inclusive transverse mass analysis for squark and gluino mass determination
• Using kinematic boundary lines for particle mass measurements and disambiguation in SUSY-like events with missing energy
• Handling jets + missing E_T channel using inclusive mT2
• Precise reconstruction of sparticle masses without ambiguities
• A short comparison between m_T2 and m_CT

Cited by in corpus (59)

• CheckMATE 2: From the model to the limit
• Search for direct third-generation squark pair production in final states with missing transverse momentum and two b-jets in sqrt{s}=8 TeV pp collisions with the ATLAS detector
• Search for direct top-squark pair production in final states with two leptons in pp collisions at sqrt(s)=8TeV with the ATLAS detector
• Dark Matter Particle Spectroscopy at the LHC: Generalizing MT2 to Asymmetric Event Topologies
• A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider
• Combined collider constraints on neutralinos and charginos
• Guide to transverse projections and mass-constraining variables
• Search for direct production of electroweakinos in final states with one lepton, missing transverse momentum and a Higgs boson decaying into two $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for the direct production of charginos, neutralinos and staus in final states with at least two hadronically decaying taus and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for direct slepton and gaugino production in final states with two leptons and missing transverse momentum with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• Search for scalar bottom pair production with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• Superpartner mass measurements with 1D decomposed MT2
• Searches for third-generation squark production in fully hadronic final states in proton-proton collisions at sqrt(s) = 8 TeV
• A general method for determining the masses of semi-invisibly decaying particles at hadron colliders
• Hunting Asymmetric Stops
• Recursive Jigsaw Reconstruction: HEP event analysis in the presence of kinematic and combinatoric ambiguities
• LHC constraints and prospects for $S_1$ scalar leptoquark explaining the $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$ anomaly
• Search for the direct production of charginos and neutralinos in $\sqrt{s}$ = 13 TeV $pp$ collisions with the ATLAS detector
• Light mixed sneutrinos as thermal dark matter
• Dark matter production in association with a single top-quark at the LHC in a two-Higgs-doublet model with a pseudoscalar mediator
• Search for chargino and neutralino production in final states with a Higgs boson and missing transverse momentum at $\sqrt{s}=13$ TeV with the ATLAS detector
• RECO level \sqrt{s}_{min} and subsystem \sqrt{s}_{min}: improved global inclusive variables for measuring the new physics mass scale in missing energy events at hadron colliders
• Search for Scalar Charm Quark Pair Production in pp Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector
• On-shell constrained $M_2$ variables with applications to mass measurements and topology disambiguation
• Search for electroweak production of charginos and neutralinos in WH events in proton-proton collisions at sqrt(s) = 13 TeV
• Search for direct pair production of supersymmetric partners to the $\tau$ lepton in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Electron and Muon Anomalous Magnetic Moments in the Inverse Seesaw Extended NMSSM
• Searches for pair production of third-generation squarks in sqrt(s) = 13 TeV pp collisions
• Using M_T2 to Distinguish Dark Matter Stabilization Symmetries
• The stransverse mass, MT2, in special cases
• Re-interpreting the Oxbridge stransverse mass variable MT2 in general cases
• Amplification of endpoint structure for new particle mass measurement at the LHC
• Revisiting the Exclusion Limits from Direct Chargino-Neutralino Production at the LHC
• Strategies for Probing Non-Minimal Dark Sectors at Colliders: The Interplay Between Cuts and Kinematic Distributions
• Search for an excess of events with an identical flavour lepton pair and significant missing transverse momentum in sqrt{s} = 7 TeV proton-proton collisions with the ATLAS detector
• Extracting the Dark Matter Mass from Single Stage Cascade Decays at the LHC
• OPTIMASS: A Package for the Minimization of Kinematic Mass Functions with Constraints
• Mass reconstruction with $M_2$ under constraint in semi-invisible production at a hadron collider
• Digging Deeper for New Physics in the LHC Data
• Determination of the CMSSM Parameters using Neural Networks
• Non-Simplified SUSY: Stau-Coannihilation at LHC and ILC
• Improved mass measurement using the boundary of many-body phase space
• Detecting kinematic boundary surfaces in phase space: particle mass measurements in SUSY-like events
• Mass measurement in boosted decay systems at hadron colliders
• Identifying Phase Space Boundaries with Voronoi Tessellations
• Constrained $\sqrt{{\hat{S}}_{min}}$ and reconstructing with semi-invisible production at hadron colliders
• Testing Invisible Momentum Ansatze in Missing Energy Events at the LHC
• General analysis of signals with two leptons and missing energy at the Large Hadron Collider
• Signal region combination with full and simplified likelihoods in MadAnalysis 5
• Electroweakino searches at the HL-LHC in the baryon number violating MSSM
• Status of searches for electroweak-scale supersymmetry after LHC Run 2
• Supersymmetry with a Sister Higgs
• Lessons for SUSY from the LHC after the first run
• Multi-Dimensional Phase Space Methods for Mass Measurements and Decay Topology Determination
• Whac-a-constraint with anomaly-free dark matter models
• Mitigation of the LHC Inverse Problem
• Extracting gluino endpoints with event topology patterns
• Spin and Chirality Effects in Antler-Topology Processes at High Energy $e^{+}{e}^{-}$ Colliders
• Stop searches in flavourful supersymmetry