Discovery and Measurement of Sleptons, Binos, and Winos with a Z'

Abstract

Extensions of the MSSM could significantly alter its phenomenology at the LHC. We study the case in which the MSSM is extended by an additional U(1) gauge symmetry, which is spontaneously broken at a few TeV. The production cross-section of sleptons is enhanced over that of the MSSM by the process $pp\to Z^{\prime }\to \tilde{\ell }{\tilde{\ell }}^{\ast }$, so the discovery potential for sleptons is greatly increased. The flavor and charge information in the resulting decay, $\tilde{\ell }\to \ell +LSP$, provides a useful handle on the identity of the LSP. With the help of the additional kinematical constraint of an on-shell Z', we implement a novel method to measure all of the superpartner masses involved in this channel. For certain final states with two invisible particles, one can construct kinematic observables bounded above by parent particle masses. We demonstrate how output from one such observable, m_T2, can become input to a second, increasing the number of measurements one can make with a single decay chain. The method presented here represents a new class of observables which could have a much wider range of applicability.

arXiv comment20 pages, 15 figures; v2 references added and minor changes

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Cited by in corpus (35)

• The Physics of Heavy Z' Gauge Bosons
• The Hunt for New Physics at the Large Hadron Collider
• Physics searches at the LHC
• A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider
• Kinematic Cusps: Determining the Missing Particle Mass at Colliders
• The race for supersymmetry: using mT2 for discovery
• Supermodels for early LHC
• Spontaneous R-Parity Breaking in SUSY Models
• Enhancing $h\to \gamma \gamma$ with staus in SUSY models with extended gauge sector
• Aspects of Z'-mediated Supersymmetry Breaking
• The Right Side of Tev Scale Spontaneous R-Parity Violation
• The Physics of New U(1)' Gauge Bosons
• Kinematic Cusps With Two Missing Particles I: Antler Decay Topology
• Implications of gauge kinetic mixing on Z' and slepton production at the LHC
• Mass reconstruction with $M_2$ under constraint in semi-invisible production at a hadron collider
• Supersymmetric Decays of the Z' Boson
• Z' mass limits and the naturalness of supersymmetry
• Spin effects in the antler event topology at hadron colliders
• 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
• Identifying Phase Space Boundaries with Voronoi Tessellations
• Constrained $\sqrt{{\hat{S}}_{min}}$ and reconstructing with semi-invisible production at hadron colliders
• Dileptons and four leptons at Z' resonance in the early stage of the LHC
• SO(10) inspired gauge-mediated supersymmetry breaking
• Heavy Neutral Gauge Bosons at the LHC in an Extended MSSM
• Diphoton Rate of the Standard-Model-Like Higgs Boson in the Extra U(1) Extended MSSM
• Testing a U(1) Solution to the Mu Problem
• Singularity Variables for Missing Energy Event Kinematics
• Multi-Dimensional Phase Space Methods for Mass Measurements and Decay Topology Determination
• Resolving the existence of Higgsinos in the LHC inverse problem
• The super-LHC
• Combining Anomaly and Z' Mediation of Supersymmetry Breaking
• Anatomy of Heavy Gauge Bosons in a Left-Right Supersymmetric Model
• Searching for supersymmetry in Z' decays
• Heavy $Z^{\prime }$ Bosons in the Secluded $U(1{)}^{\prime }$ Model at Hadron Colliders