A new approach for detecting compressed bino/wino at the LHC

Abstract

In some supersymmetric models like split supersymmetry or models with non-universal gaugino mass, bino (LSP) and winos (NLSP) may have rather small mass splitting in order to provide the correct dark matter relic density through bino/wino co-annihilation. Such a scenario with the compressed bino/wino is difficult to explore at the LHC. In this work we propose to probe this scenario from $pp\to j{\tilde{\chi }}_2^0{\tilde{\chi }}_1^{\pm }$ followed by ${\tilde{\chi }}_2^0\to \gamma {\tilde{\chi }}_1^0$ and ${\tilde{\chi }}_1^{\pm }\to W^{\ast }{\tilde{\chi }}_1^0\to {\ell }^{\pm }\nu {\tilde{\chi }}_1^0$ (this method is also applicable to the compressed bino/higgsino scenario). Through a detailed Monte Carlo simulation for both the signal and the backgrounds, we find that for a mass splitting $\Delta M\sim 5-15$ GeV between bino (LSP) and wino (NLSP), the 14 TeV LHC with luminosity of 500$f{b}^{-1}$ can probe the wino up to 150 GeV (the sensitivity can reach $5\sigma$ for $\Delta M=5$ GeV and $2\sigma$ for $\Delta M=15$ GeV). We also investigate the dark matter detection sensitivities for this scenario and find that the planned XENON-1T(2017) cannot fully cover the parameter space with wino below 150 GeV allowed by relic density and the LUX limits.

14 pages, 4 figures

References in corpus (25)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The Well-Tempered Neutralino
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• Indirect search for dark matter with micrOMEGAs2.4
• SuperIso: A program for calculating the isospin asymmetry of B -> K* gamma in the MSSM
• Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV
• Blind Spots for neutralino Dark Matter in the MSSM with an intermediate m_A
• Nearly Degenerate Gauginos and Dark Matter at the LHC
• Light Neutralino Dark Matter: Direct/Indirect Detection and Collider Searches
• Supersymmetry, Naturalness, and Light Higgsinos
• Closing the stop gap
• NMSSM with a singlino LSP: possible challenges for searches for supersymmetry at the LHC
• The Electroweak Sector of the pMSSM in the Light of LHC - 8 TeV and Other Data
• Physics at a Higgsino Factory
• Stop on Top
• Electroweakino constraints from LHC data
• Catching sparks from well-forged neutralinos
• Degenerate gaugino mass region and mono-boson collider signatures
• The Higgsino-Singlino World at the Large Hadron Collider
• Implications of an axino LSP for naturalness
• Magic Messengers in Gauge Mediation and signal for 125 GeV boosted Higgs boson
• Pseudo-goldstino and electroweak gauginos at the LHC

Cited by in corpus (12)

• Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
• The Relic Neutralino Surface at a 100 TeV collider
• Electroweakino constraints from LHC data
• Impact of LHC data on muon $g-2$ solutions in vector-like extension of the Constrained MSSM
• Illuminating New Electroweak States at Hadron Colliders
• Coscattering in next-to-minimal dark matter and split supersymmetry
• Pseudo-goldstino and electroweakinos via VBF processes at LHC
• New Physics Search at the CEPC: a General Perspective
• Chasing New Physics in Stacks of Soft Tracks
• SUSY effects in Higgs productions at high energy $e^{+}{e}^{-}$ colliders
• Renormalization Effects on Electric Dipole Moments in Electroweakly Interacting Massive Particle Models
• Higgsino Dark Matter in an economical Scherk-Schwarz setup