Resolving the existence of Higgsinos in the LHC inverse problem

Abstract

The LHC inverse problem is infamously challenging when neutralinos and charginos are heavy and pure and other superparticles are decoupled. This limit is becoming more relevant to particle physics nowadays. Fortunately, in this limit, Higgsinos produce a distinctive signature if they are the LSPs or NLSPs. The identifying signature is the presence of equal numbers of Z bosons and Higgs bosons in NLSP productions and subsequent decays at hadron colliders. The signature is derived from the Goldstone equivalence theorem by which partial widths into Z and Higgs bosons are inherently related and from the fact that Higgsinos consist of two indistinguishable neutralinos. Thus it is valid in general for many supersymmetry models; exceptions may happen when Higgsino NLSPs decay to weakly coupled LSPs such as axinos or gravitinos.

25 pages, 6 figures; v.2: published version with measurement prospects updated

References in corpus (8)

• Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Implications of Supersymmetry Breaking with a Little Hierarchy between Gauginos and Scalars
• Natural Priors, CMSSM Fits and LHC Weather Forecasts
• Measuring Supersymmetry
• Discovery and Measurement of Sleptons, Binos, and Winos with a Z'
• Solving the LHC Inverse Problem with Dark Matter Observations
• The LHC Inverse Problem, Supersymmetry, and the ILC
• Discriminating Electroweak-ino Parameter Ordering at the LHC and Its Impact on LFV Studies

Cited by in corpus (5)

• Prospects for Electroweakino Discovery at a 100 TeV Hadron Collider
• Implications of an axino LSP for naturalness
• Light Higgsino Decays as a Probe of the NMSSM
• Prospects for observing charginos and neutralinos at a 100 TeV proton-proton collider
• Very Degenerate Higgsino Dark Matter