Bottom-Up Reconstruction Scenarios for (un)constrained MSSM Parameters at the LHC

Abstract

We consider some specific inverse problem or "bottom-up" reconstruction strategies at the LHC for both general and constrained MSSM parameters, starting from a plausibly limited set of sparticle identification and mass measurements, using mainly gluino/squark cascade decays, plus eventually the lightest Higgs boson mass. For the three naturally separated sectors of: gaugino/Higgsino, squark/slepton, and Higgs parameters, we examine different step-by-step algorithms based on rather simple, entirely analytical, inverted relations between masses and basic MSSM parameters. This includes also reasonably good approximations of some of the relevant radiative correction calculations. We distinguish the constraints obtained for a general MSSM from those obtained with universality assumptions in the three different sectors. Our results are compared at different stages with the determination from more standard "top-down" fit of models to data, and finally combined into a global determination of all the relevant parameters. Our approach gives complementary information to more conventional analysis, and is not restricted to the specific LHC measurement specificities. In addition, the bottom-up renormalization group evolution of general MSSM parameters, being an important ingredient in this framework, is illustrated as a new publicly available option of the MSSM spectrum calculation code "SuSpect".

52 pages, 22 figures. Slight reorganization of sections, a few more results for the neutralino sector, one appendix added on neutralino sector calculation details. Version to appear in Phys. Rev. D

References in corpus (20)

• PYTHIA 6.4 Physics and Manual
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• SUSY Les Houches Accord 2
• Supersymmetry Parameter Analysis: SPA Convention and Project
• A Markov Chain Monte Carlo Analysis of the CMSSM
• Supersymmetry and the LHC Inverse Problem
• Naturalness Priors and Fits to the Constrained Minimal Supersymmetric Standard Model
• Accurate Mass Determinations in Decay Chains with Missing Energy
• Natural Priors, CMSSM Fits and LHC Weather Forecasts
• Measuring Supersymmetry
• Updated Constraints on the Minimal Supergravity Model
• A hybrid method for determining particle masses at the Large Hadron Collider with fully identified cascade decays
• Non-zero trilinear parameter in the mSUGRA model - dark matter and collider signals at Tevatron and LHC
• Light neutralinos at LHC in cosmologically-inspired scenarios: new benchmarks in the search for supersymmetry
• The LHC Inverse Problem, Supersymmetry, and the ILC
• General Features of Supersymmetric Signals at the ILC: Solving the LHC Inverse Problem
• Reconstructing Supersymmetry at ILC/LHC
• SFitter: Reconstructing the MSSM Lagrangian from LHC data
• Determination of Dark Matter Properties at High-Energy Colliders

Cited by in corpus (16)

• Physics searches at the LHC
• Measuring Unification
• Soft Probes of SU(5) Unification
• Multijet Discriminators for New Physics in Leptonic Signals at the LHC
• Determining the Structure of Supersymmetry-Breaking with Renormalization Group Invariants
• The pMSSM Interpretation of LHC Results Using Rernormalization Group Invariants
• Direct and Indirect Detection and LHC Signals of Bino-Higgsino Dark Matter
• Determination of Non-Universal Supergravity Models at the Large Hadron Collider
• Measuring Supersymmetry with Heavy Scalars
• SUSY-Breaking Parameters from RG Invariants at the LHC
• Renormalisation group invariants and sum rules: fast diagnostic tools for probing high-scale physics
• CDMS II Inspired Neutralino Dark Matter in Flipped SU(5)
• The Higgs Boson Mass as Fundamental Parameter of the Minimal Supersymmetric Standard Model
• Muons from Neutralino Annihilations in the Sun: Flipped SU(5)
• The Hierarchy Solution to the LHC Inverse Problem
• Probing the supersymmetry breaking mechanism using renormalisation group invariants