Measuring Supersymmetric Particle Masses at the LHC in Scenarios with Baryon-Number R-Parity Violating Couplings

Abstract

The measurement of sparticle masses in the Minimal Supersymmetric Standard Model at the LHC is analysed, in the scenario where the lightest neutralino decays into three quarks. Such decays, occurring through the baryon-number violating coupling lambda"\_ijk, pose a severe challenge to the capability of the LHC detectors since the final state has no missing energy signature and a high jet multiplicity. We focus on the case of non-zero lambda"\_212 which is the most difficult experimentally. The proposed method is valid over a wide range of SUGRA parameter space with lambda"\_212 between 10^{-5}-0.1. Simulations are performed of the ATLAS detector at the Large Hadron Collider. Using the lightest neutralino from the decay chain left-squark to quark + next-to-lightest neutralino to right-slepton + lepton + quark and finally to lightest neutralino + lepton pair + quark, we show that the lightest and next-to-lightest neutralino masses can be measured by 3-jet and 3-jet + lepton pair invariant mass combinations. At the SUGRA point M_0=100 GeV, M_{1/2}=300 GeV, A_0=300 GeV, tan beta=10, sign of mu positive and with lambda"\_212=0.005, we achieve statistical (systematic) errors of 3 (3), 3 (3), 0.3 (4) and 5 (12) GeV respectively for the masses of the lightest neutralino, next-to-lightest neutralino, right-slepton and left-squark, with an integrated luminosity of 30 fb^{-1}.

16 pages, 9 postscript figures

References in corpus (1)

• Simulations of R-parity Violating SUSY Models

Cited by in corpus (20)

• R-parity violating supersymmetry
• Chirally improving Wilson fermions II. Four-quark operators
• A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider
• Theoretical uncertainties in sparticle mass predictions from computational tools
• Discovering baryon-number violating neutralino decays at the LHC
• Minimal Flavor Violation, Seesaw, and R-parity
• Probing bilinear R-parity violating supergravity at the LHC
• Mass Spectrum in R-Parity Violating mSUGRA and Benchmark Points
• Twisted mass QCD and lattice approaches to the $\Delta I=1/2$ rule
• Attempts at Explaining the NuTeV Observation of Di-Muon Events
• R-Parity Violation at the LHC
• The epsilon regime with Wilson fermions
• Can R-parity violation hide vanilla supersymmetry at the LHC?
• R-parity violating resonant stop production at the Large Hadron Collider
• Extracting the Flavour Structure of a Baryon-Number R-parity Violating Coupling at the LHC
• Improving SUSY Spectrum Determinations at the LHC with Wedgebox Technique
• Measuring R-parity-violating couplings in dilepton production at the LHC
• Large Hadron Collider constraints on a light baryon number violating sbottom coupling to a top and a light quark
• Multiparticle Production in QCD Jets
• Supersymmetric Models and Collider Signatures