“L = R” - U(1) R lepton number at the LHC

Supersymmetry without R parity and without lepton number.

We investigate Supersymmetric models where neither R parity nor lepton number is imposed. Neutrino masses can be kept highly suppressed compared to the electroweak scale if the μ-terms in the superpotential are aligned with the SUSY-breaking bilinear B-terms. This situation arises naturally in the framework of horizontal symmetries. The same symmetries suppress the trilinear R parity violating ...

Extracting the Flavour Structure of a Baryon-Number R-parity Violating Coupling at the LHC

The detection of the flavour content of jets produced from R-parity violating neutralino decays is investigated in the case where one baryon-number violating coupling dominates. Simulations are performed of the ATLAS experiment at the LHC for all couplings, other than λ tjk since neutralino decays through these couplings are very suppressed. Secondary vertex distributions and muons produced by ...

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

The measurement of sparticle masses in the Minimal Supersymmetric Standard Model at the LHC is analysed, in the scenario where the lightest neutralino, the χ̃1, decays into three quarks. Such decays, occurring through the baryon-number violating coupling λ 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 mult...

The FP 420 R & D Project at the LHC

R-Hadron and long lived particle searches at the LHC

If long lived charged particles exist, and produced at the LHC, they may travel with velocity significantly slower than the speed of light. This unique signature was not considered during the design of the LHC experiments, ATLAS and CMS. As a result, hardware and trigger capabilities need to be evaluated. Model independent approaches for finding long lived particles with the LHC experiments are...