Determining R-parity violating parameters from neutrino and LHC data

TL;DR

This paper explores how combining neutrino and LHC data can precisely determine R-parity violating parameters in supersymmetric models, especially the bilinear model, and discusses implications for collider experiments.

Contribution

It provides a detailed analysis of the expected precision in determining R-parity violating parameters using combined neutrino and collider data, including phase ambiguities.

Findings

Accurate R-parity parameter determination is possible with combined data.

Certain parameters can only be determined up to relative signs or phases.

Predictions include implications for future linear collider measurements.

Abstract

In supersymmetric models neutrino data can be explained by R-parity violating operators which violate lepton number by one unit. The so called bilinear model can account for the observed neutrino data and predicts at the same time several decay properties of the lightest supersymmetric particle. In this paper we discuss the expected precision to determine these parameters by combining neutrino and LHC data and discuss the most important observables. We show that one can expect a rather accurate determination of the underlying R-parity parameters assuming mSUGRA relations between the R-parity conserving ones and discuss briefly also the general MSSM as well as the expected accuracies in case of a prospective e+ e- linear collider. An important observation is that several parameters can only be determined up to relative signs or more generally relative phases.