A Review of Spin Determination at the LHC

Abstract

Spin measurements are crucial in distinguishing major scenarios of TeV scale new physics once it is discovered at the LHC. We give a brief survey of methods of measuring the spin of new physics particles at the LHC. We focus on the case in which a long lived massive neutral particle is produced at the end of every cascade decay and escape detection. This is the case for R-parity preserving supersymmetry, Little Higgs models with T-parity, extra-dimensional models with KK-parity, and a large class of similar models and scenarios. After briefly commenting on measuring spin by combining mass and rate information, we concentrate on direct measurement by observing angular correlations among decay products of the new physics particles. We survey a wide range of possible channels, discuss the construction of possible correlation variables, and outline experimental challenges. We also briefly survey the Monte-Carlo tools which are useful in studying such correlations.

To appear in "Perspectives on the LHC", edited by G. Kane and A. Pierce

References in corpus (5)

• Gluino Stransverse Mass
• It's a Gluino!
• Mass Determination of New States at Hadron Colliders
• Discriminating spin through quantum interference
• Spin Correlations in Decay Chains Involving W Bosons

Cited by in corpus (7)

• A Review of the Mass Measurement Techniques proposed for the Large Hadron Collider
• A model independent spin analysis of fundamental particles using azimuthal asymmetries
• Missing Momentum Reconstruction and Spin Measurements at Hadron Colliders
• Spin Determination via Third Generation Cascade Decays
• Model Discrimination at the LHC: a Case Study
• Odd Decays from Even Anomalies: Gauge Mediation Signatures Without SUSY
• Momentum asymmetries as CP violating observables