Initial determination of the spins of the gluino and squarks at LHC

Abstract

In principle particle spins can be measured from their production cross sections once their mass is approximately known. The method works in practice because spins are quantized and cross sections depend strongly on spins. It can be used to determine, for example, the spin of the top quark. Direct application of this method to supersymmetric theories will have to overcome the challenge of measuring mass at the LHC, which could require high statistics. In this article, we propose a method of measuring the spins of the colored superpatners by combining rate information for several channels and a set of kinematical variables, without directly measuring their masses. We argue that such a method could lead to an early determination of the spin of gluino and squarks. This method can be applied to the measurement of spin of other new physics particles and more general scenarios.

23 pages, 8 figures, minor changes

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Cited by in corpus (12)

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• Supersymmetric top and bottom squark production at hadron colliders
• Dark Matter Particle Spectroscopy at the LHC: Generalizing MT2 to Asymmetric Event Topologies
• SUSY parameter determination at the LHC using cross sections and kinematic edges
• Controlling ISR in sparticle mass reconstruction
• Threshold Improved QCD Corrections for Stop-Antistop production at Hadron colliders
• General analysis of signals with two leptons and missing energy at the Large Hadron Collider
• Spin Discrimination in Three-Body Decays
• F-theory and the LHC: Stau Search
• Two jets and missing $E_T$ signature to determine the spins of the new particles
• New Physics from the Top at the LHC
• Spin and Chirality Determination of Superparticles with Long-Lived Stau at the LHC