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Abstract: Spin measurements are crucial in distinguishing major scenarios of TeV scalenew physics once it is discovered at the LHC. We give a brief survey of methodsof measuring the spin of new physics particles at the LHC. We focus on the casein which a long lived massive neutral particle is produced at the end of everycascade decay and escape detection. This is the case for R-parity preservingsupersymmetry, Little Higgs models with T-parity, extra-dimensional models withKK-parity, and a large class of similar models and scenarios. After brieflycommenting on measuring spin by combining mass and rate information, weconcentrate on direct measurement by observing angular correlations among decayproducts of the new physics particles. We survey a wide range of possiblechannels, discuss the construction of possible correlation variables, andoutline experimental challenges. We also briefly survey the Monte-Carlo toolswhich are useful in studying such correlations.



Autor: Lian-Tao Wang, Itay Yavin

Fuente: https://arxiv.org/







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