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Distinguishing spins in decay chains at the Large Hadron Collider.

Athanasiou, C. and Lester, C. G. and Smillie, J. M. and Webber, B. R. (2006) 'Distinguishing spins in decay chains at the Large Hadron Collider.', Journal of high energy physics., 2006 (08). 055.


If new particles are discovered at the LHC, it will be important to determine their spins in as model-independent a way as possible. We consider the case, commonly encountered in models of physics beyond the Standard Model, of a new scalar or fermion D decaying sequentially into other new particles C,B,A via the decay chain D→Cq, C→Blnear, B→Alfar, lnear and lfar being opposite-sign same-flavour charged leptons and A being invisible. We compute the observable 2- and 3-particle invariant mass distributions for all possible spin assignments of the new particles, and discuss their distinguishability using a quantitative measure known as the Kullback-Leibler distance.

Item Type:Article
Keywords:Large extra dimensions, Supersymmetry phenomenology, Beyond standard model, Hadronic colliders.
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Record Created:08 May 2008
Last Modified:17 Jun 2015 12:02

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