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Journal of High Energy Physics Volume 2006 JHEP08(2006) Create an alert RSS this journal

Christiana Athanasiou et al JHEP08(2006)055 doi:10.1088/1126-6708/2006/08/055

Distinguishing spins in decay chains at the large hadron collider

Christiana Athanasiou1, Christopher G. Lester1, Jennifer M. Smillie1 and Bryan R. Webber1

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Abstract References Cited By
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.

 
An erratum page was received on 12 September 2008 and added to the end of the published paper on 1 October 2008.
Keywords

Beyond Standard Model

Hadronic Colliders

Supersymmetry Phenomenology

Extra Large Dimensions

 

E-print Number: hep-ph/0605286

Cited: by |

Refers: to

PACS

12.60.Jv Supersymmetric models

14.65.-q Quarks

12.15.Ff Quark and lepton masses and mixing

14.60.-z Leptons

13.85.-t Hadron-induced high- and super-high-energy interactions (energy>10 GeV)

12.10.-g Unified field theories and models

Subjects

Particle physics and field theory

Dates

Issue 08 (August 2006)

Received 23 June 2006, accepted for publication 24 July 2006

Published 23 August 2006



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