Addendum to "Distinguishing Spins in Decay Chains at the Large Hadron Collider"
Abstract
We extend our earlier study of spin correlations in the decay chain $D\to C q$, $C\to B l^{near}$, $B\to A l^{far}$, where $A,B,C,D$ are new particles with known masses but undetermined spins, $l^{near}$ and $l^{far}$ are opposite-sign same-flavour charged leptons and $A$ is invisible. Instead of looking at the observable 2- and 3-particle invariant mass distributions separately, we compare the full three-dimensional phase space distributions for all possible spin assignments of the new particles, and show that this enhances their distinguishability using a quantitative measure known as the Kullback-Leibler distance.
- Publication:
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arXiv e-prints
- Pub Date:
- June 2006
- DOI:
- 10.48550/arXiv.hep-ph/0606212
- arXiv:
- arXiv:hep-ph/0606212
- Bibcode:
- 2006hep.ph....6212A
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 5 pages, no figures