J. A. Aguilar-Saavedra, J. Bernabéu, V. A. Mitsou, A. Segarra
Published 2017-01-11Version 1
We demonstrate that the 8 multipole parameters describing the spin state of the $Z$ boson are able to disentangle known $Z$ production mechanisms and signals from new physics at the LHC. They can be extracted from appropriate asymmetries in the angular distribution of lepton pairs from the $Z$ boson decay. The power of this analysis is illustrated by (i) the production of $Z$ boson plus jets; (ii) $Z$ boson plus missing transverse energy; (iii) $W$ and $Z$ bosons originating from the two-body decay of a heavy resonance.
The W and Z boson spin observables as messengers of new physics at LHC
A theorem about two-body decay and its application for a doubly-charged boson $H^{\pm\pm}$ going to $τ^{\pm}τ^{\pm}$
Breaking down the entire W boson spin observables from its decay
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