6533b836fe1ef96bd12a1363
RESEARCH PRODUCT
The Z boson spin observables as messengers of new physics
A. SegarraA. SegarraJose BernabeuJose BernabeuVasiliki A MitsouJuan Antonio Aguilar Saavedrasubject
Particle physicsPhysics and Astronomy (miscellaneous)Physics beyond the Standard ModelFOS: Physical scienceslcsh:Astrophysics01 natural sciencesResonance (particle physics)Light Supersymmetric ParticleHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)Standard Model Predictionlcsh:QB460-4660103 physical scienceslcsh:Nuclear and particle physics. Atomic energy. Radioactivity010306 general physicsEngineering (miscellaneous)Spin-½BosonCondensed Matter::Quantum GasesPhysicsLarge Hadron Collider010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyAngular DistributionCharged LeptonObservable3. Good healthHigh Energy Physics - PhenomenologyLarge Hadron Colliderlcsh:QC770-798High Energy Physics::ExperimentMultipole expansionLeptondescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-04-12 | The European Physical Journal C |