Exclusion and Discovery via Drell-Yan in Multi-Z ′ Models

28 Apr 2015, 18:00


WG3 Electroweak Physics and Beyond the Standard Model WG3:Electroweak Physics and Beyond the Standard Model


Juri Fiaschi (University of Southampton)


Di-lepton production at hadron colliders is by far the preferred channel to search for Z ′ bosons. Traditionally, such searches have exploited the Narrow Width Approximation (NWA) for the signal, thereby neglecting the presence of both (Z ′ ) finite width and interference (with the Standard Model) effects. Furthermore, the primary observable used has traditionally been the cross section, potentially enabling the extraction of the Z ′ resonance in the invariant mass of the di-lepton system. Progress has occurred recently though, which has modified the above paradigm. Indeed, it has been established that both finite width and interference effects ought to be taken into account in experimental searches while still retaining the model independent approach ensured by the NWA. We are showing these effects in a Composite Higgs Model scenario, which represent a realistic and well motivated framework that naturally provides a spectrum with multiple Z' bosons.

Primary author

Juri Fiaschi (University of Southampton)

Presentation Materials