Title: Probing New Physics Effects on the Radiation Amplitude Zero at the LHC

Abstract: The angular distributions of $W+V0$ production posses a feature known as the Radiation Amplitude Zero (RAZ). For $V0 = \gamma$, at the RAZ the differential cross section is between 2 and 4 orders of magnitude smaller than in the other angular regions. This makes the W$\gamma$ RAZ an interesting low-background corner to search for new physics. For $V0 = Z$, the RAZ is mostly populated by the longitudinal components of the vector bosons. This makes the WZ RAZ an interesting window to probe higher dimensional operators involving the longitudinal components of the vector bosons that posses the interesting growing-with-energy feature. In this talk, we explore the impact of higher-dimensional operators and a model with Quirks on the RAZ in both $W+Z/ \gamma$ production at the LHC.

HEP Oct10 Capdevilla flyer