Angular distributions probing beyond Standard Models
A Pitt PACC seminar
Abstract: I will discuss the possibility of radiation amplitude zero (RAZ) in different leptoquark scenarios including scalar and vector. The cross-section of the scattering involving a photon in the initial or finalstate can vanish in the visible region of the cosine of the angle w.r.t the finalstate particle in the centre of mass frame. For an electron-photon collider, the position of RAZ depends on the charge, mass of the finalstate particle and the centre of mass energy. However, for an electron-proton collider, where the photon is in the finalstate, such RAZ only depends on the charge of the finalstate particle. A complementary feature in observing such RAZ, between electron-photon and electron-proton, is observed. While RAZ mainly probes the different gauge representations such angular distribution at the LHC can isolate the spin i.e. the scalar and vector leptoquarks. Finally, we will see that angular distribution can also play an important role of complementarity in determining different possible seesaw scenarios in the muonic colliders.