Search for new physics at the Compact Linear Collider

Abstract

In this work, we first review the fundamental aspects of the Standard Model of electroweak interactions, addressing theoretical foundations such as the importance of gauge symmetries and spontaneous symmetry breaking in the generation of particle masses and the emergence of interactions between fermions and gauge bosons. We then advance to Physics Beyond the Standard Model within the scope of collider physics, motivated by future planned colliders, particularly the Compact Linear Collider (CLIC). Our objective is to estimate the CLIC’s capability to discover a new massive vector boson, a leptophilic Z’. To this end, we perform simulations of electron-positron collisions at the CLIC for both signal and background events as functions of certain kinematic variables and implement cuts that enhance the signal-tobackground ratio. From this, we conclude that the CLIC has a high potential to discover a leptophilic Z’ with masses up to 3 TeV with less than 10 f b−1 of integrated luminosity, and a Z’ with a mass of 5 TeV with an integrated luminosity of 1000 f b−1. Our work underscores the CLIC’s capability to achieve significant sensitivities in the detection of a Z’ vector boson and to establish the existence of a new fundamental force in nature.