BSM: Extended Scalar Sectors

TL;DR

This paper discusses extensions of the Standard Model's scalar sector with additional spin-zero fields, aiming to address unresolved questions like dark matter and CP-violation through experimental probes such as collider and dark matter experiments.

Contribution

It provides an overview of extended scalar sectors in particle physics, highlighting their potential to solve fundamental problems and the experimental methods to test these theories.

Findings

Extended scalar sectors can introduce dark matter candidates.

New scalar fields may provide sources of CP-violation.

Experimental searches include collider and dark matter experiments.

Abstract

In particle physics the world is described by a function, the Lagrangian. Each of its sectors characterizes the interactions between the particles of the Standard Model (SM). The addition of hypothetical new particles is done by including new terms in the Lagrangian. The scalar or Higgs sector of the SM is built with only one scalar complex field and it is extended by including new spin zero fields. This can help to solve questions that cannot be answered by the SM alone, like introducing dark matter candidates or new sources of CP-violation required to explain the matter-antimatter asymmetry of the universe. The corresponding theories have to be probed experimentally. For the high energy region, the standard tools are collider experiments such as the Large Hadron Collider, or other possible future facilities. Dark matter experiments scrutinize the connection between the visible and the dark world.