# The origin of mass at the Large Hadron Collider

### Summary

This project aims to investigate various theoretical aspects related to the newly discovered Higgs-like particle and possible new theories behind the electroweak symmetry breaking in light of experiments at the Large Hadron Collider.

### Supervisor(s)

### Research Location

### Program Type

Masters/PHD

### Synopsis

The recent discovery of a new Higgs-like particle at the Large Hadron Collider (LHC) represents a major step forward in our understanding of the origin of mass of elementary particles. However, this discovery is just a beginning what is believed to be an exciting scientific journey through many other breakthrough discoveries in the field. This belief is based on several theoretical considerations, which are highlighting remaining important problems to be understood. Among those problems are:

- Is the newly discovered particle the Higgs boson predicted by the simplest theory known as the Standard Model, or there is more complex theory behind it? This question can be answered by diligent studies of properties of the Higgs-like particles, such as stability of the electroweak vacuum, possible anomalous interactions, spin and CP-parity, etc.
- What guarantees stability of the Higgs boson mass under the quantum corrections? This question maybe resolved within new type of theories, which exhibit new symmetries and particles, such as supersymmetry and scale-invariance. An alternative theoretical possibility is that the origin of mass is related to a new strongly coupled dynamics.
- What is dark matter and can we observe dark matter particles at LHC? How neutrinos are getting their masses? What is the physical mechanism that generates the observed asymmetry between matter and antimatter in the Universe? To answer these questions we also need to study new theoretical models beyond the standard theory. The new particles and interactions motivated by the above theoretical considerations may indeed be discovered at LHC.

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### Keywords

physics, elementary particles, Higgs boson, dark matter, baryogenesis, physics beyond the Standard Model

### Opportunity ID

The opportunity ID for this research opportunity is: **1608**