Research

This page gives short introductions to the areas of my research interests.
If you are already familiar with these, please go directly to Research Highlights.

Standard Model of Particle Physics

The Standard Model of particle physics is the best description of fundamental interactions we have so far--
it explains the strong, weak, and electromagnetic interactions very well, and fits almost all the data.

Beyond the Standard Model

Still, we know that the Standard Model is incomplete. It does not explain neutrino masses, cannot account for the matter-antimatter asymmetry, and has no clue about Dark Matter or Dark Energy.

So there is some Physics beyond the Standard Model. But what kind of physics ? Theorists make educated guesses and experimentalists test these at the particle accelerators.

Particle physics at the Colliders

Colliding protons or electrons against each other at high energies allows the creation of heavier particles, through the conversion of energy into mass. These particles are often very short-lived, but the study of their properties leads to the understanding of fundamental interactions.

My focus is on the study of processes that involve the "b" quark in the figure above -- the "bottom" quark, or often called as the "beauty" quark. It is five times heavier than the proton, and lives only for a picosecond (a trillionth of a second).
 Neutrino Physics

Neutrinos are some of the most elusive particles in the universe. They are the second most abundant particles in the universe, and trillions of them pass through us every second without us even realizing it. At the same time, they help the sun shine, make stars explode, and allow us to see places from where light cannot reach us.

Neutrinos are part of the Standard Model, however the explanation of the origin of their mass would need some mechanism beyond the Standard Model.

Neutrino oscillation phenomenology

Some of the major unknowns about neutrinos are the values of their absolute masses, the ordering of their masses, whether their interactions are different from antineutrinos, and indeed, whether neutrinos can be their own antiparticles.

The answers to these questions would come from experiments that study neutrino oscillations (their change from one flavour to another). These experiments can also reveal unexpected aspects of physics beyond the Standard Model.


Supernova Neutrinos

The neutrinos produced in the core of Type-II supernovae travel through extreme densities, which affects their flavours. The observation of these neutrinos would give us important clues about the neutrino properties and supernova astrophysics.