M. Barbi - Research Interest

Research Interest

Introduction

The quest for the ultimate theory which would unify all known forces of the Universe into a unique force is one of the most ambitious and challenging enterprises of the mankind. In the mean time, we thrive to understand Nature with the theoretical and experimental tools available.

The recent observations of neutrino oscillations lead to masses assigned to the different neutrino flavours. These observations are the most outstanding ones to date in this decade, with important implications on the way we perceive the Universe from elementary particle physics to cosmological scales. Face these observations, the Standard Model of Particle Physics has to be modified to accomodate masses for the neutrinos. It might also has implications in supersymmetric models. Supersymmetric particles like neutralinos are, on the other hand, candidates for cold dark matter. The observation of these particles, and the measurement of their cross-section, can be used in the framework of the minimal Supergravity (mSUGRA) model to compute the relic density of the Universe. This density can be compared to that measured using the Cosmic Microwave Background (CMBR) such that the contribution of the supersymmetric particles to the overall cold dark matter can be evaluated.

The connection between particle physics and cosmology is the focus of my current research interest. For this purpose, I have been contributing to the R&D of the T2K and ILC experiments with intention of performing physics analyses with the data collected by these detectors.

The T2K Project

In Regina, our group is part of the T2K collaboration to build a long baseline neutrino experiment. The objective of this experiment, the T2K, is to observe and measure some of the neutrino properties for the first time, and other neutrino properties with unprecedented accuracy including the neutrino mixing angles, the masses difference between the different neutrino flavours, and a non-vanishing CP-violation phase. In T2K, we play a leading role as responsibles for part of the Fine Grained Detector (FGD) which is one of the components of the Near Detector (ND280) of the T2K experiment. We also play a key role in the preparation for the physics analysis and software development.

The ILC Project

Our group is also a member of the CALICE Collaboration to build the calorimetric system for the International Linear Collider (ILC), and is part of the ILC Canada group. Together with the Large Hadron Collider (LHC), the ILC will be the most important High Energy Physics project in the next two decades. If the Higgs bosons exist, the ILC will measure their properties with accuracy beyond that achieved with the LHC experiments. The energies provided by ILC will also allow searches for supersymmetric and other exotic particles. In Regina, we are interested in searches for dark matter and supersymmetric particles with the ILC. We are also involved in the R&D of the Analog Hadronic Calorimeter (AHCAL).

Past Activities

On my past activities, I was involved in the GlueX Collaboration until the first half of 2006. In GlueX, I played a leading role in tests using silicon photomultipliers (SiPM) and in establishing the first version of the GlueX-Barrel Calorimeter reconstruction code. Before GlueX, I was part of the ZEUS Collaboration at DESY for six years (1999 to 2004). During this period I took on several key responsibilities as ZEUS Uranium Scintillator Calorimeter (UCAL) DQM Coordinator and then general UCAL Coordinator, Forward Neutron Calorimeter and Forward Neutron Tracker Coordinator, ZEUS Run Coordinator among other important activities. I also contributed to several physics analysis.

I obtained my Ph.D. degree working at CERN on the DELPHI Collaboration (LEP). I was responsible for the hardware implementation and tests of the Synchroton Radiation Detector (SRD). My thesis consisted also of physics analysis to measure the Michel parameters.