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Costas Andreopoulos

Welcome to my home page!

I am a Neutrino Physicist and Professor of Experimental Particle Physics at the Department of Physics of the University of Liverpool.

I study one of the most extraordinary, weird, mysterious characters in our universe: the Neutrino! I perform precision measurements of neutrino oscillations to determine the neutrino mass hierarchy, search for CP violation in the leptonic sector, and hunt for right-handed neutrinos. My research aims to investigate the origin of matter-antimatter asymmetry of the universe, as well as the origin of the neutrino mass.

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More details on my current and past research activities can be found here. Currently, I am mainly active on the following projects:

Recently, I joined (initially as an observer) the Jiangmen Underground Neutrino Observatory (JUNO) in southern China. I am excited by the prospect of using atmospheric neutrinos to enhance the overall JUNO sensitivity (in combination with reactor neutrinos), and help JUNO achieve the first definitive neutrino mass-ordering determination. I work in the modelling of atmospheric neutrino interactions using GENIE, as well as in event reconstruction and the incorporation of atmospheric event samples in a VALOR-based 3-flavour oscillation analysis.

I am centrally involved in preparations for the physics exploitation of the Fermilab Short-Baseline Neutrino (SBN) Programme, in particular in the SBN Near Detector (SBND). I am the Liverpool PI for SBN and SBND, and I served as a member of the SBND Executive Committee (2020-23), SBND Physics co-Coordinator (2017-23), and co-Coordinator of the SBN Systematics & Oscillation Sensitivity WG (2018-22) My research is focussing on exploiting SBND data to characterize neutrino-Argon cross sections.

I am co-spokesperson of the international GENIE collaboration, and one of the main authors of the well-known GENIE neutrino event generator, as well as of the corresponding global analysis of neutrino scattering data informing GENIE tunes. GENIE performs influential phemomenology research in the boundary between nuclear and particle physics, provides a bridge between theory and measurement, and it is a key ingredient in the exploitation effort of many experiments.

I am one of the main authors and coordinator of the VALOR fitting group, that develops the VALOR Software Development Kit (SDK) and takes a lead role in the analysis of data from several neutrino experiments. VALOR sprung from T2K where the VALOR group produced over 20 reviewed oscillation physics analyses and it has contributed to 12 published T2K papers, culminating in the 2020 Nature paper on T2K neutrino CP violation constraints. (Details on the prolific research output of the group can be found in the VALOR web page.) Currently, the group is mostly active on SBN/SBND and JUNO.

Currently, I am entering into the field of Quantum Information Science. I work with scientists from the Fermilab Quantum Institute, and Liverpool PhD students, on a project to use quantum processors for neutrino interaction simulations.