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Costas Andreopoulos

Welcome to my home page!

I am a Chair of Experimental Particle Physics at the Department of Physics of the University of Liverpool, and a Scientist at the Particle Physics Department of the Rutherford Appleton Laboratory operated by the Science & Technology Facilities Council (STFC), part of UK Research and Innovation (UKRI).

I study one of the most extraordinary, weird, mysterious characters in our universe: the Neutrino! I perform precision measurements of neutrino interactions and neutrino oscillations to uncover new physics and investigate the origin of matter-antimatter asymmetry in the universe.

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Portfolio of activities:

I am centrally involved in preparations for the physics exploitation of the Fermilab Short-Baseline Neutrino (SBN) Programme. This is a leading experimental programme with the sensitivity to perform a definitive 5σ test of the light-sterile neutrino hypothesis associated with several long-standing experimental anomalies. Its superb sensitivity is enabled by the Liquid Argon Time Projection Chamber (LArTPC) technology and the use of 2 detectors at different baselines: SBND (112-t active mass) 110 m away from the neutrino beam target, and ICARUS (476-t) 600 m away. I serve as SBND Physics co-Coordinator, and as Systematics & Oscillation Sensitivity WG co-Coordinator for the overall SBN programme. I lead the development of a simultaneous sterile neutrino oscillation and systematics constraint fit for SBN, as well as preparations for SBND neutrino cross-section measurements of unprecedented precision. I also have a keen interest on Machine Learning, and my group prototypes novel Deep Learning methods for LArTPC neutrino event reconstruction.

I serve as the DUNE-UK Physics Work Package Coordinator and I am involved in R&D for the DUNE experiment in US - the world's next flagship neutrino experiment. I led analyses for the derivation of physics-driven requirements for the experiment optimization and advanced analyses for the evaluation of different design options. With the VALOR group, I delivered the first-ever oscillation sensitivity calculations from an end-to-end analysis using full event simulation and reconstruction.

I am a member of the T2K experiment in Japan where, over the past decade, I performed electron (anti-)neutrino appearance searches and precision measurements of muon (anti-)neutrino disappearance, and produced the first direct evidence for neutrino CP violation. I lead the activities of the VALOR fitting group which has been one of the main driving forces in the overall T2K physics exploitation effort (details here).

I am one of the main authors of GENIE, and co-spokesperson of the international GENIE collaboration. GENIE is the most commonly used neutrino interaction physics simulation: It provides a bridge between theory and measurement and it plays a crucial role throughout the lifecycle of every experiment. I also serve as the Systematics & Tuning WG Coordinator and my effort is focussed on developing a leading global analysis of neutrino scattering data and improved generator tunes. Or main goal for the next 5 years is to build well-motivated models of neutrino-nucleus interactions and perform a global meta-analysis of all SBN measurements of neutrino interaction characteristics, in order to produce an Argon tune for the early DUNE physics exploitation programme.

I am one of the main authors and coordinator of the VALOR neutrino fitting group. The group plays a central role in the T2K oscillation analysis effort, in preparations for the exploitation of the Fermilab SBN programme, as well as in sensitivity studies and the optimization of the Hyper-Kamiokande and DUNE experiments.

My group develops novel Deep Learning applications for the reconstruction and classification of neutrino events recorded in Liquid Argon Time Projection Chamber (LArTPC) detectors, with particular emphasis in the physics exploitation of SBND data. Currently the group is focussing on instance-aware semantic segmentation applications for the reconstruction of exclusive final states.

My group collaborates with GMV Innovating Solutions, a large technology company headquartered in Spain with a UK subsidiary in the Harwell Oxford campus near RAL, on a preliminary exploration of the innovative and disrupting technological concept of Positioning, Navigation and Timing (PNT) applications based on neutrinos. This work is aimed at applications where the Global Navigation Satellite System (GNSS) can not work, such as i) submarine navigation, ii) navigation in the Earth poles, where no GNSS satellites are in view, iii) indoor positioning for big machines, for example for tunnels construction, or iv) mining applications. This work is funded by the European Space Agency (ESA).

I am passionate about teaching Physics at all levels, either on an one-to-one basis or in large lecture theatres. At Liverpool, I teach both core modules in classes of more than 100 students and in small tutorial groups. I also have had the privilege to direct the work of several brilliant PhD students, whose PhD dissertations presented world-leading results.