About
My research focuses on the theory and phenomenology of elementary particle physics and cosmology beyond the Standard Model, including supersymmetry, extra dimensions, and technicolor, together with their connections to Dark Matter.
Building on my earlier studies of various supersymmetric models, I have expanded my work to explore other theories that can explain Dark Matter phenomena, including extra dimensional theories and models with dynamical symmetry breaking such as Technicolor. I am also leading a project that connects collider and cosmological exploration of different Dark Matter models, aiming to establish a solid foundation for uncovering the underlying theory of Dark Matter.
In 2025 I with the as a member of the CMS collaboration at CERN. The prize recognised landmark contributions of the collaboration to precision measurements of the Higgs boson properties at the Large Hadron Collider.
In 2019 I was awarded the as a member of the D0 Collaboration. The prize was conferred for the discovery of the top quark and the detailed measurement of its properties, recognising the landmark work performed at the Fermilab Tevatron.
In 2021, I co authored the textbook together with Prof. Douglas Ross. The book is intended for third and fourth year undergraduate students and aims to strengthen their knowledge of nuclear and particle physics.
I has been working in close contact with experimental collaborations: I am the former member of at (1996-2004) and presently I am the full member of the at since 2007.
I am one of the three developers of the, designed to automate the transition from Lagrangians to cross sections and distributions efficiently. The package is compatible with any Unix platform.
In 2011 I pioneered the project, which was created to facilitate the connection between high energy theory and experiment by providing a platform to store and validate theoretical models and build a dictionary of model signatures.
See the list of my publications: and
Additionally, see a list of some available
Research
Research groups
Research interests
- Theory and phenomenology of elementary particle physics and cosmology beyond the standard model
- Supersymmetry, extra-dimensions and technicolor and their Dark Matter cosmological connections
Research projects
Active projects
Completed projects
Publications
Biography
Professor Alexander Belyaev is a theoretical physicist specialising in Beyond the Standard Model (BSM) physics, collider phenomenology, and dark matter studies. He is a Professor of Physics and Astronomy at the University of Southampton, where he has been a faculty member since 2007. As a member of the CMS collaboration at CERN, he was among the recipients of the 2025 Breakthrough Prize in Fundamental Physics, awarded to the ATLAS and CMS collaborations for their landmark contributions to precision measurements of the Higgs boson and other discoveries at the Large Hadron Collider. He was also awarded the 2019 European Physical Society (EPS) High Energy and Particle Physics Prize as a member of the D0 Collaboration, conferred for the discovery of the top quark and the detailed measurement of its properties, recognising the landmark work performed at the Fermilab Tevatron.
He graduated from Moscow State University in 1993 and obtained his PhD there in 1996. He began his research career at the Skobeltsyn Nuclear Physics Institute, later becoming a visiting researcher with the Fermilab D0 collaboration. He went on to hold research positions at leading institutions, including the Instituto de Fisica Teorica (UNESP), CERN's Theory Division, Florida State University, and Michigan State University.
His research focuses on the theory and phenomenology of elementary particle physics and cosmology beyond the Standard Model, including supersymmetry, extra dimensions, and technicolor, as well as their connections to dark matter. He has worked closely with experimental collaborations, being a former member of the D0 collaboration at Fermilab (1996-2004) and a full member of the CMS collaboration at CERN since 2007.
Alexander is one of the three developers of the CalcHEP package, a computational tool designed to streamline the transition from Lagrangians to cross sections and distributions with a high level of automation. In 2011, he pioneered the High Energy Physics Model Database (HEPMDB), a framework for collecting and exploring BSM models that serves as a bridge between theoretical model building and experimental verification by providing a dictionary of model signatures and reducing computational overhead.
At Southampton, he has led multiple research projects in BSM physics, including recent studies of the vector like fermionic portal connecting a dark SU(2) sector to the Standard Model. His recent research also includes developing a novel quantum tabletop approach to probing Lambda gravity using phononic excitations in a Bose-Einstein condensate, enabling precision laboratory tests of both the Newtonian gravitational potential and the cosmological constant contribution.
He has received substantial research funding and has published extensively in high impact journals. He co authored The Basics of Nuclear and Particle Physics, published by Springer, and remains actively engaged in advancing computational and phenomenological techniques in high energy physics.