Sergey Sibiryakov profile picture

McMaster University

Research Associate Faculty

Areas of research: Cosmologie Physique des Particules

Overview
My research lies in the interface of quantum field theory, particle physics, gravitation and cosmology. I'm interested in understanding the fundamental principles underlying the laws of Nature, the interplay between them and the ways to test them. Despite the impressive success of the Standard Model of particle physics (SM) and Einstein’s General Relativity (GR), there are multiple reasons to believe that they are incomplete. Here are the questions shaping my research: What are dark matter and dark energy made of? How can we test various hypotheses from observations? What information is carried by the distribution of galaxies in the universe? What are the key features of quantum gravity? What are implications of quantum gravity for the physics of other fundamental forces?
Teaching Affiliations
If you are interested in pursuing a MSc degree, please apply to the Perimeter Scholars International (PSI) masters program. If you are interested in working with me as a PhD student, please submit an application directly to my department at the McMaster University and indicate that you would like to be supervised by me. Perimeter Institute is committed to diversity within its community and I welcome applications from underrepresented groups.
Research Interests
Particle physics, cosmology, classical and quantum gravity, quantum field theory
Positions Held
  • Scientist, Institute of Physics, Ecole polytechnique federale de Lausanne (EPFL), 2013-2020
  • Scientific staff member, Theoretical Physics Department, CERN, 2013-2020
  • Senior Researcher, Institute for Nuclear Research of the Russian Academy of Sciences, 2010-2022
  • Researcher, Laboratory of Particle Physics and Cosmology, Institute of Theoretical Physics, Ecole polytechnique federale de Lausanne (EPFL), 2008-2010
  • Postdoctoral Fellow, Theory Division, Physics Department, CERN, 2006-2008
  • Junior Researcher, Institute for Nuclear Research of the Russian Academy of Sciences, 2004-2008
Awards
  • Discovery Grant, Dynamics and Signatures of New Physics, Natural Sciences and Engineering Research Council of Canada (NSERC), 2021-2026
  • The Best Scientific Work in Physics, Russian Academy of Sciences, 2010
Recent Publications
  • Fedderke, M. A., & Sibiryakov, S. (2025). Picolensing as a probe of primordial black hole dark matter. Physical Review D, 111(6), 063060. doi:10.1103/physrevd.111.063060
  • Kovachik, A., & Sibiryakov, S. (2025). Slowly moving black holes in khronometric model. Physical Review D, 111(4), 044042. doi:10.1103/physrevd.111.044042
  • Barvinsky, A. O., Kurov, A. V., & Sibiryakov, S. M. (2025). Renormalization group flow of projectable Horava gravity in (3+1) dimensions. Physical Review D, 111(2), 024030. doi:10.1103/physrevd.111.024030
  • Pîrvu, D., Shkerin, A., & Sibiryakov, S. (2024). Thermal false vacuum decay in (1+1) dimensions: Evidence for nonequilibrium dynamics. International Journal of Modern Physics A, 39(34), 2445007. doi:10.1142/s0217751x24450076
  • Barvinsky, A. O., Kurov, A. V., & Sibiryakov, S. M. (2024). Renormalization group flow of projectable Horava gravity in (3+1) dimensions. doi:10.48550/arxiv.2411.13574
  • Pîrvu, D., Johnson, M. C., & Sibiryakov, S. (n.d.). Bubble velocities and oscillon precursors in first-order phase transitions. Journal of High Energy Physics, 2024(11), 64. doi:10.1007/jhep11(2024)064
  • Pîrvu, D., Shkerin, A., & Sibiryakov, S. (2024). Thermal false vacuum decay in (1+1)-dimensions: Evidence for non-equilibrium dynamics. doi:10.48550/arxiv.2408.06411
  • Pîrvu, D., Shkerin, A., & Sibiryakov, S. (2024). Thermal False Vacuum Decay Is Not What It Seems. doi:10.48550/arxiv.2407.06263
  • Besharat, A., Radkovski, J., & Sibiryakov, S. (2024). Effective action for dissipative and nonholonomic systems. Physical Review E, 109(5), l052103. doi:10.1103/physreve.109.l052103
  • Chan, J. H. -H., Sibiryakov, S., & Xue, W. (n.d.). Condensation and evaporation of boson stars. Journal of High Energy Physics, 2024(1), 71. doi:10.1007/jhep01(2024)071
  • Barvinsky, A. O., Kurov, A. V., & Sibiryakov, S. M. (2023). Asymptotic freedom in (3+1)-dimensional projectable Horava gravity: Connecting the ultraviolet and infrared domains. Physical Review D, 108(12), l121503. doi:10.1103/physrevd.108.l121503
  • Kovachik, A., & Sibiryakov, S. (2023). Slowly moving black holes in khrono-metric model. doi:10.48550/arxiv.2311.12936
  • Besharat, A., Radkovski, J., & Sibiryakov, S. (2023). Effective Action for Dissipative and Nonholonomic Systems. doi:10.48550/arxiv.2308.08695
  • Radkovski, J. I., & Sibiryakov, S. M. (2023). Scattering amplitudes in high-energy limit of projectable Horava gravity. Physical Review D, 108(4), 046017. doi:10.1103/physrevd.108.046017
  • Chan, J. H. -H., Sibiryakov, S., & Xue, W. (n.d.). Boson star normal modes. Journal of High Energy Physics, 2023(8), 45. doi:10.1007/jhep08(2023)045
  • Chudaykin, A., Ivanov, M. M., & Sibiryakov, S. (2023). Renormalizing one-point probability distribution function for cosmological counts in cells. Journal of Cosmology and Astroparticle Physics, 2023(08), 079. doi:10.1088/1475-7516/2023/08/079
  • Radkovski, J. I., & Sibiryakov, S. M. (2023). Scattering amplitudes in high-energy limit of projectable Horava gravity. doi:10.48550/arxiv.2306.00102
  • Chan, J. H. -H., Sibiryakov, S., & Xue, W. (2023). Boson Star Normal Modes. doi:10.48550/arxiv.2304.13054
  • Chudaykin, A., Ivanov, M. M., & Sibiryakov, S. (2022). Renormalizing one-point probability distribution function for cosmological counts in cells. doi:10.48550/arxiv.2212.09799
  • Briaud, V., Shkerin, A., & Sibiryakov, S. (2022). Thermal false vacuum decay around black holes. Physical Review D, 106(12), 125001. doi:10.1103/physrevd.106.125001
  • Shkerin, A., & Sibiryakov, S. (n.d.). Black hole induced false vacuum decay: the role of greybody factors. Journal of High Energy Physics, 2022(8), 161. doi:10.1007/jhep08(2022)161
  • Chan, J. H. -H., Sibiryakov, S., & Xue, W. (2022). Condensation and Evaporation of Boson Stars. doi:10.48550/arxiv.2207.04057
  • Barvinsky, A. O., Kurov, A. V., & Sibiryakov, S. M. (2022). Beta functions of (3+1)-dimensional projectable Horava gravity. Physical Review D, 105(4), 044009. doi:10.1103/physrevd.105.044009
Seminars
  • Theoretical status of Horava gravity, 50 Years of Horndeski Gravity: Exploring Modified Gravity, 2024/07/18, PIRSA:24070075
  • Quantum Field Theory in Curved Spacetime (PM) - 2023-03-31, Quantum Field Theory in Curved Spacetime, 2023/03/31, PIRSA:23030098
  • Quantum Field Theory in Curved Spacetime (PM) - 2023-03-24, Quantum Field Theory in Curved Spacetime, 2023/03/24, PIRSA:23030097
  • Quantum Field Theory in Curved Spacetime (PM) - 2023-03-17, Quantum Field Theory in Curved Spacetime, 2023/03/17, PIRSA:23030096
  • Quantum Field Theory in Curved Spacetime (PM) - 2023-03-10, Quantum Field Theory in Curved Spacetime, 2023/03/10, PIRSA:23030095
  • Status update on Horava gravity, 2023/03/08
  • Quantum Field Theory in Curved Spacetime (AM) - 2023-03-03, Quantum Field Theory in Curved Spacetime, 2023/03/03, PIRSA:23030088
  • Quantum Field Theory in Curved Spacetime (PM) - 2023-03-03, Quantum Field Theory in Curved Spacetime, 2023/03/03, PIRSA:23030094
  • Condensation and Evaporation of Boson Stars, University of Minnesota, Minneapolis, United States, 2022/11/11
  • On thermal false vacuum decay around black holes, 2022/09/14
  • Condensation and Evaporation of Boson Stars, McGill University, Montreal, Canada, 2022/09/12
  • Black hole catalysis of false vacuum decay from first principles, HECAP Seminar, ICTP, Trieste, Italy (online), 2022/07/26