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Amin Abouibrahim

Amin Abouibrahim headshot

Assistant Professor

Physics

College of Arts and Sciences
860.768.4957 D 218 Website: Amin Abouibrahim
Education

PhD, Northeastern University (Boston, MA)

MS, Northeastern University (Boston, MA)

BA, Lebanese University (Lebanon)

Dr. Abouibrahim earned his Ph.D. in Theoretical Particle Physics from Northeastern University in Boston. His research covers areas of theoretical high energy physics (phenomenology and model building) and particle cosmology, where the focus is on studying and understanding the nature of the dark sector of the universe. This sector comprises dark matter and dark energy and potentially other new particles that can have direct or indirect interactions with the visible sector. These interactions (whether weak-scale size or feeble in nature) may impact several observables that can be searched for in current and future experiments.

His current research addresses the origins of the recent cosmological tensions between late-time and early-time measurements of some quantities, mainly, the Hubble parameter, which is a measure of the rate at which the universe is expanding. Dr. Abouibrahim’s work in cosmology consists of trying to find a field-theoretic model as an alternative to the concordance LCDM model. His research employs advanced statistical techniques, including Markov Chain Monte Carlo simulations and Bayesian inference, to extract cosmological parameters based on the latest cosmological data. The use of a high-performance computing cluster is integral to his research.

Before his doctoral studies, Dr. Abouibrahim served as Chair of the Physics Department at SABIS International School in Lebanon, where he taught for nine years. With over 20 years of experience in education, he remains passionate about teaching and student success. His teaching interests span topics such as Electromagnetism, Quantum Mechanics, and Elementary Particle Physics. Students interested in getting a first-hand research experience in particle physics and cosmology are encouraged to join his research group, where they can engage in theoretical modeling, computational analysis, or both.

  • Postdoctoral researcher (2020 – 2023): Institute for theoretical physics, University of Muenster, Germany
  • Visiting Assistant Professor of Physics and Astronomy (2023 – 2025): Union College, Schenectady, NY
  • Di Valentino et al. [CosmoVerse Network], The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics, Phys. Dark Univ. 49, 101965 (2025)
  • Aboubrahim and P. Nath, Upper limits on dark energy-dark matter interaction from DESI DR2 in a field-theoretic analysis, [arXiv:2411.11177 [astro-ph.CO]]
  • Aboubrahim and P. Nath, Interacting ultralight dark matter and dark energy and fits to cosmological data in a field theory approach, JCAP 09, 076 (2024)
  • Aboubrahim, M. Klasen and L.P. Wiggering, Forbidden dark matter annihilation into leptons with full collision terms, JCAP 08, 075 (2023)
  • Aboubrahim, M.M. Altakach, M. Klasen, P. Nath and Z.Y. Wang, Combined constraints on dark photons and discovery prospects at the LHC and the Forward Physics Facility, JHEP 03, 182 (2023)
  • Aboubrahim and P. Nath, A tower of hidden sectors: a general treatment and physics implications, JHEP 09, 084 (2022)
  • Abdalla et al., Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies, JHEAp 34, 49-211 (2022)
  • Aboubrahim, M. Klasen and P. Nath, Analyzing the Hubble tension through hidden sector dynamics in the early universe, JCAP 04, no.04, 042 (2022)
  • Aboubrahim, M. Klasen, P. Nath and R.M. Syed, Tests of gluino-driven radiative breaking of the electroweak symmetry at the LHC, Phys. Scripta 97, no.5, 054002 (2022)
  • Aboubrahim, P. Nath and Z.Y. Wang, A cosmologically consistent millicharged dark matter solution to the EDGES anomaly of possible string theory origin, JHEP 12, 148 (2021)
  • Aboubrahim, P. Nath and R.M. Syed, Yukawa coupling unification in an SO(10) model consistent with Fermilab g–2 result, JHEP 06, 002 (2021)
  • Aboubrahim, M. Klasen and P. Nath, What the Fermilab muon g–2 experiment tells us about discovering supersymmetry at high luminosity and high energy upgrades to the LHC, Phys. Rev. D 104, no.3, 035039 (2021)
  • Aboubrahim, W.Z. Feng, P. Nath and Z.Y. Wang, A multi-temperature universe can allow a sub-MeV dark photon dark matter, JHEP 06, 086 (2021)
  • Aboubrahim, T. Ibrahim, M. Klasen and P. Nath, A decaying neutralino as dark matter and its gamma ray spectrum, Eur. Phys. J. C 81, no.8, 680 (2021)
  • Aboubrahim, M. Klasen and P. Nath, Xenon-1T excess as a possible signal of a sub-GeV hidden sector dark matter, JHEP 02, 229 (2021)
  • Aboubrahim, W.Z. Feng, P. Nath and Z.Y. Wang, Self-interacting hidden sector dark matter, small scale galaxy structure anomalies, and a dark force, Phys. Rev. D 103, no.7, 075014 (2021)
  • Aboubrahim, P. Nath and R.M. Syed, Corrections to Yukawa couplings from higher dimensional operators in a natural SUSY SO(10) and HL-LHC implications, JHEP 01, 047 (2021)
  • Aboubrahim, W.Z. Feng and P. Nath, Expanding the parameter space of natural supersymmetry, JHEP 04, 144 (2020)