Alexandre Sakharov

My curent research interests lie in the emerging field of multimessenger astronomy, which has been significantly advanced by the recent discovery of gravitational waves and high-energy cosmic neutrinos. The exploration of the Universe using these new messengers, alongside electromagnetic radiation and cosmic rays, offers unprecedented insights into the most energetic and extreme cosmic events and environments. My focus is on studying the mechanisms behind particle acceleration and the formation of astrophysical objects, such as galaxies with accreting supermassive black holes, collapsing stars, and coalescing stellar black holes. This new era of multimessenger astronomy holds the potential to deepen our understanding of the Universe’s most dynamic and powerful phenomena.

Education

Ph.D. in Theoretical and Mathematical Physics, National Research Nuclear University MEPhI, Russia

M.S. in Experimental Nuclear Physics, National Research Nuclear University MEPhI, Russia

B.S., Faculty of Physics, Tbilisi State University, Georgia (USSR)

Research

My research interests span the fields of particle physics, cosmology, and astrophysics. I focus on exploring the mechanisms driving the evolution of the Universe, from its earliest stages to the formation of present-day macroscopic structures and individual astrophysical objects. This includes precision testing of fundamental forces of nature through data analysis from high-energy astrophysical observations, gravitational wave astronomy, and experiments at the Large Hadron Collider (LHC). Additionally, I am interested in contributing to the development, commissioning, and performance optimization of cutting-edge high-energy physics detector systems.

Publications and Scholarly Activities
Sellected Publications
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M. Bustamante, J. Ellis, R. Konoplich and A.S. Sakharov,
``Probing Lorentz invariance with a high-energy neutrino flare,''
e-Print: 2408.15949 [astro-ph.HE]
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A.A. Popov, S.G. Rubin and A.S. Sakharov,
``Primordial Black Holes from Spatially Varying Cosmological Constant Induced by Field Fluctuations in Extra Dimensions,''
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Universe 2024, 10(4), 166; https://doi.org/10.3390/universe10040166
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A.G. Bagdatova, S.P. Baranov and A.S. Sakharov,
``Study of exclusive two-body W decays with fully reconstructible kinematics,''
Mod.Phys.Lett.A 38 (2023) 14n15, 2350073 https://doi.org/10.1142/S0217732323500736.
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Y. Chen, C.H. Lin, M. Liu, A.S. Sakharov, J. Ulbricht and J. Zhao,
`Is the Non-Pointness of the Electron Observable in  $e^{+} e^{-}$ Annihilation at Center-of-Mass Energies 55–207 GeV?,''
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Physics 2023, 5(3), 752-783; https://doi.org/10.3390/physics5030048
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M. Chitishvili, M. Gogberashvili, R. Konoplich and A.S. Sakharov,
``Higgs Field-Induced Triboluminescence in Binary Black Hole Mergers,''
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Universe 2023, 9(7), 301; https://doi.org/10.3390/universe9070301

A.S. Sakharov, Y.N. Eroshenko and S.G. Rubin, ``Looking at the NANOGrav signal through the anthropic window of axionlike particles,'' Phys. Rev. D104 (2021) no.4, 043005

A.S. Sakharov and K. Zhukov ``Study of an Air Curtain in the Context of Individual Protection from Exposure to Coronavirus (SARS-CoV-2) Contained in Cough-Generated Fluid Particles,'' Physics 2020, 2(3), 340-351; https://doi.org/10.3390/physics2030018

R. Beradze, M. Gogberashvili and A.S. Sakharov, ``Binary Neutron Star Mergers with Missing Electromagnetic Counterparts as Manifestations of Mirror World,'' Phys. Lett. B804 (2020), 135402

J. Ellis, R. Konoplich, N.E. Mavromatos, L. Nguyen, A.S. Sakharov and E.K. Sarkisyan-Grinbaum, ``Robust Constraint on Lorentz Violation Using Fermi-LAT Gamma-Ray Burst Data'', Phys. Rev. D99 (2019) no.8, 083009

J. Ellis, N.E. Mavromatos, A.S. Sakharov and E.K. Sarkisyan-Grinbaum, ``Limits on Neutrino Lorentz Violation from Multimessenger Observations of TXS 0506+056'', Phys. Lett. B789 (2019) 352

M. Gogberashvili and A .S. Sakharov, ``Supplying Dark Energy from Scalar Field Dark Matter'', Int. J. Mod. Phys. D27 (2018) no.09, 1850100

L. Bonetti, J. Ellis, N. E. Mavromatos, A .S. Sakharov, E. K. Sarkisyan-Grinbaum and A. D. A. M. Spallicci, ``FRB 121102 Casts New Light on the Photon Mass'', Phys. Lett. B768 (2017) 326

E. K. G. Sarkisyan, A. N. Mishra, R. Sahoo and A .S. Sakharov, ``Centrality dependence of midrapidity density from GeV to TeV heavy-ion collisions in the effective-energy universality picture of hadroproduction,'' Phys. Rev. D94 (2016) no.1, 011501

M. Gogberashvili, A .S. Sakharov and E.K.G. Sarkisyan-Grinbaum, ``Size of Shell Universe in Light of Fermi GBM Transient Associated with GW150914'', Phys. Lett. B763 (2016) 397

Within CMS Collaboration, ``Search for Higgs boson off-shell production in proton-proton collisions at 7 and 8 TeV and derivation of constraints on its total decay width'' , JHEP 1609 (2016) 051

Within CMS Collaboration, ``The performance of the CMS muon detector in proton-proton collisions at \sqrt(s) = 7 TeV at the LHC'', JINST 8 (2013) P11002

J. R. Ellis, N. Harries, A. Meregaglia, A. Rubbia and A.S. Sakharov, "Probes of Lorentz Violation in Neutrino Propagation", Phys. Rev. D78 (2008) 033013

J.R. Ellis, N.E. Mavromatos, D.V. Nanopoulos, A.S. Sakharov and E.K.G. Sarkisyan, "Robust Limits on Lorentz Violation from Gamma-Ray Bursts", Astropart. Phys. 25 (2006) 402

J.R. Ellis, N.E. Mavromatos, D.V. Nanopoulos and A.S. Sakharov, ``Synchrotron radiation and quantum gravity'', Nature 428 (2004) 386

J.R. Ellis, N.E. Mavromatos, D.V. Nanopoulos and A.S. Sakharov, ``Quantum-gravity analysis of gamma-ray bursts using wavelets'', Astron. Astrophys. 402 (2003) 409

M.Y. Khlopov, S.G. Rubin and A.S. Sakharov, "Possible origin of antimatter regions in the baryon dominated universe", Phys. Rev. D62 (2000) 083505

R.V. Konoplich, S.G. Rubin, A.S. Sakharov and M.Y. Khlopov, ``Formation of black holes in first-order phase transitions as a cosmological test of symmetry-breaking mechanisms'', Phys. Atom. Nucl. 62 (1999) 1593

Professional Experience and Memberships

Experimental Physics Department (ATLAS experiment at LHC), CERN, Switzerland

Department of Physics, New York University, New York, USA

Experimental Physics Department (CMS experiment at LHC), CERN, Switzerland

Department of Physics and Astronomy, Wayne State University (WSU), Detroit, USA

LNGS - Gran Sasso National Laboratory, Italy

Institute for Particle Physics, Swiss Federal Institute of Technology ETH Zurich, Switzerland

High Energy Physics Department, Moscow State Engineering Physics Institute (Technical University), Moscow, Russia

Honors, Awards, and Grants
Ministry of Science and Technical Policy (Russia)
Soros Foundation (Russia, USA)
National Science Foundation (USA)

Visiting Research Professor, Physics

Education