Dimitris Fassouliotis is Professor at the Department of Physics, National and Kapodistrian University of Athens specializing in Experimental Elementary Particle Physics.

Education

  • Bachelor degree in Electronic Engineering, National Technical University of Athens, 1989
  • Post Graduate courses in Particle Physics, N.C.S.R. Democritos Athens, 1989-1990
  • Ph.D in Experimental Particle Physics, National Technical University of Athens, April 1994
  • Didactics qualification certificate, PA.TE.S Athens, 1995

Research interests

Prof. Fassouliotis has focussed on collider experiments at CERN. He was a member of the DELPHI collaboration at LEP and since 1998 he is a member of the ATLAS collaboration at LHC. In DELPHI he mainly performed precise electro-weak measurements to verify the validity of the Standard model (SM) of elementary particles and discover traces for physics beyond SM. In ATLAS he participated in the construction of the muon spectrometer and its upgrade, the discovery of the Higgs boson and the search for new heavy bosons predicted in a variety of theoretical models aiming to discover new physics beyond the SM. He is currently focused on the development of new techniques in the domain of gas mirco-pattern detectors and the precise measurements of the Higgs boson properties at LHC.

Short Bio

Prof. Fassouliotis became a member of the DELPHI collaboration at 1989. During his PhD he studied the J/ψ and strange hadron production in the Z boson decays. As a post-doctoral researcher at INFN Trieste, and later on, at NCSR Demokritos he actively participated at the search for meta-stable supersymmetric charged particles, the measurement and interpretation of the Z line shape above the Z pole, the W mass measurement and the measurement of the trillinear gauge boson coupling WWV (V=Z or γ). He has presented DELPHI and LEP results in several international conferences.    

Prof. Fassouliotis became a member of the ATLAS collaboration at 1998. He participated in the construction of 30000 drift tubes in Athens for ATLAS the muon spectrometer, as well as the integration of the corresponding muon chambers (BIS). He participated in the construction of the software for the muon reconstruction in ATLAS and had multiple contributions to the studies for the estimation of the Expected Performance of the ATLAS Experiment, before the start of LHC.
Using the LHC data, he participated in the search for BSM heavy gauge bosons, but he mainly focused on the search for the Higgs boson. After its discovery he participated in the measurement of its properties. In parallel, he participated in the R&D of the resistive Micromegas detectors for the upgrade of the muon spectrometer and their commissioning. He has presented ATLAS results in several international conferences.

He was the main supervisor of four PhD, seven MSc and twenty one undergraduate theses and has been member of the advisory committees in several other cases.


Selected publications

  • The ATLAS Collaboration,"Measurement of the H->γγ and H->ZZ*->4ℓ cross-sections in pp collisions at sqrt(s)=13.6 TeV with the ATLAS detector", Eur. Phys. J. C 84 (2024) 78
  • The ATLAS Collaboration, "Evidence of off-shell Higgs boson production from ZZ leptonic decay channels and constraints on its total width with the ATLAS detector", Phys. Lett. B 846 (2023) 138223
  • The ATLAS Collaboration, "Search for heavy resonances decaying into a pair of bosons in the final states l+l-l'+l'- and l+l-νν using 139 fb-1 of proton-proton collisions at 13 TeV with the ATLAS detector",Eur. Phys. J. C 81 (2021) 332
  • The ATLAS Collaboration, “Higgs boson production cross-section measurements and their EFT interpretation in the 4ℓdecay channel at √s=13 TeV with the ATLAS detector”,  Eur. Phys. J. C 80 (2020) 957.
  • The ATLAS Collaboration, “Search for an additional, heavy Higgs boson in the H→ZZ decay channel at √s = 8 TeV  in pp collision data with the ATLAS detector”, Eur. Phys. J. C76 (2016) 45.
  • The ATLAS Collaboration, “Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector”, Phys. Rev. D 91 (2015) 012006.
  • The ATLAS Collaboration, “Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC”, Phys. Lett. B 716 (2012) 1-29.
  • The ATLAS Collaboration,  “Search for the Standard Model Higgs boson in the decay channel HàZZ(*)à4l with 4.8 fb-1 of pp collisions at sqrt(s)=7 TeV with ATLAS”,  Phys.Lett. B710 (2012) 383-402.
  • The ATLAS Collaboration, “Search for a heavy gauge boson decaying to a charged lepton and a neutrino in 1 fb-1 of pp collisions at sqrt(s) = 7 TeV using the ATLAS detector”, Phys.Lett. B705 (2011) 28-46.
  • The DELPHI Collaboration, “Measurements of CP-conserving Trilinear Gauge Boson CouplingsWWV(V = γ,Z) in e+e- Collisions at LEP2", Eur. Phys. J. C 66, 35 (2010).
  • The DELPHI Collaboration, “Measurement and interpretation of the W pair cross-section in e+e- interactions at 161-GeV", Phys. Lett. B 397, 158 (1997).
  • The DELPHI Collaboration, “Measurement of event shape and inclusive distributions at S**(1/2) = 130-GeV and 136-GeV", Z. Phys. C 73, 229 (1997).
  • The DELPHI Collaboration, “J / psi production in the hadronic decays of the Z", Phys. Lett. B 341, 109 (1994).
  Full list of Publications