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Christos Vergis

Postdoctoral Research Assistant in Higgs Physics

QUEEN MARY UNIVERSITY OF LONDON

London, Reino Unido

1.ATLAS searches of physics beyond the Standard Model (tau lepton and neutrino) 2.ATLAS searches for Higgs boson decays into two muons 3.ATLAS Level-1 Calorimeter eFEX noise threshold studies and tau BDT 4.Data quality monitoring and ATLAS operation

Physics, UNIVERSITY OF BONN. Alemania, 2025
Physics, UNIVERSITY OF BONN. Alemania, 2016
Nuclear and Particle Physics, UNIVERSITY OF ATHENS. Grecia, 2015

Postdoctoral Research Assistant in Higgs Physics Full Time

QUEEN MARY UNIVERSITY OF LONDON

Science and Engineering

London, Reino Unido

2023 - At present
PhD researcher Part Time

UNIVERSITY OF BONN

Faculty of Mathematics and Natural sciences

Bonn, Alemania

2016 - 2025

Ph.D. Student Part Time

University of Bonn

Bonn, Alemania

2016 - 2025
Teaching Assistant Other

University of Bonn

Bonn, Alemania

2017 - 2020
Postdoctoral Research Assistant in Higgs Physics Full Time

Queen Mary University of London

London, Reino Unido

2023 - At present
Student Other

The IG Group

London, Reino Unido

2025 - At present

Probabilistic Programming with Python and Julia:
link: https://www.udemy.com/course/probabilistic-programming-with-python-and-julia/

LinkedIn training:
Nano Tips for Inclusive Leadership with India Martin
How Leaders Can Motivate Others by Creating Meaning
Leadership: Practical Skills
Leading and Motivating People with Different Personalities

Conferences:
1. XV Latin American Symposium on High Energy Physics (SILAFAE)
Title: Exotic searches at ATLAS
Indico: https://indico.cern.ch/event/1466443/
CDS: https://cds.cern.ch/record/2915078

2. Invited seminar speaker at Queen Mary University of London (June 2023)
Title: Search for Heavy Resonances Decaying to Tau Lepton and Neutrino at ATLAS
Indico: https://indico.ph.qmul.ac.uk/event/1755/

3. 28th International Conference on Supersymmetry and Unification of Fundamental Interactions
Title: Searches for new physics with leptons using the ATLAS detector
Indico: https://indico.cern.ch/event/1065698/
CDS: https://cds.cern.ch/record/2778508

4. The 2021 European Physical Society conference for high energy physics
Title: LGBTQ+ Inclusivity: How to be an ally
Indico: https://indico.desy.de/event/28202/
Slides: https://indico.desy.de/event/28202/contributions/106199/attachments/67653/84301/InclusivityAndDiversity_fin.pdf

national ones?
DPG
IOP

The 2025 Breakthrough Prize in Fundamental Physics

QUEEN MARY UNIVERSITY OF LONDON

Reino Unido, 2025

For detailed measurements of Higgs boson properties confirming the symmetry-breaking mechanism of mass generation, the discovery of new strongly interacting particles, the study of rare processes and matter-antimatter asymmetry, and the exploration of nature at the shortest distances and most extreme conditions at CERN’s Large Hadron Collider.


Search for Higgs boson pair production in the two bottom quarks plus two photons final state in pp collisions at √s=13 TeV with the ATLAS detector Abusleme Hoffman, A. C.; Arena E.; Asbah, N. A.; Atmasiddha, P. A.; Auricchio S.; Avner G.; Badea A.; Ballabene E.; Barends, K. N.; Bashta I.; et al. Article ISI SCOPUS Physical Review D (2022)
A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector Gaudio, M. Del; Merino, J. Llorente; Sterzo, F. Lo; Pyatiizbyantseva, D; Valls Ferrer, J. A.; Varvell, K. E.; Vazquez Schroeder, T; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; et al. Article ISI SCOPUS Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (2021)
Differential cross-section measurements for the electroweak production of dijets in association with a Z boson in proton-proton collisions at ATLAS Merino, J. Llorente; Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Vazquez Schroeder, T; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; et al. Article ISI SCOPUS European Physical Journal C (2021)
Measurement of hadronic event shapes in high-p(T) multijet final states at root s=13 TeV with the ATLAS detector Merino, J. Llorente; Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Vazquez Schroeder, T; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; et al. Article ISI SCOPUS Journal of High Energy Physics (2021)
Measurement of light-by-light scattering and search for axion-like particles with 2.2 nb(-1) of Pb+Pb data with the ATLAS detector Aranzabal N.; Asada H.; Asai K.; Balasubramanian R.; Bayirli A.; Bhopatkar, V. S.; Birch-sykes, C. J.; Borbely, A. G.; Brener, R; Carratta, G; et al. Article ISI SCOPUS Journal of High Energy Physics (2021)
Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in pp collisions at root s=13 TeV using the ATLAS detector Merino, J. Llorente; Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Vazquez Schroeder, T; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; et al. Article ISI SCOPUS Journal of High Energy Physics (2021)
Search for doubly and singly charged Higgs bosons decaying into vector bosons in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13 TeV Babal D.; Merino, J. Llorente; Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Vazquez Schroeder, T; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; et al. Article ISI SCOPUS Journal of High Energy Physics (2021)
Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in pp collisions at root s=13 TeV with the ATLAS detector Merino, J. Llorente; Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Vazquez Schroeder, T; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; et al. Article ISI SCOPUS Journal of High Energy Physics (2021)
A search for the Z gamma decay mode of the Higgs boson in pp collisions at root s=13 TeV with the ATLAS detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (2020)
Alignment of the ATLAS Inner Detector in Run 2 Asquith; Brüers, B; Cadoux F.; Lopes De Sa, R. Coelho; Merino, J. Llorente; Costa, A. M. Mendes Jacques; Monti, M. M.; Navarro-Gonzalez, J; Prades Ibanez, A; Salvador Salas, A; et al. Article ISI SCOPUS European Physical Journal C (2020)
Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeV Merino, J. Llorente; Miano Moya, M.; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; et al. Article ISI SCOPUS Journal of High Energy Physics (2020)
Combined measurements of Higgs boson production and decay using up to 80 fb-1 of proton-proton collision data at ?s =13 TeV collected with the ATLAS experiment Chan S.K.W.; Chan S.W.; Chan Y.; Conde MuiÃ±o P.; DÃez Cornell S.; Duan Y.; GarcÃa Pascual J.A.; Gouighri, M; Hernandez JimÃ©nez Y.; H Hommels L.B.A.; et al. Article ISI SCOPUS Physical Review D (2020)
Evidence for tttt production in the multilepton final state in proton-proton collisions at s=13 TeV with the ATLAS detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS European Physical Journal C (2020)
Measurement of the t(t)over-bar production cross-section in the lepton plus jets channel at root s=13 TeV with the ATLAS experiment Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (2020)
Measurements of inclusive and differential cross-sections of combined t(t)over-bar and tW gamma production in the e mu channel at 13 TeV with the ATLAS detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Journal of High Energy Physics (2020)
Operation of the ATLAS trigger system in Run 2 Austrup, V. A.; Bakos E.; Brueers, B; Pinto, J. V. Fonseca; Forland, B. C.; Frattari, G; Haaland, E. S.; Lambert, J. E.; Merino, J. Llorente; Macdonald, J. C.; et al. Article ISI SCOPUS Journal of Instrumentation (2020)
Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking Corrado, J. G.; Walls, M. Garay; Merino, J. Llorente; Miano Moya, M.; Sayago Galvan, I; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; et al. Article ISI SCOPUS Journal of High Energy Physics (2020)
Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger Duffeld, E. M.; Guenvaz, J.; Merino, J. Llorente; Peier, T.; Prokoev, K.; Readio, N. P.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; et al. Article ISI SCOPUS Journal of Instrumentation (2020)
Search for direct production of electroweakinos in final states with one lepton, missing transverse momentum and a Higgs boson decaying into two b-jets in pp collisions at root s=13 TeV with the ATLAS detector Costa, J. Barreiro Guimaraes; Chen Y.H.; Sargedas De Sousa, M. J. Cunha; Fonseca Pinto, J., V; Via, C.; Vale, M. A. B.; Grivaz, J. F.; Merino, J. Llorente; Rhne, O; Varvell, K. E.; et al. Article ISI SCOPUS European Physical Journal C (2020)
Search for Heavy Higgs Bosons Decaying into Two Tau Leptons with the ATLAS Detector Using pp Collisions at root s=13 TeV Camelia, E. Alunno; Estevez, M. Alvarez; Andrean, S. Y.; Aparo, M. A.; Barron U.; Bartels F.; Belfkir M.; Berthold A.; Bjrke, K; Borgna, L. S.; et al. Article ISI SCOPUS Physical Review Letters (2020)
Search for Heavy Resonances Decaying into a Photon and a Hadronically Decaying Higgs Boson in pp Collisions at root s=13 TeV with the ATLAS Detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Physical Review Letters (2020)
Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at root s=13 TeV Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Physical Review D (2020)
Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Journal of High Energy Physics (2020)
Search for new resonances in mass distributions of jet pairs using 139 fb?1 of pp collisions at ?s = 13 TeV with the ATLAS detector Duan Y.; Gouighri, M; Hamer M.; Kahn, A; Kaneda, M; Komarek, T; Martinelli L.; Nechansky, F; Popa, S; Rojas, R. A.; et al. Article ISI SCOPUS Journal of High Energy Physics (2020)
Search for pairs of scalar leptoquarks decaying into quarks and electrons or muons in root s=13 TeV pp collisions with the ATLAS detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Journal of High Energy Physics (2020)
Search for resonances decaying into a weak vector boson and a Higgs boson in the fully hadronic final state produced in proton - proton collisions at root s=13 TeV with the ATLAS detector Abud, A.; Bourdarios, Adam C.; Arrubarrena Tame, Z. P.; Navarro, Barranco L.; Sola, J. D.; Madden, W. D.; de Renstrom, P. A.; Vazquez, C. J.; Urban, S.; Armadans, R.; et al. Article ISI SCOPUS Physical Review D (2020)
Search for t(t)over-bar resonances in fully hadronic final states in pp collisions at root s=13 TeV with the ATLAS detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS Journal of High Energy Physics (2020)
Search for top squarks in events with a Higgs or Z boson using 139 fb(-1) of pp collision data at root s=13 TeV with the ATLAS detector Merino, J. Llorente; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vossebeld, J. H.; Ward, C. P.; Wardrope, D. R.; et al. Article ISI SCOPUS European Physical Journal C (2020)
Electron and photon energy calibration with the ATLAS detector using 2015-2016 LHC proton-proton collision data Abbott, D. C.; Atmani H.; Bailey, V. R.; Borecka-Bielska, H. M.; Camarero Munoz, D; Carter, J. W. S.; Chan, W. Y.; Chevalerias, T. J. A.; Cowley, J. W.; Freundlich, E. M.; et al. Article ISI SCOPUS JOURNAL OF INSTRUMENTATION (2019)
Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector Arling, J. -H.; Azoulay, A. M.; Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; et al. Article ISI SCOPUS JOURNAL OF HIGH ENERGY PHYSICS (2019)
Measurement of the ratio of cross sections for inclusive isolated-photon production in pp collisions at root s=13 and 8 TeV with the ATLAS detector Aparisi Pozo, J. A.; Balunas, W. K.; Bjergaard, D. M.; Boutle, S. K.; Carbone, R. M.; Casper, D. W.; Corpe, L. D.; Fray, A. N.; Fressard-Batraneanu, S. M.; Frizzell, D. C.; et al. Article ISI SCOPUS Journal of High Energy Physics (2019)
Measurements of inclusive and differential fiducial cross-sections of t(t)over-bar production with additional heavy-flavour jets in proton-proton collisions at root s=13 TeV with the ATLAS detector Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vinogradov, V. B.; Vossebeld, J. H.; et al. Article ISI SCOPUS JOURNAL OF HIGH ENERGY PHYSICS (2019)
Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at s =13 TeV with the ATLAS detector Merino, J. Llorente; Turra, R. T.; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vinogradov, V. B.; et al. Article ISI SCOPUS PHYSICAL REVIEW D (2019)
Search for heavy Majorana or Dirac neutrinos and right-handed W gauge bosons in final states with two charged leptons and two jets at TeV with the ATLAS detector Merino, J. Llorente; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vinogradov, V. B.; Vossebeld, J. H.; et al. Article ISI JOURNAL OF HIGH ENERGY PHYSICS (2019)
Search for Higgs boson pair production in the b(b)over-barWW* decay mode at root s=13 TeV with the ATLAS detector Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vinogradov, V. B.; Vossebeld, J. H.; et al. Article ISI SCOPUS Journal of High Energy Physics (2019)
Search for Higgs boson pair production in the WW()WW() decay channel using ATLAS data recorded at root s=13 TeV Sterzo, F. Lo; Valls Ferrer, J. A.; Varvell, K. E.; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Viehhauser, G. H. A.; Vincter, M. G.; Vinogradov, V. B.; Vossebeld, J. H.; et al. Article ISI JOURNAL OF HIGH ENERGY PHYSICS (2019)
Study of the rare decays of B0 and B-0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector Loew, K. M.; Valls Ferrer, J. A.; Varvell, K. E.; Vazquez Schroeder, T; Veloce, L. M.; Vermeulen, J. C.; Vetterli, M. C.; Barreto Pinto, M. Vicente; Vickey Boeriu, O. E.; Viehhauser, G. H. A.; et al. Article ISI SCOPUS JOURNAL OF HIGH ENERGY PHYSICS (2019)
Search for High-Mass Resonances Decaying to tau nu in pp Collisions at root s=13 TeV with the ATLAS Detector ATLAS Collaboration; Zwalinski, L; Zorbas, T. G.; Zoch, K.; Zoccoli, A; Zobernig, G; Ziolkowski, M; Zinser, M; Zinonos, Z; Zimmermann S.; et al. Article ISI PHYSICAL REVIEW LETTERS (2018)