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Research in a nutshell
My current research activities focus mainly on jet physics. With G.P. Salam and M. Cacciari, we
have introduced three tools widely used at the LHC: the antik t algorithm, FastJet (a package for
jet finding), and a strategy for pileup subtraction. A fraction of my research today is focused on an
analytic understanding of jet substructure and related topics.
More generally, I am interested by LHC phenomenology and QCD in particular. For example, I
also study the highenergy limit of QCD with the group at the IPhT in CEA Saclay, an activity that
I started when I was a PostDoc at the IPhT and pursued at the Brookhaven National Laboratory.
My earlier research experience, during my PhD, focused on the proton structure functions and
the interplay between perturbative QCD and Regge theory. I have also worked independently on the
structure of the QCD vacuum, using lightcone quantisation.
Profile on InSpire: http://inspirehep.net/author/profile/G.Soyez.1
ORCID: 0000000294909025
Employment
 February 2010  now: CNRS Scientific Associate at the Instute for Theoretical Physics at the CEA Saclay (CNRS CR1 since February 2014).
 October 2009  September 2010: Postdoc position at CERN (CERN Fellow).
 October 2007  September 2009: Postdoc position at the Brookhaven National Laboratory (Research Associate).
 October 2004  September 2007: Postdoc position as a FNRS Research Fellow (Chargé de recherches).
With this fellow, I have visited the following places:
 October 2004  October 2006: SPhT, CEA Saclay, France
 November 2006  January 2007: LPTHE, University Paris VI/VII, France
 February 2007  March 2007: GGI program, Firenze, Italy
 March 2007  Now: BNL, NewYork, USA
 October 2000  September 2004: PhD. thesis at the University of Liège as a FNRS fellow (aspirant).
Degrees
 Candidature (2nd year degree) in Physics from the University of Liège.
First year with highest honors in 199697 and second year with highest honors in 19971998.
 Candidature (2nd year degree) in Mathematics from the University of Liège.
First year with highest honors in 199697 and second year with highest honors in 19971998.
 License (4th year degree) in Physics from the University of Liège.
First year with highest honors in 199899 and second year with highest honors in 19992000.
 D.E.A. (5th year degree) in Physics from the University of Liège
obtained with highest honors in 20012002.
 Ph.D. in Physics from the University of Liège
obtained with highest honors on January 6th, 2004.
Thesis and dissertations
 Habilitation thesis: (20170310) [PDF]
Pileup mitigation at the LHC (a theorist view)
 Ph.D. thesis: [PS, PDF]
Deep Inelastic Scattering at small x: Perturbative QCD and Smatrix theory.
 Master Dissertation : [PS, PDF]
The DGLAP evolution equation: Analytical properties and numerical resolution.
 Undergraduate Dissertation: Lightcone quantisation, application to vacuum and zero modes.
Software Projects
 FastJet: an interface to fast jetfinding algorithms with tools for background subtraction using
jet areas. Developed with M. Cacciari and G.P. Salam. See http://www.fastjet.fr
 SISCone: the Seedless and InfraredSafe Cone algorithm, developed with G.P. Salam.
See http://projects.hepforge.org/siscone
Distinctions and grants
 10/201603/2021: DenseQCDAtLHC (member): grant from the French ANR (Agence Nationale de la Recherche), PI: Edmond Iancu.
 10/201509/2019: OptiomalJets (PI): grant from the French ANR (Agence Nationale de la Recherche).
 10/201103/2016: CGC@LHC (member): grant from the French ANR (Agence Nationale de la Recherche), PI: Francois Gelis.
 10/201009/2014: Jets4LHC (PI): Chaire d'Excellence grant from the French ANR (Agence Nationale de la Recherche).
 07/2000: Physics prize given by the University of Liege for the years 19962000. That prize is granted each year to a student in Physics getting his diploma.
 07/1997: Roset Prize, given by the AMULg (Association of the Ulg Mathematicians) for the year 199697. That prize is granted each year to a student in Mathematical Sciences.
 07/1996: Participation, with the Belgian team, to the 37th International Mathematical Olympiad, in 1996. Bronze medal.
Supervision of students and postdocs
 20172019: Postdoc to be hired on the OptimalJets ANR grant
 20142017: PhD advisor of Lais Sarem Schunk
 2014: Master internship advisor of Lais Sarem Schunk
 20112013: Supervision of JiHun Kim's postdoc
 2011: Master internship advisor of Steİphane Dartois(ENS Lyon)
Teaching experience
 2011now: Exercises for the QCD lectures at the ENS (Master 2) (6 hours)
 06/2016: lectures on jet physics at the QCDMasterClass summer school (France, 6 hours)
 06/2016: Member of Matthias Saimpert's PhD jury
 12/2015: lectures on Advanced QCD at the UCL (Louvain, Belgium, 10 hours)
 10/2015: lectures on jets physics the Prague University (6 hours)
 2015: QCD lectures at the ENS (Master 2) (12 hours)
 10/2014: Member of Martin Zeeman's PhD jury
 09/2014: lectures on jets physics at a Summer school in Natal (Bresil, 6 hours)
 04/2014: lectures on QCD and jet physics at a school in Trento (Italy, 6 hours)
 09/2011: Discussion Leader at the CERN European School of HighEnergy Physics (Romania, 2011, 11 hours)
 09/2010: lectures on Phenomenology of hardonic collisions at the BND Summer School (Oostende, Belgium, 6 hours)
 12/2008: lectures on Advanced QCD at the UCL (Louvain, Belgium, 10 hours)
 2004: Physics laboratories for the general physics course for 1 st year students in Computer Sciences (50 hours/year)
 2003: Physics laboratories for the general physics course for 1 st year students in Computer Sciences (50 hours/year)
 20002001: Programming exercises for B.A. students in Chemistry (30 hours/year)
Institutional responsibilities
 09/201209/2016: Member of the Section 02 (Particle physics: Theory and Models) of the French National Committee for Scientific Research (CoNRS)
 2011, 2013: Jet contact for the LesHouches Physics at TeV collider workshops
Organiasation of meetings and seminars
 2018: Main organiser (with Matteo Cacciari) of the Boost 2018 conference
 2016: Main organiser (with Matteo Cacciari) of the PSR 2016 workshop
 2015: Organisation committee for the conference Poetic
2015: Organisation committee for the conference Blois 2015
 04/2014: Coorganisation of the workshop QCD and forward physics at the LH
 07/2013: Coorganisation of the Workshop on jets in HeavyIon collisions, in Par
 10/2011now: Coorganisation of the weekly Particle Physics and Cosmology seminars at the IPhT (CEA Saclay)
 10/200809/2009: Organisation of the week
