Matt LeBlanc

Postdoctoral Research Associate

University of Arizona

Research

Curriculum vitae

As a member of the ATLAS collaboration, I am interested in using jet substructure techniques to search for signs of new physics in Large Hadron Collider proton-proton collisions. I study the performance of different boosted object reconstruction techniques, and apply these techniques in searches for natural supersymmetry. Previously, I have studied the feasibility of commercial cloud resources, such as those provided by Google and Amazon, for use by ATLAS.

Studies of various top tagging techniques were made on the full 2012 dataset, including in-depth comparisions of the performance of different cut-based substructure taggers, which formed a baseline against which the performance of more sophisticated tagging methods was evaluated. These studies included the first in-situ measurements of top tagging efficiencies and fake rates published by ATLAS.

Searches for natural supersymmetry in final states with four top- or b-quarks lend themselves well to the application of jet-substructure and flavour-based tagging techniques. In a search for gluino pair production in 2015, a mass-based top tagger was introduced to increase sensitivity to regions of phase space where the mass splitting between the gluino and LSP is large and top quarks are often produced with large boosts. In 2016, the total jet mass replaced discrete top tagging in this analysis, exploiting the four top-quark final state's hard structure in in a more continuous and general way.

Publications

Full 2016 dataset

ATLAS Collaboration, Jet reclustering and close-by effects in ATLAS Run 2 ATLAS-CONF-2017-062, Conference Note (BOOST 2017)

Partial 2016 dataset + full 2015 Dataset

ATLAS Collaboration, Search for pair production of gluinos decaying via top or bottom squarks in events with b-jets and large missing transverse momentum in pp collisions at sqrt(s)=13 TeV with the ATLAS detector ATLAS-CONF-2016-052, Conference Note (ICHEP 2016)

Full 2015 Dataset

ATLAS Collaboration, Search for pair production of gluinos decaying via stop and sbottom in events with b-jets and large missing transverse momentum in pp collisions at sqrt(s) = 13 TeV with the ATLAS detector Physical Review D 94, 032003 (2016). ATLAS Collaboration, Search for gluino-mediated stop and sbottom pair production in events with b-jets and large missing transverse momentum in sqrt(s)=13 TeV pp collisions with the ATLAS detector ATLAS-CONF-2015-067, Conference Note (CERN End-of-Year Event 2015)

Full 2012 Dataset

ATLAS Collaboration, Identification of high transverse momentum top quarks in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector. Journal of High Energy Physics, 06, 093 (2016) ATLAS Collaboration, Identification of high transverse momentum top quarks in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector. ATLAS-CONF-2015-036, Conference Note (BOOST 2015). ATLAS Collaboration, Search for direct pair production of the top squark in all-hadronic final states in proton-proton collisions at sqrt(s) = 8 TeV with the ATLAS detector. Journal of High Energy Physics, 09, 015 (2014)

ATLAS Computing

Ryan P Taylor, Frank Berghaus, Franco Brasolin, Cristovao Jose Domingues Cordeiro, Ron Desmarais, Laurence Field, Ian Gable, Domenico Giordano, Alessandro Di Girolamo, John Hover, Matthew LeBlanc, Peter Love, Michael Paterson, Randall Sobie, Alexandr Zaytsev, The evolution of cloud computing in ATLAS. Journal of Physics: Conference Series, Volume 664, Clouds and Virtualization (CHEP 2015).

Teaching and outreach

TRIUMF
2015, 2014, 2013 Public Tour Guide
2015, 2014 ISAC-II Station Guide Emily Carr Artists-in-Residence Visits
Spring 2014 Instructor ATLAS Masterclass @ TRIUMF
2013 Photographer TRIUMF Open House
University of Victoria
Spring 2012 Instructor ATLAS Masterclass @ UVic
Winter 2012 Lab Instructor Physics 112, Introductory Physics II
Fall 2011 Lab Instructor Physics 112, Introductory Physics I
Acadia University
Winter 2010 Teaching Assistant Math 2723, Introductory Differential Equations
Lab Assistant Physics 1063, General Physics II
Studio Assistant Math 1023, Introductory Calculus II
Fall 2009 Lab Assistant Physics 1053, General Physics I
Winter 2009 Lab Assistant Physics 1023, Introductory Physics II
Fall 2008 Physics Drop-in Help Center Tutor

Contact

I'm currently based at CERN, and the contact information found here should typically be up-to-date. If you want to reach me directly, you can also send me an e-mail or tweet directly. If you're interested in collaborating, github is probably the best place to start. If you want to race, I'll see you on strava.