Matt LeBlanc completed his Ph.D. in experimental particle physics at the University of Victoria (Canada), and held postdoctoral appointments at the University of Arizona, CERN and the University of Manchester (UK) as a member of the ATLAS Collaboration. He became a member of the CMS Collaboration after coming to Brown in 2024.
Matt has lead physics analyses at the LHC on a broad range of topics, including both precision measurements and searches for new physics. His work particularly focuses on the use of hadronic objects and final states to extract new information about the Standard Model and to search for signs of new particles. Beyond searches and measurements, Matt has also held coordination-level positions within ATLAS related to the reconstruction and calibration of hadronic objects.
| Cari Cesarotti and Matt LeBlanc. "A Field Guide to Event-Shape Observables Using Optimal Transport." Submitted to JHEP, 2024. |
| Andersen et al. "Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report." Physics of the TeV Scale and Beyond the Standard Model: Intensifying the Quest for New Physics (PhysTeV 2023), 2024. |
| ATLAS Collaboration. "Measurement of Track Functions in ATLAS Run 2 Data." 2024. |
| ATLAS Collaboration. "Measurements of jet cross-section ratios in 13 TeV proton--proton collisions with ATLAS." Physical Review D, vol. 110, no. 7, 2024, pp. 072019. |
| ATLAS Collaboration. "Measurements of Lund subjet multiplicities in 13 TeV proton-proton collisions with the ATLAS detector." Accepted by PLB, 2024. |
| ATLAS Collaboration. "Constituent-based W-boson tagging with the ATLAS detector." ATL-PHYS-PUB-2023-020, 2023. |
| Florian Dachs et al. "Development of a large-area, light-weight module using the MALTA monolithic pixel detector." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1047, 2023, pp. 167809. |
| Matt LeBlanc, Benjamin Nachman, Christof Sauer. "Going off topics to demix quark and gluon jets in αS extractions." Journal of High Energy Physics, vol. 2023, no. 2, 2023. |
| Heinz Pernegger et al. "MALTA-Cz: a radiation hard full-size monolithic CMOS sensor with small electrodes on high-resistivity Czochralski substrate." Journal of Instrumentation, vol. 18, no. 09, 2023, pp. P09018. |
| ATLAS Collaboration. "Measurements of multijet event isotropies using optimal transport with the ATLAS detector." Journal of High Energy Physics, vol. 2023, no. 10, 2023. |
| ATLAS Collaboration. "New techniques for jet calibration with the ATLAS detector." European Journal of Physics C, vol. 83, no. 8, 2023, pp. 761. |
| Milou van Rijnbach et al. "Performance of the MALTA telescope." The European Physical Journal C, vol. 83, no. 7, 2023. |
| ATLAS Collaboration. "Pursuit of paired dijet resonances in the Run 2 dataset with ATLAS." Physical Review D, vol. 108, no. 11, 2023. |
| Francesco Piro et al. "A 1 μW Radiation-Hard Front-End in a 0.18-μm CMOS Process for the MALTA2 Monolithic Sensor." IEEE Transactions on Nuclear Science, vol. 69, no. 6, 2022, pp. 1299-1309. |
| Matt LeBlanc, on behalf of the ATLAS & CMS Collaborations. "Jet and photon physics in ATLAS and CMS." Proceedings of the 56th Rencontres de Moriond on QCD and High Energy Interactions, 2022. |
| Ben Nachman, Salvatore Rappoccio, Nhan Tran et al. "Jets and Jet Substructure at Future Colliders." Frontiers in Physics, vol. 10, 2022. |
| Abhishek Sharma et al. "Latest developments and characterisation results of the MALTA sensors in TowerJazz 180nm for High Luminosity LHC." Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021), 2022. |
| Dominik Dobrijević et al. "MALTA3: Concepts for a new radiation tolerant sensor in the TowerJazz 180 nm technology." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1040, 2022, pp. 167226. |
| M. van Rijnbach et al. "Radiation hardness and timing performance in MALTA monolithic pixel sensors in TowerJazz 180 nm." Journal of Instrumentation, vol. 17, no. 04, 2022, pp. C04034. |
| Matt LeBlanc et al. "Recent results with radiation-tolerant TowerJazz 180 nm MALTA sensors." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1041, 2022, pp. 167390. |
| Giuliano Gustavino et al. "Timing performance of radiation hard MALTA monolithic pixel sensors." Journal of Instrumentation, vol. 18, no. 03, 2022, pp. C03011. |
| ATLAS Collaboration. "Identification of hadronically-decaying top quarks using UFO jets with ATLAS in Run 2." ATL-PHYS-PUB-2021-028, 2021. |
| ATLAS Collaboration. "Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton-proton collisions." European Journal of Physics C, vol. 81, no. 4, 2021, pp. 334. |
| ATLAS Collaboration. "Towards a precise interpretation of the top quark mass parameter in ATLAS Monte Carlo samples." ATL-PHYS-PUB-2021-034, 2021. |
| S. Amoroso et al. "Les Houches 2019: Physics at TeV Colliders: Standard Model Working Group Report." 2020. |
| ATLAS Collaboration. "Measurement of soft-drop jet observables in pp collisions with the ATLAS detector at sqrt(s)=13 TeV." Physical Review D, vol. 101, no. 5, 2020. |
| ATLAS Collaboration. "Measurement of the Lund Jet Plane Using Charged Particles in 13 TeV Proton-Proton Collisions with the ATLAS Detector." Physical Review Letters , vol. 124, no. 22, 2020. |
| Matt LeBlanc, on behalf of the ATLAS Collaboration. "Measurements of event shapes and jet substructure with ATLAS Run 2 data." Proceedings of The Eighth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2020), 2020. |
| ATLAS Collaboration. "Constraints on mediator-based dark matter and scalar dark energy models using sqrt(s)=13 TeV pp collision data collected by the ATLAS detector." Journal of High Energy Physics, vol. 2019, no. 5, 2019. |
| ATLAS Collaboration. "In situ calibration of large-radius jet energy and mass in 13 TeV proton–proton collisions with the ATLAS detector." The European Physical Journal C, vol. 79, no. 2, 2019. |
| ATLAS Collaboration. "Combination of the searches for pair-produced vector-like partners of the third-generation quarks at sqrt(s)=13 TeV with the ATLAS detector." Physical Review Letters, vol. 121, no. 21, 2018. |
| Matt LeBlanc, on behalf of the ATLAS Collaboration. "Inclusive searches for squarks and gluinos with the ATLAS detector." Proceedings of XXVI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2018), 2018. |
| ATLAS Collaboration. "Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at sqrt(s)=13 TeV with the ATLAS detector." Journal of High Energy Physics, vol. 2018, no. 12, 2018. |
| ATLAS Collaboration. "Search for supersymmetry in final states with missing transverse momentum and multiple b-jets in proton-proton collisions at sqrt(s)=13 TeV with the ATLAS detector." Journal of High Energy Physics, vol. 2018, no. 6, 2018. |
| ATLAS Collaboration. "Impact of Alternative Inputs and Grooming Methods on Large-R Jet Reconstruction in ATLAS." ATL-PHYS-PUB-2017-020, 2017. |
| 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, vol. 2016, no. 6, 2016. |
| 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, vol. 94, no. 3, 2016. |
| Ryan P. Taylor et al. "The Evolution of Cloud Computing in ATLAS." Journal of Physics: Conference Series, vol. 664, no. 2, 2015, pp. 022038. |
| 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, vol. 2014, no. 9, 2014. |
Member of the ATLAS Collaboration from 2010-2023 (signing author, 2015-2024).
The primary focus of my research is using LHC data to improve our understanding of Quantum Chromodynamics (QCD); the strong interaction between quarks and gluons in the Standard Model (SM). I have contributed to important measurements of jet substructure observables that have advanced our understanding of jet formation during Run 2 of the LHC. I have also performed searches for new particles (e.g. collider-produced Dark Matter and Supersymmetric partners of SM particles) in hadronic final states.
Moreover, I am interested in finding new opportunities that Artificial Intelligence and Machine Learning (AI/ML) can provide in the area of precision measurements at the LHC. I have contributed to several studies demonstrating the potential of such techniques in extractions of Standard Model parameters at the LHC using jet substructure, which would complement existing approaches.
Beyond jets and QCD, I have also worked to commission prototype radiation-hard CMOS pixel sensors for future detectors. This work involved lab-based measurements and the construction and operation of a pixel telescope for test-beam data-taking in CERN’s North Area. New silicon technologies such as CMOS sensors will play a major role in the tracking detectors at future collider physics facilities like the planned Electron Ion Collider (EIC) at Brookhaven National Laboratory, and the proposed Future Circular Collider (FCC) and Muon Collider (µC).
| Year | Degree | Institution |
|---|---|---|
| 2017 | PhD | University of Victoria |
| 2011 | BSc | Acadia University |
| Postdoctoral Research Associate | University of Manchester, Department of Physics and Astronomy | 2023-2023 | Manchester, UK |
| Senior Research Fellow | European Organization for Nuclear Research (CERN), Experimental Physics Department | 2021-2023 | Geneva, Switzerland |
| Postdoctoral Research Associate | University of Arizona, Department of Physics | 2017-2020 | Tucson, Arizona, USA |
| Name | Title |
|---|---|
| Barone, Gaetano | Assistant Professor of Physics (Research) |
| Cutts, David | Professor Emeritus of Physics |
| Gouskos, Loukas | Assistant Professor of Physics |
| Heintz, Ulrich | Professor of Physics |
| Landsberg, Greg | Thomas J. Watson, Sr. Professor of Physics |
| Roloff, Jennifer | Assistant Professor of Physics |
| Group Convener, Jet/EtMiss Combined Performance. ATLAS Collaboration, 2022-2023 |
| Member (ex officio), Physics Coordination Team. ATLAS Collaboration, 2022-2023 |
| Subgroup Convener, Standard Model Jet & Photon Physics. ATLAS Collaboration, 2020-2022 |
| Subgroup Convener, Jet/EtMiss Definitions & MC Calibrations. ATLAS Collaboration, 2019-2020 |
| Subgroup Convener, Jet/EtMiss Jet Energy Scale & Resolution. ATLAS Collaboration, 2018-2019 |
| PHYS 0040 - Basic Physics B |
