Personal profile
Short presentation
Troels is an experimental particle physicist, working mainly on the ATLAS experiment at CERN but also on the Icecube experiment on the South Pole.
His main research interests are in the areas of Particle Physics (LHC, Higgs decays, searches), Machine Learning (geometric learning, combining methods, application to science+ cases), Statistics & Data Analayis (data reduction, fitting, hypothesis testing), and Calibration (pushing detector performance and understading to the limit).
He teaches statistics and Machine Learning and supervise a significant number of master students. Troels won the Science Faculty Dissemination Prize in 2015 and the Teaching Award of the faculty in 2021.
CV
I studied for my Ph.D. in Paris working on the BaBar experiment at Stanford 2001-2004. Since, I have have been working mainly on the ATLAS experiment, where I have contributed to electron identification in particular with the Transition Radiation Tracker (TRT), worked on both the W mass measurement, searchers for stable massive particles, the Higgs discovery, and the search for additional Higgs particles and decays. I have been know for my application of Machine Learning (ML) to the ATLAS data analysis.
Lately, I have also been involved in the IceCube experiment on using Graph Neural Networks for event classification and reconstruction.
Generally, I am a ML enthusiast and avid user, having applied ML to many cases in particle physics and beyond. I teach two large and relatively acclaimed courses on applied statistics and ML, respectively.
In my (sparse) spare time, I love traveling to far off exotic places, sailing, and playing football, squash, tennis, and strategy games.
Collaborations and top research areas from the last five years
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Evidence for the Collective Nature of Radial Flow in Pb+Pb Collisions with the ATLAS Detector.
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, A. S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhosn, J. A., Abramowicz, H., Abulaiti, Y., Acharya, B. S., Dam, M., Camplani, A., Hansen, J. B., Petersen, T. C., Hansen, P. H., Wiglesworth, G., Xella, S. & ATLAS Collaboration, 22 Jan 2026, In: Physical Review Letters. 136, 3, 24 p., 032301.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile1 Citation (Scopus)3 Downloads (Pure) -
A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, A. S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Dam, M., Camplani, A., Hansen, J. B., Hansen, P. H., Petersen, T. C., Wiglesworth, G. & Xella, S. & 1 others, , 10 Nov 2025, In: European Physical Journal C. 85, 11, 44 p., 1272.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile3 Downloads (Pure) -
A gradient-boosted tree framework to model the ice thickness of the world's glaciers (IceBoost v1.1)
Maffezzoli, N., Rignot, E., Barbante, C., Petersen, T. & Vascon, S., 9 May 2025, In: Geoscientific Model Development. 18, 9, p. 2545-2568 24 p.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile3 Downloads (Pure) -
A measurement of the high-mass ττ‾production cross-section at √s= 13 TeV with the ATLAS detector and constraints on new particles and couplings
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, A. S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abulaiti, Y., Acharya, B. S., Ackermann, A., Dam, M., Camplani, A., Hansen, J. B., Hansen, P. H., Petersen, T. C., Wiglesworth, G. & Xella, S. & 1 others, , 7 Oct 2025, In: Journal of High Energy Physics. 2025, 10, 52 p., 054.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile1 Citation (Scopus)2 Downloads (Pure) -
An implementation of neural simulation-based inference for parameter estimation in ATLAS
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, A. S., Abeling, K., Abicht, N. J., Abidi, S. H., Abeling, K., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abulaiti, Y., Acharya, B. S., Ackerman, P. A., Dam, M., Camplani, A., Hansen, J. B., Hansen, P. H., Petersen, T. C. & Wiglesworth, G. & 2 others, , 27 May 2025, In: Reports on Progress in Physics. 88, 32 p., 067801.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile7 Citations (Scopus)4 Downloads (Pure) -
A precise measurement of the jet energy scale derived from single-particle measurements and in situ techniques in proton-proton collisions at √s=13 TeV with the ATLAS detector
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, A. S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhosn, J. A., Abramowicz, H., Abreu, H., Abulaiti, Y., Ackermann, A., Dam, M., Camplani, A., Hansen, J. B., Hansen, P. H., Petersen, T. C., Wiglesworth, G. & Xella, S. & 1 others, , 1 Sept 2025, In: European Physical Journal C. 85, 9, 32 p., 927.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile2 Downloads (Pure) -
A search for dark matter produced in association with a dark Higgs boson decaying into a Higgs boson pair in 3b or 4b final states using pp collisions at √s =13 TeV with the ATLAS detector
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, A. S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abulaiti, Y., Acharya, B. S., Ackermann, A., Adam Bourdarios, C., Dam, M., Camplani, A., Hansen, J. B., Hansen, P. H., Petersen, T. C. & Wiglesworth, G. & 2 others, , 8 Sept 2025, In: Journal of High Energy Physics (Online). 2025, 09, 49 p., 067.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile2 Citations (Scopus)8 Downloads (Pure) -
ATLAS searches for additional scalars and exotic Higgs boson decays with the LHC Run 2 dataset
Aad, G., Aakvaag, E., Abbott, B., Abdelhameed, S., Abeling, K., Abicht, N. J., Abidi, S. H., Aboelela, M., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Dam, M., Camplani, A., Hansen, J. B., Hansen, J. D., Hansen, P. H., Ignazzi, R., Petersen, T. C. & Wiglesworth, G. & 2 others, , 22 Apr 2025, In: Physics Reports. 1116, p. 184-260 77 p.Research output: Contribution to journal › Journal article › Research › peer-review
Open AccessFile9 Citations (Scopus)39 Downloads (Pure)