Particle physics. Machine learning. ATLAS.
I am a Fellow of the Alexander von Humboldt Foundation, hosted by the University of Göttingen. My research focuses on searching for new physics at the Large Hadron Collider with the ATLAS experiment, using precision measurements of the top quark and machine learning tools.
PhD in Experimental Particle Physics, 2020
University of Sheffield (UK)
Part III Maths, 2016
University of Cambridge, DAMTP (UK)
BSc in Physics & Philosophy, 2015
King's College London (UK)
- psychology Machine Learning
- insights Likelihood-free Inference
- filter_tilt_shift Anomaly detection
- blur_on Effective Field Theory
- join_inner Quantum entanglement
Experience
My research focuses on the electroweak couplings of the top quark: $t\bar{t}Z$, $tZq$, $tWZ$ and $t\bar{t}\gamma$. Besides my contributions to the measurement of these Standard Model processes with the ATLAS experiment, I lead their interpretation in the framework of Effective Field Theory. With colleagues from the CMS collaboration, I am preparing the very first cross-experiment combination of top+X results. Last but not least, I am studying quantum entanglement and the violation of Bell’s inequalities in top quarks and Higgs bosons.
Other responsibilities include:
I led the legacy $t\bar{t}Z$ ATLAS measurement and contributed to the first measurement of the $t\bar{t}$ spin density matrix with the full Run 2 dataset; for both analyses, I developed an extensive Effective Field Theory fitting framework in the Julia language. I was also involved in background estimations for a combination of Dark Matter searches with $t\bar{t}+E_\mathrm{T}^\mathrm{miss}$ signatures, as well as prototyping an auto-encoder for an Anomaly Detection based search for new physics.
Other responsibilities included:
- Supervision of MSc and PhD students
- Summarising ATLAS and CMS $t\bar{t}+X$ results for the LHC Top working group
- Supporting the ATLAS Top group in Monte Carlo generation
- Acting as ATLAS Trigger online expert and online release coordinator
- Funding assistance for UK HEP workshops
- Organisation of the yearly Astrophysics + HEP conference
- Liaison with UK students
- Outreach activities
Meet the team!
Main collaborators
James Howarth
University of Glasgow
University Research Fellow (Royal Society)
Quantum entanglement
Jonathan Jamieson
University of Glasgow
Postdoc (quantumTANGO)
Quantum entanglement
Steffen Korn
University of Göttingen
Postdoc (quantumTANGO)
Quantum entanglement
Arnulf Quadt
University of Göttingen
Professor of Experimental Particle Physics
Top physics
Elizaveta Shabalina
University of Göttingen
Senior Researcher
Top physics
PhD students
Stephen Eggebrecht
$t\bar{t}H$ in the $4\ell$ channel
(post-doctoral supervision for Prof. Arnulf Quadt)
Sreelakshmi Sindhu
EFT in top+X processes
(post-doctoral supervision for Prof. Arnulf Quadt)
MSc students
Clinton Gonsalves
$t\bar{t}H(\to WW^*)$ with 1 lepton
Sebastian Preuth
$t\bar{t}Z$ and $tZq$
Ireas Tom Raschke
$t\bar{t}H(\to WW^*)$ with 1 lepton
BSc 2022 $t\bar{t}Z$ and $t\bar{t}W$
Theresa Reisch
$t\bar{t}$ quantum entanglement
BSc 2022 $t\bar{t}$ spin correlations
Tim Schlömer
ML for lepton isolation
BSc 2022 $tZq$ EFT
Daniel Werner
Run 3 software development
BSc 2022 $tZq$ polarisation
Alumni
Siemen Aulich
Quantum entanglement in $H^*\to ZZ$
BSc 2023
George Dialektakis
Anomaly detection
CERN / Google Summer of Code 2021
Honey Gupta
Anomaly detection
CERN / Google Summer of Code 2020, then Applied Scientist at Amazon
Tobias Henne
$t\bar{t}$ modelling for entanglement
BSc 2023
Sophia Pennuttis
Background modelling in $t\bar{t}\gamma\gamma$
BSc 2022
Varsha Senthilkumar
Machine learning in SUSY
MSc 2019, then PhD IFIC Valencia
Hassan Shahid
Anomaly detection
MSc 2021-2022
Craig Shewry
EFT & machine learning
MSc 2021-2022
Ethan Simpson
PhD 2023 EFT & spin correlations, then Post-Doc Manchester
(post-doctoral supervision for James Howarth)
Marija Vaškevičiūtė
Anomaly detection
MSc 2020–2021, then PhD Glasgow
Kia-Jung Yang
2023 Graph neural networks
BSc 2022 $t\bar{t}Z$ and $tZq$
Recent &
Upcoming Talks
Featured Publications
Recent Publications
Get in touch
- baptiste.ravina@cern.ch
-
II. Physikalisches Institut
Friedrich-Hund-Platz 1
Göttingen, D-37077
Germany - Office D.01.121
- DM Me
- Skype Me