About

My name is Dimitrios (but most people call me Dimitris) Ntounis [/di-MEE-tris DOO-nis/] and I come from Athens, Greece. I am currently a PhD Candidate in the Physics Department at Stanford University. I am a researcher at SLAC National Accelerator Laboratory working with the SLAC ATLAS group. I’m also pursuing a PhD Minor in Computer Science at Stanford.

You can find a few key points about me below or read my Projects page or CV for more details.

Education

  • PhD in Physics, Stanford University, in progress
  • PhD Minor in Computer Science, Stanford University, requirements completed (degree conferred with PhD)
  • MSc in Physics, Stanford University, 2024
  • BSc in Physics, National and Kapodistrian University of Athens, 2021

Research Interests

  • Higgs Boson Physics with the ATLAS experiment at the CERN LHC
  • Future electron-positron colliders
  • Machine Learning for Science

Research

My research lies at the intersection of experimental particle physics, accelerator science, and machine learning. I am driven by a fundamental question: What are the building blocks of the Universe, and how do they interact?

Higgs Boson Physics at the LHC: I analyze petabyte-scale datasets from the ATLAS detector at CERN’s Large Hadron Collider (LHC) to probe the properties of the Higgs boson—the particle intimately tied to the mechanism that gives fundamental particles their mass. My work focuses on precision measurements of Higgs production in association with vector bosons, using advanced statistical techniques to extract signals from challenging backgrounds.

Next-Generation Colliders: Looking beyond the LHC, I contribute to the development of future electron-positron colliders designed to achieve unprecedented precision in Higgs, electroweak, and top quark measurements. My contributions include comprehensive studies of the beam dynamics, luminosity optimization, and beam-induced background characterization for the Cool Copper Collider (C³), a newly proposed US-led linear collider concept. I also benchmark jet flavor tagging algorithms across different detector configurations to inform optimal detector design.

AI/ML for Discovery: I leverage state-of-the-art machine learning techniques to extract maximum physics insight from available data. This includes developing novel algorithms for particle identification that enhance our sensitivity to new physics signatures.

In the News

Research Network

Interactive visualization of my research collaborations from INSPIRE-HEP. Excludes large collaboration papers (ATLAS/CMS) to show individual co-authors.

- papers - collaborators - citations
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D. Ntounis Collaborators Frequent (3+ papers)

Showing individual co-authors only. Papers with >20 authors (ATLAS/CMS) are excluded.

From the Blog

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Interested in collaborating or have questions? Get in touch or schedule a meeting.

Recent News

Jul 13, 2026 At Princeton University for the CoDaS-HEP 2026 Computational and Data Science school for HEP.
Jun 8, 2026 In Helsinki for FCC Week 2026, presenting a poster on beam-induced background occupancy studies at FCC-ee.
Jun 1, 2026 Attending the ML4FP 2026 Machine Learning for Fundamental Physics summer school at Georgia Tech in Atlanta.
May 29, 2026 My paper GuineaGrad: A Differentiable Beam-Beam Interaction Simulator for Gradient-Based Collider Optimization was accepted at the ICML 2026 Workshop AI4Physics.
Apr 28, 2026 Passed my 4th-year oral exam with my dissertation reading committee.
Feb 11, 2026 Our paper on Beam-Beam Backgrounds for the Cool Copper Collider was published in JINST!
Apr 5, 2025 Co-awarded the Breakthrough Prize in Fundamental Physics as a member of both the ATLAS and CMS collaborations!
Nov 2024 Back in Europe for two weeks for the C³ workshop in Amsterdam, the ECFA workshop in Paris and a week-long stay at CERN.
Aug 13, 2024 Successfully passed my PhD qualifying exam with distinction — officially advancing to candidacy.
Jul 2024 In Tokyo for a week for the LCWS 2024 conference.