PhD Day 2026

Liste des Contributions

12. Detector R&D for Future High-Energy Colliders: Instrumentation and Deep Learning Developments for the Timing-SDHCAL

William VAGINAY (CNRS - IP2I)

23/04/2026 09:30

Infiniment petit

As a brief introduction, the Semi Digital Hadronic Calorimeter (SDHCAL) is a concept of a gaseous hadronic calorimeter based on Resistive Plate Chamber (RPC) technology, originally designed for the future linear collider ILC. In the context of future circular colliders such as FCC and CEPC, an upgraded version - the Timing-SDHCAL (T-SDHCAL) - is currently under development. It incorporates...

2. Non-perturbative aspects of supersymmetric gauge theories

Timothé ALEZRAA

23/04/2026 10:00

Théorie

Quantum field theories are currently our best framework to modelize fundamental interactions. While perturbative approaches in most theories are successful, non-perturbative effects need to be included to understand these theories at all scales, however this is technically very difficult. Gauge theories engineered from string theory are a rich class of examples in which powerful methods are...

3. Preliminary measurement of the germanium ionisation yield and first studies of the new silicon crystal detectors of the Ricochet experiment

Tatiana LE BELLEC (IP2I)

23/04/2026 10:30

Infiniment grand

Coherent elastic neutrino nucleus scattering (CEvNS) was first measured experimentally by the COHERENT experiment in 2017 and is currently being studied by many experiments all around the world. In this context, the Ricochet international collaboration aims to detect the CEvNS process in order to search for new physics. The detectors used are germanium crystals operated at cryogenic...

4. Study of the influence of radiolysis of an aqueous solution at the interface with 316L stainless-steel

brice lathuiliere

23/04/2026 11:15

Pluridisciplinaire

The objective of my thesis is to investigate the effect of charged particle induced-radiolysis on the evolution of the passive film formed at the 316L stainless steel/electrolyte interface. This thin passive film (few nanometers thick) exhibits a duplex structure: an inner dense layer rich in chromium oxide, which ensures corrosion protection, and an outer amorphous layer of iron hydroxide...

5. Searches for CP violation in the top-quark sector with CMS at the LHC, CPT violation phenomenology, and Tracker Endcap metrology for the HL-LHC upgrade.

Enzo FILLAUDEAU (IP2I, Lyon)

23/04/2026 11:45

Infiniment petit

My thesis investigates new sources of CP violation in the top-quark sector within the CMS collaboration at the LHC, addressing the matter–antimatter asymmetry. Exploiting the top quark’s large mass as a probe of beyond-the-Standard-Model physics, the analysis uses Run 2 data at 13 TeV. The single top t-channel process is used to probe CPV within an
Effective Field Theory framework. A...

8. Linking ion interaction processes to biological effects in hadrontherapy with the NanOx biophysical model

Camila STRUBBIA MANGIARELLI (IP2I)

23/04/2026 14:15

Pluridisciplinaire

Accurate biological dose calculation in hadrontherapy remains a major challenge due to the complexity of inelastic processes governing energy deposition at the microscopic scale. My thesis project aims to improve biological dose modeling by establishing a direct link between ion-matter interactions and the predictions of the NanOx biophysical model. The work involves calculating ionization,...

6. Cosmological implication of the joint observation of Gravitational Waves and Type Ia Supernovae

Léo Zimmermann (Onde Gravitationelle, Cosmologie)

23/04/2026 14:45

Infiniment grand

The expansion of the Universe is well established, yet the current value of the Hubble constant, H0,
remains a subject of ongoing debate. Direct measurements based on Type Ia supernovae and Cepheid variables yield values significantly higher than those inferred from early-Universe observations of the cosmic microwave background, dating back approximately 13 billion years.

An independent...

7. Enhancing MBTA Efficiency and Template Banks Generation for Sub-Solar-Mass Black Hole Searches

Gaspard Joubert

23/04/2026 15:15

Infiniment grand

9. Search for CP-violation in ttH multilepton process

Giorgio Mauceri

23/04/2026 16:00

Infiniment petit

The top quark (t) is unique among the other quarks for a variety of reasons, among which its high coupling with the Higgs boson (H). This high coupling constant is suspected to be possibly tied to Beyond Standard Model physics, such as the possibilty of a break in CP-simmetry. My thesis has the objective of investigating this hypothesis by studying the ttH process within the CMS collaboration...

10. H → γγ search at low mass with CMS & Electroweak precision test of BSM theories for future colliders

Christian Verollet (IP2I Lyon France)

23/04/2026 16:30

Infiniment petit

The first part of my thesis is dedicated to the search for a low-mass resonance around 95 GeV in the di-photon channel with the CMS experiment. In addition to the search, I will also present an update of the S-method for the extraction of the photon energy scale calibration with Z → µ+µ−γ events.
The second part is focused on the electroweak (EW) precision test of specific
BSM theories for...

11. Nuclear structure: from mean-field to beyond mean-field calculations

Valentin Guillon (IP2I, Université Claude Bernard Lyon 1)

23/04/2026 17:00

Théorie

Nuclear structure calculations aim to describe elementary properties of atomic nuclei. Solving the Schrödinger equation for such a system is, however, computationally expensive, which prevents us from performing exact calculations. Several assumptions can be made in order to make numerical computations tractable. I will discuss the self-consistent mean-field model that has become a cornerstone...