7–9 oct. 2026
IMT Atlantique
Fuseau horaire Europe/Paris

The proton charge radius puzzle: observation, bias and scientific rigor.

7 oct. 2026, 14:20
30m
Amphi G.Besse (IMT Atlantique)

Amphi G.Besse

IMT Atlantique

4 rue Alfred Kastler 44307 Nantes cedex 3

Orateur

Adam HOBALLAH (IJCLab CNRS-IN2P3)

Description

The repeated measurements of the proton charge radius have led to more precise estimations of this essential quantity in physics. However, driven by the same attempt to improve the precision of the measurements of the radius, researchers unintentionally tend to validate previous findings leading in some cases to inconsistencies. The proton radius puzzle constitutes a clear example of how observational bias can alter physics measurements. This talk will give a brief history of the proton charge radius measurements and will focus on recent measurements showing how these extractions were strongly biased by the ones obtained by previous experiments. I will discuss how equally valid assumptions on the extraction of the radius can strongly influence the obtained results arguing that these assumptions are to be considered as sources of systematic errors. I will then discuss recent developments from experimental side and expected new measurements and will eventually discuss our contribution on the phenomenological side that we did at IJCLab in Orsay.

Working Group WG0. Inter WG or Interdisciplinary
Type of oral contribution Experiment

Auteur

Adam HOBALLAH (IJCLab CNRS-IN2P3)

Documents de présentation