Group





Hall B Scientific Staff Bios


Pierre Chatagnon


Pierre Chatagnon received a B.S. in Physics from the Université Paris-Sud in 2015, followed by an M.S. in engineering from Supélec in Paris in 2017 and in parallel an M.S. in Physics from the University of Cambridge. He received his Ph.D. in 2020 from the Université Paris-Saclay, where he worked at the IJCLab in Orsay. His Ph.D. work focused on two tasks, the deployment of the Central Neutron Detector of CLAS12 and the measurement of the Timelike Compton Scattering with CLAS12 data taken in 2018. The latter work lead to the first ever publication of Timelike Compton Scattering observables. In 2021, Pierre joined INFN Genova in Italy for his first postdoc to work on the CMS experiment at CERN. He participated in the development of the new CMS tracker for the future upgrade of the HL-LHC, and in a data analysis aiming at extracting the cross section of diffractive production of top quark pairs. Since September 2022, he has been a postdoc in Hall B at JLab. His current work involves the analysis of the CLAS12 data with the aim to extract the cross section of near-threshold J/Ψ photoproduction. He is part of the effort to develop a kinematic fitter for CLAS12 and new approach for track reconstruction based on Graph Neural Networks.

Current Responsibilities in Hall B:

  • Extraction of the cross section of the photoproduction of J/Ψ Near threshold
  • Extraction of the cross section of timelike Compton scattering on the proton
  • Development of novel tracking algorithms based on GNN

Selected Publications:

  • P. Chatagnon et al., "The CLAS12 Central Neutron Detector", Nucl. Instrum. Meth. A, 959, 163441 (2020).
  • P. Chatagnon et al. (CLAS Collaboration), "First Measurement of Timelike Compton Scattering", Phys. Rev. Lett., 127, 262501 (2021)