Group





Hall B Scientific Staff Bios


Eugene Pasyuk


Eugene Pasyuk graduated from the Moscow Engineering Physics Institute. He started his research career at the Joint Institute for Nuclear Research (JINR) in Dubna, first as a research associate, then as a research scientist, and then as the Group Leader. The focus of his research then was reactions with medium energy pions, pion-nucleon scattering, pion-nucleus scattering and absorption, and pion production by protons and heavy ions. He performed experiments at JINR, PNPI (Gatchina), and later at LAMPF and LANSCE (Los Alamos). In 1999 Eugene joined Arizona State University as a research professor and his research activity moved to experimental Hall B of Jefferson laboratory. At the same time, Eugene joined the CLAS Collaboration. He became the primary person responsible for the photon tagging spectrometer and supported all Hall B experiments with real photon beams. While at JLab, Eugene mentored all graduate students from ASU while they were in residence at JLab. In 2010 Eugene joined JLab as a staff scientist. He assumed a leading role in implementing new photoproduction experiments with polarized photons and polarized targets. This included the construction of the frozen spin target (FROST). He served as the principal investigator for this set of experiments. Besides CLAS-related activities, Eugene made a significant contribution to the PrimEx and PRad experiments. He has authored over 200 publications in refereed journals. He was chair of the Hadron Spectroscopy working group of the CLAS Collaboration. He also served on the JLab User's Group Board of Directors.

Current Responsibilities in Hall B:

  • Hall B beamline instrumentation and operation
  • Installation manager
  • Hall B safety training

Current Research Activities in Hall B:

  • E12-11-005A - Photoproduction of the very strangest baryons on a proton target in CLAS12 (aka Very Strange Experiment)
  • E12-20-004 - PRad-II: A New Upgraded High Precision Measurement of the Proton Charge Radius
  • E12-21-003 - A Direct Detection Search for Hidden Sector New Particles in the 3-60 MeV Mass Range
  • E12-22-003 - Precision Measurement of the Neutral Pion Transition Form Factor

Selected Publications:

  • David G. Ireland, Eugene Pasyuk, and Igor Strakovsky, "Photoproduction Reactions and Non-Strange Baryon Spectroscopy", Prog. Part. Nucl. Phys. 111, 103752 (2020).
  • I. Larin et al. (PrimEx Collaboration), "Precision Measurement of the Neutral Pion Lifetime", Science Vol. 368 Issue 6490, 506 (2020).
  • W. Xiong et al. (PRad Collaboration), "A Small Proton Charge Radius from an Electron–Proton Scattering Experiment", Nature Vol. 575 Issue 7781, 147 (2019).