Group





Hall B Scientific Staff Bios


Daniel S. Carman


Daniel S. Carman received his B.S. (with honors) in physics in 1988 from Rensselaer Polytechnic Institute. He attended graduate school at Indiana University and completed his Ph.D. in 1995 on studies of N-N quasifree scattering at the Indiana University Cyclotron Facility. From 1995 to 1999 he was a postdoctoral associate in the medium energy group at Carnegie Mellon University. During this time, he focused on studies of hypernuclei at the AGS at Brookhaven Laboratory and began his involvement at Jefferson Laboratory working on the Hall B Region 1 drift chambers and commissioning the full drift chamber system. During this time he developed a research program primarily focusing on studies of the structure of excited nucleon states using strangeness electroproduction. In 1999 he joined the faculty in the Physics Department at Ohio University, where his research program focused on work in both Hall B and Hall D at Jefferson Lab. He was supported by research grants from the National Science Foundation and was awarded tenure in 2004. In 2006 he joined the Hall B staff. He has served as the Group Leader for the Hall B Time-of-Flight systems and has continued to expand his physics interests in the study of the spectrum and structure of the excited states of the nucleon. He has authored more than 250 papers in refereed journals and has been a lead author on more than 30 of these papers. He has written several review articles on nucleon resonance electroexcitation and served as the organizer of several international physics workshops and conferences. He served on the Hall D Collaboration Board from 2005-2006 and on the JLab User's Group Board of Directors in 2010-2011.

Current Responsibilities in Hall B:

  • Chair of the CLAS12 Calibration and Commissioning (CALCOM) group - oversees all CLAS12 detector subsystem calibrations
  • Group leader of the CLAS12 Forward Time-of-Flight (FTOF) system - responsible for online and offline detector calibrations, hardware repairs, documentation, system upgrades, expert on-call, detector performance studies
  • Group leader of the CLAS12 Central Time-of-Flight (CTOF) system - responsible for online and offline detector calibrations, hardware repairs, documentation, system upgrades, expert on-call, detector performance studies
  • CLAS12 high luminosity upgrade - overseeing TOF systems for luminosity increase
  • Hall B webpage webmaster - responsible for general upkeep of all Hall B web pages
  • Hall B Group Meeting - responsible for preparing minutes for weekly Hall B group meetings

Current Research Activities in Hall B:

  • E12-06-108A (RG-A) - Exclusive N* → KY Studies with CLAS12 (spokesperson/contact person)
  • E12-16-010A (RG-K) - Nucleon Resonance Structure Studies Via Exclusive KY Electroproduction at 6.6 GeV and 8.8 GeV (spokesperson/contact person)
  • E12-16-010 (RG-K) - A Search of Hybrid Baryons in Hall B with CLAS12 (spokesperson)
  • Hadron Structure Group:
    • RG-A measurement of inclusive electron scattering cross section
    • Developing program for studies of emergence of hadron mass in Hall B with an energy-doubled CEBAF accelerator to 22 GeV

Selected Publications:

  • V.I. Mokeev, D.S. Carman et al., "First Results on Nucleon Resonance Electroexcitation Amplitudes from ep → e'p'π+π- Cross Sections at W from 1.4–1.7 GeV and Q2 from 2.0–5.0 GeV2", Phys. Rev. C 108, 025204 (2023).
  • D.S. Carman, R.W. Gothe, V.I. Mokeev, and C.D. Roberts, "Nucleon Resonance Electroexcitation Amplitudes and Emergent Hadron Mass", Particles 6, 416 (2023).
  • V.I. Mokeev and D.S. Carman, "Photo- and Electrocouplings of Nucleon Resonances", Few Body Systems 63, 59 (2022).
  • D.S. Carman et al. (CLAS Collaboration), "Beam-Recoil Transferred Polarization in K+Y Electroproduction in the Nucleon Resonance Region with CLAS12", Phys. Rev. C 105, 065201 (2022).
  • D.S. Carman, K. Joo, and V.I. Mokeev, "Excited Nucleon Spectrum and Structure Studies with CLAS and CLAS12", Few Body Systems 61, 29 (2020).
  • P.T. Mattione, D.S. Carman et al. (CLAS Collaboration), "Differential Cross Section Measurements for γn → π-p Above the First Nucleon Resonance Region", Phys. Rev. C 96, 035204 (2017).
  • D.S. Carman et al. (CLAS Collaboration), "Separated Structure Functions for Exclusive K+Λ and K+Σ0 Electroproduction at 5.5 GeV at CLAS", Phys. Rev. C 87, 025204 (2013).
  • D.S. Carman et al. (CLAS Collaboration), "Beam-Recoil Polarization Transfer in the Nucleon Resonance Region in the Exclusive ep → e'K+Λ and ep → e'K+Σ0 Reactions", Phys. Rev. C 79, 065205 (2009).
  • R. Nasseripour, D.S. Carman et al. (CLAS Collaboration), "Polarized Structure Function σLT' for p(e,e'K+)Λ in the Nucleon Resonance Region", Phys. Rev. C 77, 065208 (2008).
  • P. Ambrozewicz, D.S. Carman et al. (CLAS Collaboration), "Separated Structure Functions for the Exclusive Electroproduction of K+Λ and K+Σ0 Final States", Phys. Rev. C 75, 045203 (2007).
  • S. Stepanyan, D.S. Carman et al. (CLAS Collaboration), "Observation of an Exotic S=+1 Baryon in Exclusive Photoproduction from the Deuteron", Phys. Rev. Lett. 91, 252001 (2003).
  • D.S. Carman et al. (CLAS Collaboration), "First Measurement of Transferred Polarization in the Exclusive ep → e'K+Λ Reaction", Phys. Rev. Lett. 90, 131804 (2003).