Measurement of the near-threshold J / ψ photoproduction cross section with the CLAS12 experiment

@article{chatagnon2026measurement,
  title = {{Measurement of the near-threshold J / ψ photoproduction cross section with the CLAS12 experiment}},
  author = {P. Chatagnon and V. Kubarovsky and R. Paremuzyan and S. S. Stepanyan and M. Tenorio and R. Tyson and Akalin Acar and P. Achenbach and J. S. Alvarado and M. J. Amaryan and W.R. Armstrong and H. Avakian and N. A. Baltzell and L. Barion and M. Bashkanov and M. Battaglieri and F Benmokhtar and A. Bianconi and A. S. Biselli and S. Boiarinov and M. Bondi and F. Bossù and K.-Th. Brinkmann and W. J. Briscoe and S. Bueltmann and V. D. Burkert and T. Cao and D. S. Carman and A. Celentano and H. Chinchay and G. Ciullo and P. L. Cole and A. D’Angelo and N. Dashyan and M. Defurne and R. DE VITA and ALEXANDRE DEUR and S. Diehl and C. Dilks and Chaden Djalali and M. Dugger and Raphaël Dupré and H. Egiyan and M. Ehrhart and A. El Alaoui and L. El Fassi and L. Elouadrhiri and M. Farooq and S. Fegan and R. F. Ferguson and I.P Fernando and E. Ferrand and A. Filippi and C. Fogler and K. Gates and G. P. Gilfoyle and D. I. Glazier and R. W. Gothe and Y. Gotra and B. Gualtieri},
  journal = {Physical Review C},
  year = {2026},
  month = may,
  doi = {10.1103/lqv1-kf2n},
  url = {https://doi.org/10.1103/lqv1-kf2n},
  note = {CC BY},
}

TY  - JOUR
TI  - Measurement of the near-threshold J / ψ photoproduction cross section with the CLAS12 experiment
AU  - P. Chatagnon
AU  - V. Kubarovsky
AU  - R. Paremuzyan
AU  - S. S. Stepanyan
AU  - M. Tenorio
AU  - R. Tyson
AU  - Akalin Acar
AU  - P. Achenbach
AU  - J. S. Alvarado
AU  - M. J. Amaryan
AU  - W.R. Armstrong
AU  - H. Avakian
AU  - N. A. Baltzell
AU  - L. Barion
AU  - M. Bashkanov
AU  - M. Battaglieri
AU  - F Benmokhtar
AU  - A. Bianconi
AU  - A. S. Biselli
AU  - S. Boiarinov
AU  - M. Bondi
AU  - F. Bossù
AU  - K.-Th. Brinkmann
AU  - W. J. Briscoe
AU  - S. Bueltmann
AU  - V. D. Burkert
AU  - T. Cao
AU  - D. S. Carman
AU  - A. Celentano
AU  - H. Chinchay
AU  - G. Ciullo
AU  - P. L. Cole
AU  - A. D’Angelo
AU  - N. Dashyan
AU  - M. Defurne
AU  - R. DE VITA
AU  - ALEXANDRE DEUR
AU  - S. Diehl
AU  - C. Dilks
AU  - Chaden Djalali
AU  - M. Dugger
AU  - Raphaël Dupré
AU  - H. Egiyan
AU  - M. Ehrhart
AU  - A. El Alaoui
AU  - L. El Fassi
AU  - L. Elouadrhiri
AU  - M. Farooq
AU  - S. Fegan
AU  - R. F. Ferguson
AU  - I.P Fernando
AU  - E. Ferrand
AU  - A. Filippi
AU  - C. Fogler
AU  - K. Gates
AU  - G. P. Gilfoyle
AU  - D. I. Glazier
AU  - R. W. Gothe
AU  - Y. Gotra
AU  - B. Gualtieri
PY  - 2026
DA  - 2026/05/20
JO  - Physical Review C
DO  - 10.1103/lqv1-kf2n
UR  - https://doi.org/10.1103/lqv1-kf2n
AB  - We present measurements of the total and differential cross sections for near-threshold J / ψ photoproduction obtained with the CLAS12 detector at the Thomas Jefferson National Accelerator Facility. The results are based on data collected during the fall 2018 and spring 2019 running periods, using electron beams with energies of 10.6 and 10.2 GeV, respectively, scattered off a liquid-hydrogen target. Near-threshold J / ψ photoproduction offers a unique sensitivity to the strong interaction in the nonperturbative regime of quantum chromodynamics (QCD). The energy dependence of the cross section constrains the underlying J / ψ production mechanisms, including multigluon exchange and potential baryonic excitations. Additionally, the t dependence of the differential cross section can be related to the transverse spatial distribution of gluons in the proton, providing critical input for theoretical descriptions of the gluonic structure of the proton. An interpretation of the results in terms of the gluon content of the proton is presented, providing new experimental constraints on QCD-inspired models of the proton structure and the role of gluonic degrees of freedom in hadronic mass generation.
SN  - 0556-2813
SN  - 1089-490X
SN  - 1538-4497
SN  - 2469-9985
SN  - 2469-9993
SN  - 2470-0002
ER  -