Document Type
Article
Publication Date
2020
DOI
10.1103/PhysRevC.102.032201
Publication Title
Physical Review C
Volume
102
Issue
3
Pages
7 pp.
Abstract
We present the first measurement of the reaction 𝛾p -> a₂(1320)⁰ p in the photon energy range 3.5-5.5 GeV and four-momentum transfer squared 0.2 < -t < 2.0 GeV2. Data were collected with the CEBAF Large Acceptance Spectrometer detector at the Thomas Jefferson National Accelerator Facility. The a2resonance was detected by measuring the reaction 𝛾p → π0ηp and reconstructing the π0η invariant mass. The most prominent feature of the differential cross section is a dip at -t ≈ 0.55 GeV2. This can be described in the framework of Regge phenomenology, where the exchange degeneracy hypothesis predicts a zero in the reaction amplitude for this value of the four-momentum transfer.
Original Publication Citation
Celentano, A., Battaglieri, M., De Vita, ... Zachariou, N., Zhang, J., Zhao, Z. W., et al. CLAS Collaboration (2020). First measurement of direct photoproduction of the a₂(1320)⁰ meson on the proton. Physical Review C, 102(3), 7 pp., Article 032201. https://doi.org/10.1103/PhysRevC.102.032201
Repository Citation
Adhikari, K.P.; Amaryan, M. J.; Bullumulla, D.; Hauenstein, F.; Khachatryan, M.; Prok, Y.; et al.; and CLAS Collaboration, "First Measurement of Direct Photoproduction of the a2(1320)⁰ Meson on the Proton" (2020). Physics Faculty Publications. 453.
https://digitalcommons.odu.edu/physics_fac_pubs/453
Comments
"Yes, the author or the author's employer may use all or part of the APS published article, including the APS-prepared version (e.g., the PDF from the online journal) without revision or modification, on the author's or employer's website as long as a fee is not charged. If a fee is charged, then APS permission must be sought. In all cases, the appropriate bibliographic citation and notice of the APS copyright must be included."
© American Physical Society.
Publisher's version available at: https://doi.org/10.1103/PhysRevC.102.032201