Document Type

Article

Publication Date

12-2019

DOI

10.1103/PhysRevC.100.052201

Publication Title

Physical Review C

Volume

5

Pages

052201(R) (1-7 pp.)

Abstract

We report on the measurement of the beam asymmetry Σ for the reactions →γp→pη and →γp→pη′ from the GlueX experiment using an 8.2–8.8-GeV linearly polarized tagged photon beam incident on a liquid hydrogen target in Hall D at Jefferson Laboratory. These measurements are made as a function of momentum transfer −t with significantly higher statistical precision than our earlier η measurements and are the first measurements of η′ in this energy range. We compare the results to theoretical predictions based on t-channel quasiparticle exchange. We also compare the ratio of Ση to Ση′ to these models as this ratio is predicted to be sensitive to the amount of s¯s exchange in the production. We find that photoproduction of both η and η′ is dominated by natural parity exchange with little dependence on −t.

Comments

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.

Original Publication Citation

Adhikari, S., Ali, A., Amaryan, M., Austregesilo, A., Barbosa, F., Barlow, J., . . . Glue, X. C. (2019). Beam asymmetry Σ for the photoproduction of η and ή mesons at Eγ =8.8 GeV. Physical Review C, 100(5), 052201(R) doi:10.1103/PhysRevC.100.052201

ORCID

0000-0002-5648-0256 (Amaryan)

Included in

Nuclear Commons

Share

COinS