Abstract
In the search for exotic mesons, the GlueX Collaboration will soon extract moments of the angular distribution. In the perspective of these results, we generalize the formalism of moment extraction to the case in which the two mesons are produced with a linearly polarized beam and build a model for the reaction . The model includes resonant , , and waves in , produced by natural exchanges. Moments of the angular distribution are computed with and without the wave, to illustrate the sensitivity to exotic resonances. Although little sensitivity to the wave is found in moments of even angular momentum, moments of odd angular momentum are proportional to the interference between the wave and the dominant and waves. We also generalize the definition of the beam asymmetry for two mesons photoproduction and show that, when the meson momenta are perpendicular to the reaction plane, the beam asymmetry enhances the sensitivity to the exotic wave.
- Received 22 July 2019
DOI:https://doi.org/10.1103/PhysRevD.100.054017
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society