(2020) First measurement of direct photoproduction of the a2(1320)0 meson on the proton. Physical Review C. 032201. ISSN 2469-9993
Abstract
We present the first measurement of the reaction γp→a2(1320)0p in the photon energy range 3.5-5.5GeV and four-momentum transfer squared 0.2<-t<2.0GeV2. Data were collected with the CEBAF Large Acceptance Spectrometer detector at the Thomas Jefferson National Accelerator Facility. The a2 resonance 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≈0.55GeV2. 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.
Metadata
Copyright, Publisher and Additional Information: | ©2020 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details | ||||
---|---|---|---|---|---|
Dates: |
|
||||
Institution: | The University of York | ||||
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) | ||||
Funding Information: |
|
||||
Depositing User: | Pure (York) | ||||
Date Deposited: | 05 Nov 2020 17:30 | ||||
Last Modified: | 06 Jan 2024 00:46 | ||||
Published Version: | https://doi.org/10.1103/PhysRevC.102.032201 | ||||
Status: | Published | ||||
Refereed: | Yes | ||||
Identification Number: | https://doi.org/10.1103/PhysRevC.102.032201 | ||||
Related URLs: |