Authors

P. Roy, University of Michigan - Ann Arbor
Z. Akbar, Florida State University
S. Park, Korea Atomic Energy Research Institute, South Korea
V. Crede, Florida State University
A. V. Anisovich, Universität Bonn, Germany
I. Denisenko, Universität Bonn, Germany
E. Klempt, Universität Bonn, Germany
V. A. Nikonov, Universität Bonn, Germany
A. V. Sarantsev, Universität Bonn, Germany
K. P. Adhikari, Mississippi State University
S. Adhikari, Florida International University
S. Anefalos Pereira, Instituto Nazionale di Fisica Nucleare, Italy
J. Ball, Université Paris-Saclay, France
I. Balossino, Instituto Nazionale di Fisica Nucleare, Italy
M. Bashkanov, Edinburgh University, UK
M. Battaglieri, Instituto Nazionale di Fisica Nucleare, Italy
V. Batourine, Thomas Jefferson National Accelerator Facility
I. Bedlinskiy, Institute of Theoretical and Experimental Physics, Russia
A. S. Biselli, Fairfield University
S. Boiarinov, Thomas Jefferson National Accelerator Facility
W. J. Briscoe, The George Washington University
J. Brock, Thomas Jefferson National Accelerator Facility
W. K. Brooks, Universidad Técnica Federico Santa María, Chile
V. D. Burkert, Thomas Jefferson National Accelerator Facility
C. Carlin, Thomas Jefferson National Accelerator Facility
D. S. Carman, Thomas Jefferson National Accelerator Facility
A. Celentano, Instituto Nazionale di Fisica Nucleare, Italy
G. Charles, Old Dominion University
T. Chetry, Ohio University
G. Ciullo, Università di Ferrara, Italy
Wesley P. Gohn, University of KentuckyFollow

Abstract

The photoproduction of ω mesons off the proton has been studied in the reaction γp using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target in Hall B at the Thomas Jefferson National Accelerator Facility. For the first time, the target asymmetry T has been measured in photoproduction from the decay ωπ+ππ0, using a transversely polarized target with energies ranging from just above the reaction threshold up to 2.8 GeV. Significant nonzero values are observed for these asymmetries, reaching about 30–40% in the third-resonance region. New measurements for the photon-beam asymmetry Σ are also presented, which agree well with previous CLAS results and extend the world database up to 2.1 GeV. These data and additional ω photoproduction observables from CLAS were included in a partial-wave analysis within the Bonn-Gatchina framework. Significant contributions from s-channel resonance production were found in addition to t-channel exchange processes.

Document Type

Article

Publication Date

5-4-2018

Notes/Citation Information

Published in Physical Review C, v. 97, issue 5, 055202, p. 1-14.

©2018 American Physical Society

The copyright holder has granted permission for posting the article here.

Due to the large number of authors, only the first 30 and the authors affiliated with the University of Kentucky are listed in the author section above. For the complete list of authors, please download this article or visit: https://doi.org/10.1103/PhysRevC.97.055202

This group of authors is collectively known as the CLAS Collaboration.

Digital Object Identifier (DOI)

https://doi.org/10.1103/PhysRevC.97.055202

Funding Information

This material is based upon work supported by the US Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-AC05-06OR23177. The group at Florida State University acknowledges additional support from the US Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-FG02-92ER40735. This work was also supported by the US National Science Foundation, the State Committee of Science of Republic of Armenia, the Chilean Comisión Nacional de Investigación Cientifica y Tecnológica (CONICYT), the Italian Istituto Nazionale di Fisica Nucleare, the French Centre National de la Recherche Scientifique, the French Commissariat a l’Energie Atomique, the Scottish Universities Physics Alliance (SUPA), the United Kingdom’s Science and Technology Facilities Council, and the National Research Foundation of Korea, the Deutsche Forschungsgemeinschaft (DFG) (SFB/TR110), and the Russian Science Foundation (RSF) under Grant No. 16-12-10267.

Related Content

See Supplemental Material at http://link.aps.org/supplemental/10.1103/PhysRevC.97.055202 for the numerical values of the presented data.

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