@article{2e69f64c23984f5a81ec6621cbaec044,
title = "Measurement of the photon beam asymmetry in γ - p→K+ ς0 at Eγ=8.5 GeV",
abstract = "We report measurements of the photon beam asymmetry ς for the reaction γ - p→K+ς0(1193) using the GlueX spectrometer in Hall D at Jefferson Lab. Data were collected by using a linearly polarized photon beam in the energy range of 8.2-8.8 GeV incident on a liquid hydrogen target. The beam asymmetry ς was measured as a function of the Mandelstam variable t, and a single value of ς was extracted for events produced in the u channel. These are the first exclusive measurements of the photon beam asymmetry ς for the reaction in this energy range. For the t channel, the measured beam asymmetry is close to unity over the t range studied, -t=(0.1-1.4)(GeV/c)2, with an average value of ς=1.00±0.05. This agrees with theoretical models that describe the reaction via the natural-parity exchange of the K∗(892) Regge trajectory. A value of ς=0.41±0.09 is obtained for the u channel integrated up to -u=2.0 (GeV/c)2. ",
author = "{COMPASS Collaboration} and S. Adhikari and A. Ali and M. Amaryan and A. Austregesilo and F. Barbosa and J. Barlow and E. Barriga and R. Barsotti and Beattie, {T. D.} and Berdnikov, {V. V.} and T. Black and W. Boeglin and Briscoe, {W. J.} and T. Britton and Brooks, {W. K.} and Cannon, {B. E.} and N. Cao and E. Chudakov and S. Cole and O. Cortes and V. Crede and Dalton, {M. M.} and T. Daniels and A. Deur and S. Dobbs and A. Dolgolenko and R. Dotel and M. Dugger and R. Dzhygadlo and H. Egiyan and T. Erbora and A. Ernst and P. Eugenio and C. Fanelli and S. Fegan and Foda, {A. M.} and J. Foote and J. Frye and S. Furletov and L. Gan and A. Gasparian and C. Gleason and K. Goetzen and A. Goncalves and Goryachev, {V. S.} and L. Guo and H. Hakobyan and A. Hamdi and Huber, {G. M.} and V. Lyubovitskij",
note = "Funding Information: We would like to acknowledge the outstanding efforts of the staff of the Accelerator and the Physics Division at Jefferson Lab that made the experiment possible. We appreciate useful communication with Jan Ryckebusch, Michel Guidal, and Gary Goldstein. This work was supported in part by the US Department of Energy, the US National Science Foundation, the German Research Foundation, GSI Helmholtzzentrum f{\"u}r Schwerionenforschung GmbH, the Natural Sciences and Engineering Research Council of Canada, the Russian Foundation for Basic Research, the UK Science and Technology Facilities Council, the Chilean Comisi{\'o}n Nacional de Investigaci{\'o}n Cient{\'i}fica y Tecnol{\'o}gica, the National Natural Science Foundation of China and the China Scholarship Council. This material is based upon work supported by the US Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.",
year = "2020",
month = jun,
doi = "10.1103/PhysRevC.101.065206",
language = "English",
volume = "101",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "American Physical Society",
number = "6",
}