期刊
PHYSICAL REVIEW C
卷 101, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.101.065206
关键词
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资金
- US Department of Energy
- US National Science Foundation
- German Research Foundation
- GSI Helmholtzzentrum fur Schwerionenforschung GmbH
- Natural Sciences and Engineering Research Council of Canada
- Russian Foundation for Basic Research
- UK Science and Technology Facilities Council
- Chilean Comision Nacional de Investigacion Cientifica y Tecnologica
- National Natural Science Foundation of China
- China Scholarship Council
- US Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC05-06OR23177]
- STFC [ST/P004458/1] Funding Source: UKRI
We report measurements of the photon beam asymmetry Sigma for the reaction (gamma) over right arrowp -> K+Sigma(0) (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 Sigma was measured as a function of the Mandelstam variable t, and a single value of Sigma was extracted for events produced in the u channel. These are the first exclusive measurements of the photon beam asymmetry Sigma 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 Sigma = 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 Sigma = 0 .41 +/- 0 .09 is obtained for the u channel integrated up to -u = 2 .0 (GeV/c)(2).
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