Measurement of the photon beam asymmetry in γ - p→K+ ς0 at Eγ=8.5 GeV

COMPASS Collaboration

Research output: Contribution to journalArticle

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.

Original languageEnglish
Article number065206
JournalPhysical Review C
Volume101
Issue number6
DOIs
Publication statusPublished - Jun 2020

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Measurement of the photon beam asymmetry in γ - p→K+ ς0 at Eγ=8.5 GeV'. Together they form a unique fingerprint.

  • Cite this