Measurement of the $\vecγ p \to K^+ Λ$ Reaction at Backward Angles

Details Measurement of the $\vecγ p \to K^+ Λ$ Reaction at Backward Angles Measurement of the $\vecγ p \to K^+ Λ$ Reaction at Backward Angles

2007-07-30

arxiv.org/abs/0707.4412v1

Phys. Rev. C 76, 042201 (2007)

Physics

Nuclear Physics

Nuclear Experiment

6 figures, submitted to PRC rapid communications

Scientific paper

10.1103/PhysRevC.76.042201

Cross sections for the $\gamma p \to K^+ \Lambda$ have been measured at backward angles using linearly polarized photons in the range 1.50 to 2.37 GeV. In addition, the beam asymmetry for this reaction has been measured for the first time at backward angles. The $\Lambda$ was detected at forward angles in the LEPS spectrometer via its decay to $p\pi^-$ and the K^+ was inferred using the technique of missing mass. These measurements, corresponding to kaons at far backward angles in the center-of-mass frame, complement similar CLAS data at other angles. Comparison with theoretical models shows that the reactions in these kinematics provide further opportunities to investigate the reaction mechanisms of hadron dynamics.

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