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Measurement of the g p -> K⁰ Sigma^+ reaction with the Crystal Ball/TAPS detectors at the Mainz Microtron

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arxiv 1306.1243 v3 pith:VWTV6TA4 submitted 2013-06-05 hep-ex nucl-ex

Measurement of the g p -> K⁰ Sigma^+ reaction with the Crystal Ball/TAPS detectors at the Mainz Microtron

classification hep-ex nucl-ex
keywords reactionsigmaresultsballcrystaldatamainzmeasured
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The g p -> K^0 Sigma^+ reaction has been measured from threshold to Eg=1.45 GeV (W_cm=1.9 GeV) using the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. In the present experiment, this reaction was searched for in the 3pi^0 p final state, by assuming K^0_S -> pi^0 pi^0 and Sigma^+ -> pi^0 p. The experimental results include total and differential cross sections as well as the polarization of the recoil hyperon. The new data significantly improve empirical knowledge about the g p -> K^0 Sigma^+ reaction in the measured energy range. The results are compared to previous measurements and model predictions. It is demonstrated that adding the present g p -> K^0 Sigma^+ results to existing data allowed a better description of this reaction with various models.

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