### Abstract

Differential cross sections and photon-beam asymmetries have been measured for the γ→n→K+Σ- and γ→p→K+Σ0 reactions separately using liquid deuterium and hydrogen targets with incident linearly polarized photon beams of Eγ=1.5-2.4GeV at 0. 6<cos¡ΘcmK<1. The cross section ratio of σK+Σ-/ σK+Σ0, expected to be 2 on the basis of the isospin 1/2 exchange, is found to be close to 1. For the K+Σ- reaction, large positive asymmetries are observed, indicating the dominance of K* exchange. The large difference between the asymmetries for the K+Σ- and K+Σ0 reactions cannot be explained by simple theoretical considerations based on Regge model calculations.

Original language | English |
---|---|

Article number | 082003 |

Journal | Physical Review Letters |

Volume | 97 |

Issue number | 8 |

DOIs | |

Publication status | Published - 31 Aug 2006 |

## Fingerprint Dive into the research topics of 'Differential cross section and photon-beam asymmetry for the γ→n→K+Σ- Reaction at Eγ=1.5-2.4GeV'. Together they form a unique fingerprint.

## Cite this

*Physical Review Letters*,

*97*(8), [082003]. https://doi.org/10.1103/PhysRevLett.97.082003