Abstract
The γd→K+K-pn reaction has been studied to search for the evidence of the Θ+ by detecting K+K- pairs at forward angles. The Fermi-motion-corrected nK+ invariant mass distribution shows a narrow peak at 1.524±0.002+0.003 GeV/c2. The statistical significance of the peak calculated from a shape analysis is 5.1 σ, and the differential cross section for the γn→K-Θ+ reaction is estimated to be 12±2 nb/sr in the photon energy range from 2.0 to 2.4 GeV in the LEPS angular range by assuming the isotropic production of the Θ+ in the γn center-of-mass system. The obtained results support the existence of the Θ+.
Original language | English |
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Article number | 025210 |
Journal | Physical Review C - Nuclear Physics |
Volume | 79 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2009 Feb 2 |
Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics