Search for an exotic S =-2, Q =-2 baryon resonance at a mass near 1862 MeV in quasireal photoproduction
Search for an exotic S =-2, Q =-2 baryon resonance at a mass near 1862 MeV in quasireal photoproduction
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DOI：
10.1103/physrevd.71.032004
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发表时间：
2004-12
影响因子：
5
通讯作者：
H. C. A. Airapetian;E. al.
中科院分区：
文献类型：
--
作者：
H. C. A. Airapetian;E. al.
通过衰变通道 {xi}{sup -}{pi}{sup -}{yields}{lambda}{pi}{sup -}{pi}{sup -}{yields}p{pi}{sup -}{pi}{sup -}{pi}{sup -}，在氘靶上进行了准真实光生产中对 S=-2、Q=-2 的奇异重子共振的搜索。在 {xi}{sup -}{pi}{sup -} 不变质谱中没有发现先前报道的 {xi}{sup --}(1860) 共振的证据。在 90% 置信水平下发现照片制作横截面的上限为 2.1 nb。 {xi}{sup 0}(1530) 的照片制作横截面被发现在 9 到 24 nb 之间。
A search for an exotic baryon resonance with S=-2, Q=-2 has been performed in quasireal photoproduction on a deuterium target through the decay channel {xi}{sup -}{pi}{sup -}{yields}{lambda}{pi}{sup -}{pi}{sup -}{yields}p{pi}{sup -}{pi}{sup -}{pi}{sup -}. No evidence for a previously reported {xi}{sup --}(1860) resonance is found in the {xi}{sup -}{pi}{sup -} invariant mass spectrum. An upper limit for the photoproduction cross section of 2.1 nb is found at the 90% confidence level. The photoproduction cross section for the {xi}{sup 0}(1530) is found to be between 9 and 24 nb.