Search for exotic baryons at HERMES

被引：0
|
作者：
W. Deconinck
机构：
[1] University of Michigan,Randall Laboratory of Physics
来源：
The European Physical Journal A | 2007年 / 31卷
关键词：
12.39.Mk Glueball and nonstandard multi-quark/gluon states; 13.60.-r Photon and charged-lepton interactions with hadrons; 13.60.Rj Baryon production; 14.20.-c Baryons (including antiparticles);
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摘要：
An experimental search for the Θ(1540)- and Λ(1520)-resonance was performed in quasi-real photoproduction on deuterium at the HERMES experiment. While evidence for Θ(1540) was found in the decay channel pK0S→pπ+π-, no evidence for the corresponding anti-particle was found. In some models it is expected that the Θ(1540) and the Λ(1520) have similar production mechanisms. The photoproduction cross-sections for the Λ(1520) in the decay channel Λ(1520)→pK- and the corresponding anti-particle are determined. The partial photoproduction cross-sections for Λ(1520) and ¯(1520) are obtained as σΛ(1520) = 65.3±8.8(stat)±6.9(syst)nb and σ¯(1520) = 9.8±2.6(stat)±0.9(syst)nb, corresponding to a ratio RΛ(1520) = σ¯(1520)/σΛ(1520) = 0.15±0.05(stat)±0.02(syst).
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页码：653 / 655
页数：2
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