Research SPring-8

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the spring-8 circumference ring facility.


the collaboration known reports of resonance interpret
Θ+
pentaquark candidate made of 2 quarks, 2 down quarks , strange antiquark (uudds). 2008 review of particle physics of particle data group ruled out existence of resonance, new reports leps indicate resonance seen in
γ

d
→
k+

k−

p

n
channel.








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