Search for the Theta(1540)+ pentaquark using kaon secondary interactions at Belle

Details Search for the Theta(1540)+ pentaquark using kaon secondary interactions at Belle Search for the Theta(1540)+ pentaquark using kaon secondary interactions at Belle

2005-07-04

arxiv.org/abs/hep-ex/0507014v3

Phys.Lett.B632:173-180,2006

Physics

High Energy Physics

High Energy Physics - Experiment

13 pages, 4 figures, contributed to the XXII International Symposium on Lepton-Photon Interactions at High Energy (LP2005), Ju

Scientific paper

10.1016/j.physletb.2005.10.077

Using kaon secondary interactions in the material of the Belle detector, we search for both inclusive and exclusive production of the Theta(1540)+. We set an upper limit of 2.5% at the 90% C.L. on the ratio of the Theta(1540)+ to Lambda(1520) inclusive production cross sections. We also search for the Theta(1540)+ as an intermediate resonance in the charge exchange reaction K+ n -> p Ks. An upper limit of Gamma(Theta+)<0.64MeV at the 90% C.L. at m(Theta+)=1.539MeV is set. These results are obtained from a 397/fb data sample collected with the Belle detector near the Upsilon(4S) resonance, at the KEKB asymmetric energy e+e- collider.

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