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

Mizuk, R.; Danilov, M.; Abe, K.; Adachi, I.; Aihara, H.; Asano, Y.; Aushev, T.; Bahinipati, S.; Bakich, A.M.; Balagura, V.; Banerjee, S.; Barberio, E.; Barbero, M.; Bay, A.; Bedny, I.; Bitenc, U.; Bizjak, I.; Blyth, S.; Bondar, A.; Bozek, A.; Bračko, M.; Brodzicka, J.; Browder, T.E.; Chang, P.; Chao, Y.; Chen, A.; Chen, K.-F.; Chen, W.T.; Cheon, B.G.; Chistov, R.; Choi, S.-K.; Choi, Y.; Chuvikov, A.; Dalseno, J.; Dash, M.; Dong, L.Y.; Drutskoy, A.; Eidelman, S.; Enari, Y.; Fratina, S.; Gabyshev, N.; Garmash, A.; Gershon, T.; Gokhroo, G.; Golob, B.; Gorišek, A.; Haba, J.; Hara, T.; Hastings, N.C.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W.-S.; Iijima, T.; Ikado, K.; Imoto, A.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Kang, J.H.; Kang, J.S.; Kapusta, P.; Katayama, N.; Kawai, H.; Kawasaki, T.; Khan, H.R.; Kichimi, H.; Kim, H.J.; Kim, J.H.; Kim, S.K.; Kim, S.M.; Korpar, S.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kuo, C.C.; Kuzmin, A.; Kwon, Y.-J.; Lange, J.S.; Lee, S.E.; Lesiak, T.; Li, J.; Lin, S.-W.; Liventsev, D.; MacNaughton, J.; Majumder, G.; Mandl, F.; Matsumoto, T.; Matyja, A.; Mikami, Y.; Mitaroff, W.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Miyazaki, Y.; Moloney, G.R.; et al.

doi:10.1016/j.physletb.2005.10.077

research article

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

Mizuk, R.

•

Danilov, M.

•

Abe, K.

2006

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Using kaon secondary interactions in the material of the Belle detector, we search for both inclusive and exclusive production of the Θ(1540) +. We set an upper limit of 2.5% at the 90% C.L. on the ratio of the Θ(1540)+ to Λ(1520) inclusive production cross sections. We also search for the Θ(1540)+ as an intermediate resonance in the charge exchange reaction K+n→pKS 0. We set an upper limit of ΓΘ+<0.64 MeV at the 90% C.L. for m Θ+=1.539 MeV/c2. These results are obtained from a 397 fb-1 data sample collected with the Belle detector near the Υ(4S) resonance, at the KEKB asymmetric energy e+e- collider. © 2005 Elsevier B.V. All rights reserved.