Search for Σ50,N50, and Θ++ pentaquark states

Y. Qiang, J. Annand, J. Arrington, Ya I. Azimov, W. Bertozzi, G. Cates, J. P. Chen, Seonho Choi, E. Chudakov, F. Cusanno, C. W.De Jager, M. Epstein, R. J. Feuerbach, F. Garibaldi, O. Gayou, R. Gilman, J. Gomez, D. J. Hamilton, J. O. Hansen, D. W. HiginbothamT. Holmstrom, M. Iodice, X. Jiang, M. Jones, J. Lerose, R. Lindgren, N. Liyanage, D. J. Margaziotis, P. Markowitz, V. Mamyan, R. Michaels, Z. E. Meziani, P. Monaghan, C. Muñoz-Camacho, V. Nelyubin, K. Paschke, E. Piasetzky, I. Rachek, P. E. Reimer, J. Reinhold, B. Reitz, R. Roche, A. Saha, A. J. Sarty, E. Schulte, A. Shahinyan, R. Sheyor, J. Singh, I. I. Strakovsky, R. Subedi, R. Suleiman, V. Sulkovsky, B. Wojtsekhowski, X. Zheng

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


A high-resolution (σinstr.=1.5 MeV) search for narrow states (Γ<10 MeV) with masses of Mx 1500-1850 MeV in ep→e′K+X, e′K-X, and e′π+X electroproduction at small angles and low Q2 was performed. These states would be candidate partner states of the reported Θ+(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.8% and 4.9% of the Λ(1520) production cross section, depending on the channel and the assumed mass and width of the state.

Original languageEnglish (US)
Article number055208
JournalPhysical Review C - Nuclear Physics
Issue number5
StatePublished - May 25 2007

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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