Upper limits for the photoproduction cross section for the phi(--)(1860) pentaquark state off the deuteron

CLAS Collaboration, H. Egiyan, J. Langheinrich, R. W. Gothe, L. Graham, M. Holtrop, H. Lu, P. Mattione, G. Mutchler, K. Park, E. S. Smith, S. Stepanyan, Z. W. Zhao, K. P. Adhikari, M. Aghasyan, M. Anghinolfi, H. Baghdasaryan, J. Ball, N. A. Baltzell, M. BattaglieriI. Bedlinskiy, R. P. Bennett, A. S. Biselli, C. Bookwalter, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, D. S. Carman, A. Celentano, S. Chandavar, M. Contalbrigo, A. D'Angelo, A. Daniel, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, B. Dey, R. Dickson, C. Djalali, D. Doughty, R. Dupre, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, S. Fegan, A. Fradi, M. Y. Gabrielyan, D. P. Watts

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We searched for the phi(--)(1860) pentaquark in the photoproduction process off the deuteron in the Xi(-)pi(-)-decay channel using CLAS. The invariant-mass spectrum of the Xi(-)pi(-) system does not indicate any statistically significant enhancement near the reported mass M = 1.860 GeV. The statistical analysis of the sideband-subtracted mass spectrum yields a 90%-confidence-level upper limit of 0.7 nb for the photoproduction cross section of phi(--)(1860) with a consecutive decay into Xi(-)pi(-) in the photon-energy range 4.5 GeV < E-gamma < 5.5 GeV.

Original languageEnglish
Article number015205
Pages (from-to)-
Number of pages9
JournalPhysical Review C
Issue number1
Publication statusPublished - 30 Jan 2012

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