Electromagnetic decay of the Sigma(0)(1385) to Lambda gamma

D. Keller, K. Hicks, K. P. Adhikari, K. P. Adhikari, D. Adikaram, M. Aghasyan, M. Amarian, H. Baghdasaryan, J. Ball, M. Battaglieri, V. Batourine, I. Bedlinskiy, R. P. Bennett, A. S. Biselli, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, S. L. Careccia, D. S. CarmanL. Casey, P. L. Cole, M. Contalbrigo, V. Crede, 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, H. Egiyan, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, S. Fegan, T. A. Forest, M. Y. Gabrielyan, G. Gavalian, N. Gevorgyan, K. L. Giovanetti, F. X. Girod, W. Gohn, E. Golovatch, D. P. Watts, CLAS Collaboration

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The electromagnetic decay Sigma(0)(1385) -> Lambda gamma was studied using the CLAS detector at the Thomas Jefferson National Accelerator Facility. A real photon beam with a maximum energy of 3.8 GeV was incident on a proton target, producing an exclusive final state of K+Sigma*(0). We report the decay widths ratio Sigma(0)(1385) -> Lambda gamma/Sigma(0)(1385) -> Lambda pi(0) = 1.42 +/- 0.12(stat)(-0.07)(+0.11)(sys)%. This ratio is larger than most theoretical predictions by factors ranging from 1.5-3, but is consistent with the only other experimental measurement. From the reported ratio we calculate the partial width and electromagnetic transition magnetic moment for Sigma(0)(1385) -> Lambda gamma.

Original languageEnglish
Article number072004
Pages (from-to)-
Number of pages14
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number7
Publication statusPublished - 21 Apr 2011

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