Branching ratio of the electromagnetic decay of the Σ+(1385)

Keller, D. et al. (2012) Branching ratio of the electromagnetic decay of the Σ+(1385). Physical Review D, 85(5), Art. 052004. (doi:10.1103/PhysRevD.85.052004)

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Abstract

The CLAS detector was used to obtain the first ever measurement of the electromagnetic decay of the Σ*+(1385) from the reaction γp→K0Σ*+(1385). A real photon beam with a maximum energy of 3.8 GeV was incident on a liquid-hydrogen target, resulting in the photoproduction of the kaon and Σ∗ hyperon. Kinematic fitting was used to separate the reaction channel from the background processes. The fitting algorithm exploited a new method to kinematically fit neutrons in the CLAS detector, leading to the measured decay widths ratio Σ+(1385)→Σ+γ/Σ+(1385)→Σ+π0=11.95±2.21(stat)+0.53−1.21(sys)% and a deduced partial width of 250.0±56.9(stat)+34.3−41.2(sys)  keV. A U-spin symmetry test using the SU(3) flavor-multiplet representation yields predictions for the Σ*+(1385)→Σ+γ and Σ*0(1385)→Λγ partial widths that agree with the experimental measurements.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sokhan, Dr Daria and McKinnon, Dr Bryan and Ireland, Professor David and MacGregor, Professor I and Rosner, Professor Guenther and Protopopescu, Dr Dan
Authors: Keller, D., Hicks, K., Adhikari, K. P., Adikaram, D., Amaryan, M. J., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Bookwalter, C., Boiarinov, S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Cole, P. L., Contalbrigo, M., Crede, V., D’Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Djalali, C., Doughty, D., Dupre, R., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Gohn, W., Golovatch, E., Gothe, R. W., Graham, L., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hafidi, K., Hakobyan, H., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jo, H. S., Joo, K., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, F. J., Kubarovsky, A., Kubarovsky, V., Kuleshov, S. V., Lu, H. Y., MacGregor, I.G.D., Mao, Y., Markov, N., Mayer, M., McKinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Anefalos Pereira, S., Pisano, S., Pogorelko, O., Pozdniakov, S., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tkachenko, S., Vernarsky, B., Vineyard, M. F., Vlassov, A. V., Voskanyan, H., Voutier, E., Watts, D. P., Wood, M. H., Zachariou, N., Zana, L., Zhao, B., and Zhao, Z. W.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Journal Abbr.:Phys. Rev. D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1741-3133
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