Differential cross sections and polarization observables from CLAS K⁎ photoproduction and the search for new N⁎ states

Differential cross sections and polarization observables from CLAS K⁎ photoproduction and the search for new N⁎ states

The reaction γp→K⁎+Λ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin-density matrix elements have been extracted for this reaction. Differential cross sections, spin density mat...

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Veröffentlicht in:Physics letters. B 2017-08, Vol.771 (C), p.142-150
Hauptverfasser: Anisovich, A.V., Nikonov, V.A., Akbar, Z., Amaryan, M.J., Anefalos Pereira, S., Badui, R.A., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A.S., Briscoe, W.J., Carman, D.S., Chandavar, S., Chetry, T., Ciullo, G., Cole, P.L., Compton, N., Contalbrigo, M., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dupre, R., Egiyan, H., Eugenio, P., Fanchini, E., Filippi, A., Fleming, J.A., Gevorgyan, N., Giovanetti, K.L., Girod, F.X., Gleason, C., Gothe, R.W., Griffioen, K.A., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jenkins, D., Jiang, H., Jo, H.S., Joosten, S., Keller, D., Khachatryan, G., Kim, W., Klein, F.J., Lenisa, P., Livingston, K., MacGregor, I.J.D., Markov, N., McKinnon, B., Meyer, C.A., Mirazita, M., Mokeev, V., Montgomery, R.A., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Phelps, W., Pisano, S., Price, J.W., Prok, Y., Puckett, A.J.R., Raue, B.A., Ritchie, B.G., Rosner, G., Roy, P., Schumacher, R.A., Sharabian, Y.G., Skorodumina, Iu, Smith, G.D., Sokhan, D., Stankovic, I., Stepanyan, S., Strauch, S., Sytnik, V., Tian, Ye, Ungaro, M., Voskanyan, H., Walford, N.K., Watts, D.P., Wood, M.H., Zachariou, N., Zonta, I.
Format: Artikel
Sprache:eng
Schlagworte:
Baryon spectroscopy
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
kaon photoproduction
Meson photoproduction
Nuclear Experiment
NUCLEAR PHYSICS AND RADIATION PHYSICS
Physics
Polarization observables
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Beschreibung
Zusammenfassung:The reaction γp→K⁎+Λ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin-density matrix elements have been extracted for this reaction. Differential cross sections, spin density matrix elements, and the Λ recoil polarization are compared with theoretical predictions using the BnGa partial wave analysis. The main result is the evidence for significant contributions from N(1895)1/2− and N(2100)1/2+ to the reaction. Branching ratios for decays into K⁎Λ for these resonances and further resonances are reported.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2017.05.029