Dickson, R. et al. (2016) Photoproduction of the f1 (1285) meson. Physical Review C, 93(6), 065202. (doi: 10.1103/PhysRevC.93.065202)
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Abstract
The f1(1285) meson with mass 1281.0±0.8 MeV/c2 and width 18.4±1.4 MeV (full width at half maximum) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the ηπ+π−,K+K¯¯¯0π−, and K−K0π+ decay channels from threshold up to a center-of-mass energy of 2.8 GeV. The mass, width, and an amplitude analysis of the ηπ+π− final-state Dalitz distribution are consistent with the axial-vector JP=1+ f1(1285) identity, rather than the pseudoscalar 0− η(1295). The production mechanism is more consistent with s-channel decay of a high-mass N∗ state and not with t-channel meson exchange. Decays to ηππ go dominantly via the intermediate a±0(980)π∓ states, with the branching ratio Γ[a0π(noK¯¯¯K)]/Γ[ηππ(all)]=0.74±0.09. The branching ratios Γ(KK¯¯¯π)/Γ(ηππ)=0.216±0.033 and Γ(γρ0)/Γ(ηππ)=0.047±0.018 were also obtained. The first is in agreement with previous data for the f1(1285), while the latter is lower than the world average
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Murdoch, Mr Gavin and Sokhan, Dr Daria and McKinnon, Dr Bryan and Ireland, Professor David and Livingston, Dr Kenneth and MacGregor, Professor Douglas and Rosner, Professor Guenther |
| Authors: | Dickson, R., Schumacher, R. A., Adhikari, K. P., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Badui, R. A., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A., Boiarinov, S., Briscoe, W. J., Burkert, V. D., Cao, T., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dugger, M., Dupre, R., El Alaoui, A., El Fassi, L., Eugenio, P., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J. A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gothe, R. W., Griffioen, K. A., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Holtrop, M., Hicks, K., Hughes, S. M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jiang, H., Jo, H. S., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Kuleshov, S. V., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I.J.D., Mattione, P., McKinnon, B., Meyer, C. A., Mirazita, M., Markov, N., Mokeev, V., Moriya, K., Munevar, E., Murdoch, G., Nadel-Turonski, P., Net, L. A., Ni, A., Osipenko, M., Ostrovidov, A. I., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Prok, Y., Puckett, A. J. R., Raue, B. A., Ripani, M., Rizzo, A., Rosner, G., Roy, P., Salgado, C., Seder, E., Sharabian, Y. G., Skorodumina, I., Smith, E. S., Smith, G. D., Sober, D., Sokhan, D., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Stankovic, I., Strauch, S., Sytnik, V., Taiuti, M., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Weygand, D., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., and Zonta, I. |
| Subjects: | Q Science > QC Physics |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Research Group: | Nuclear Physics |
| Journal Name: | Physical Review C |
| Publisher: | American Physical Society |
| ISSN: | 0556-2813 |
| ISSN (Online): | 1089-490X |
| Published Online: | 09 June 2016 |
| Copyright Holders: | Copyright © 2016 American Physical Society |
| First Published: | First published in Physical Review C 93(6):065202 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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