Strangeness suppression of qq¯ creation observed in exclusive reactions

Mestayer, M. D. et al. (2014) Strangeness suppression of qq¯ creation observed in exclusive reactions. Physical Review Letters, 113(15), p. 152004. (doi: 10.1103/PhysRevLett.113.152004)

Abstract

We measured the ratios of electroproduction cross sections from a proton target for three exclusive meson-baryon final states: ΛK+, pπ0, and nπ+, with the CLAS detector at Jefferson Lab. Using a simple model of quark hadronization, we extract qq¯ creation probabilities for the first time in exclusive two-body production, in which only a single qq¯ pair is created. We observe a sizable suppression of strange quark-antiquark pairs compared to nonstrange pairs, similar to that seen in high-energy production.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sokhan, Dr Daria and Protopopescu, Dr Dan and MacGregor, Professor Douglas and McKinnon, Dr Bryan and Livingston, Dr Kenneth and Ireland, Professor David and Rosner, Professor Guenther
• Authors: Mestayer, M. D., Park, K., Adhikari, K. P., Aghasyan, M., Pereira, S. A., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Colaneri, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., Deur, A., Djalali, C., Doughty, D., Dupre, R., Alaoui, A. E., Fassi, L. E., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fleming, J. A., Forest, T. A., Garillon, B., Garçon, M., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guegan, B., Guidal, M., Hakobyan, H., Hanretty, C., Hattawy, M., Holtrop, M., Hughes, S. M., Hyde, C. E., Ilieva, Y., Ireland, D.G., Jiang, H., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Kim, A., Kim, W., Koirala, S., Kubarovsky, V., Kuleshov, S. V., Lenisa, P., Levine, W. I., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Mayer, M., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Moody, C. I., Moutarde, H., Movsisyan, A., Camacho, C. M., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Pappalardo, L. L., Paremuzyan, R., Peng, P., Phelps, W., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Protopopescu, D., Puckett, A. J. R., Raue, B. A., Rimal, D., Ripani, M., Rizzo, A., Rosner, G., Roy, P., Sabatié, F., Saini, M. S., Schott, D., Schumacher, R. A., Simonyan, A., Sokhan, D., Strauch, S., Sytnik, V., Tang, W., Tian, Y., Ungaro, M., Vernarsky, B., Vlassov, A. V., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., Zhao, Z. W., and Zonta, I.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review Letters
• Publisher: American Physical Society
• ISSN: 0031-9007
• ISSN (Online): 1079-7114