Strangeness suppression of q q ¯ creation observed in exclusive reactions

M. D. Mestayer, K. Park, K. P. Adhikari, M. Aghasyan, S. Anefalos Pereira, J. Ball, M. Battaglieri, V. Batourine, I. Bedlinskiy, A. S. Biselli, S. Boiarinov, W. J. Briscoe, W. K. Brooks, V. D. Burkert, D. S. Carman, A. Celentano, S. Chandavar, G. Charles, L. Colaneri, P. L. ColeM. Contalbrigo, O. Cortes, V. Crede, A. D'Angelo, N. Dashyan, R. De Vita, A. Deur, C. Djalali, D. Doughty, R. Dupre, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, J. A. Fleming, T. A. Forest, B. Garillon, M. Garçon, Y. Ghandilyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, E. Golovatch, R. W. Gothe, K. A. Griffioen, B. Guegan, M. Guidal, H. Hakobyan, C. Hanretty, M. Hattawy, M. Holtrop, S. M. Hughes, C. E. Hyde, Y. Ilieva, D. G. Ireland, H. Jiang, H. S. Jo, K. Joo, D. Keller, M. Khandaker, A. Kim, W. Kim, S. Koirala, V. Kubarovsky, S. V. Kuleshov, P. Lenisa, W. I. Levine, K. Livingston, H. Y. Lu, I. J.D. MacGregor, M. Mayer, B. McKinnon, C. A. Meyer, M. Mirazita, V. Mokeev, R. A. Montgomery, C. I. Moody, H. Moutarde, A. Movsisyan, C. Munoz Camacho, P. Nadel-Turonski, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, L. L. Pappalardo, R. Paremuzyan, P. Peng, W. Phelps, S. Pisano, O. Pogorelko, S. Pozdniakov, J. W. Price, D. Protopopescu, A. J.R. Puckett, B. A. Raue, D. Rimal, M. Ripani, A. Rizzo, G. Rosner, P. Roy, F. Sabatié, M. S. Saini, D. Schott, R. A. Schumacher, A. Simonyan, D. Sokhan, S. Strauch, V. Sytnik, W. Tang, Ye Tian, M. Ungaro, B. Vernarsky, A. V. Vlassov, H. Voskanyan, E. Voutier, N. K. Walford, D. P. Watts, X. Wei, L. B. Weinstein, M. H. Wood, N. Zachariou, J. Zhang, Z. W. Zhao, I. Zonta

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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.

Original languageEnglish (US)
Article number152004
JournalPhysical Review Letters
Volume113
Issue number15
DOIs
StatePublished - Oct 10 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    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., ... Zonta, I. (2014). Strangeness suppression of q q ¯ creation observed in exclusive reactions. Physical Review Letters, 113(15), [152004]. https://doi.org/10.1103/PhysRevLett.113.152004