1. Search for the Photoexcitation of Exotic Mesons in the pi+pi+pi- System
- Author
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Nozar, M., Salgado, C., P. Weygand, D., Guo, L., Adams, G., Li, J., Eugenio, P., J. Amaryan, M., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., P. Ball, J., Baltzell, N.A., Barrow, S., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., L. Berman, B., S. Biselli, A., Blaszczyk, L., E. Bonner, B., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., J. Briscoe, W., K. Brooks, W., Bültmann, S., D. Burkert, V., Butuceanu, C., R. Calarco, J., L. Careccia, S., S. Carman, D., Carnahan, B., Casey, L., Cazes, A., Chen, Si, Cheng, L., L. Cole, P., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Crede, V., P. Cummings, J., Dale, D., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., V. Degtyarenko, P., Denizli, H., Dennis, L., Deur, A., V. Dharmawardane, K., S. Dhuga, K., Dickson, R., Djalali, C., E. Dodge, G., Doughty, D., Dugger, M., Dytman, S., P. Dzyubak, O., Egiyan, H., S. Egiyan, K., El Fassi, L., Elouadrhiri, L., Fatemi, R., Fedotov, G., J. Feuerbach, R., Forest, T.A., Fradi, A., Funsten, H., Garçon, M., Gavalian, G., Gevorgyan, N., P. Gilfoyle, G., L. Giovanetti, K., X. Girod, F., T. Goetz, J., W. Gothe, R., A. Griffioen, K., Guidal, M., Guillo, M., Guler, N., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hanretty, C., Hardie, J., Hassall, N., Heddle, D., W. Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., E. Hyde-Wright, C., Ilieva, Y., G. Ireland, D., S. Ishkhanov, B., L. Isupov, E., M. Ito, M., Jenkins, D., S. Jo, H., R. Johnstone, J., Joo, K., G. Juengst, H., Kalantarians, N., D. Kellie, J., Khandaker, M., Kim, W., Klein, A., J. Klein, F., Kossov, M., Krahn, Z., H. Kramer, L., Kubarovsky, V., Kuhn, J., E. Kuhn, S., V. Kuleshov, S., Kuznetsov, V., Lachniet, J., M. Laget, J., Langheinrich, J., Lawrence, D., Livingston, K., Y. Lu, H., MacCormick, M., Markov, N., Mattione, P., McAleer, S., Mckinnon, B., W. C. Mcnabb, J., A. Mecking, B., Mehrabyan, S., D. Mestayer, M., Meyer, C.A., Mibe, T., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Moreno, B., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., S. Mutchler, G., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., B. Niczyporuk, B., R. Niroula, M., A. Niyazov, R., V. O'Rielly, G., Osipenko, M., I. Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Anefalos Pereira, S., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Popa, I., Pozdniakov, S., M. Preedom, B., W. Price, J., Prok, Y., Protopopescu, D., M. Qin, L., A. Raue, B., Riccardi, G., Ricco, G., Ripani, M., G. Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., D. Rubin, P., Sabatié, F., Salamanca, J., P. Santoro, J., Sapunenko, V., A. Schumacher, R., S. Serov, V., G. Sharabian, Y., Sharov, D., V. Shvedunov, N., V. Skabelin, A., S. Smith, E., C. Smith, L., I. Sober, D., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., E. Stokes, B., Stoler, P., I. Strakovsky, I., Strauch, S., Taiuti, M., J. Tedeschi, D., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Ungaro, M., F. Vineyard, M., V. Vlassov, A., P. Watts, D., B. Weinstein, L., Williams, M., Wolin, E., H. Wood, M., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., W. Zhao, Z., Collaboration), (clas, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
High Energy Physics - Experiment (hep-ex) ,FOS: Physical sciences ,Physics and Astronomy(all) ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,High Energy Physics - Experiment - Abstract
A search for exotic mesons in the $\pi^{+}\pi^{+}\pi^{-}$ system photoproduced by the charge exchange reaction $\gamma p\to \pi^{+}\pi^{+}\pi^{-}(n)$ was carried out by the CLAS collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4 GeV range, produced through bremsstrahlung from a 5.744 GeV electron beam, was incident on a liquid-hydrogen target. A Partial Wave Analysis (PWA) was performed on a sample of 83,000 events, the highest such statistics to date in this reaction at these energies. The main objective of this study was to look for the photoproduction of an exotic $J^{PC} = 1^{-+}$ resonant state in the 1 to 2 GeV mass range. Our PWA analysis, based on the isobar model, shows production of the $a_{2}(1320)$ and the $\pi_{2}(1670)$ mesons, but no evidence for the $a_{1}(1260)$, nor the $\pi_{1}(1600)$ exotic state at the expected levels. An upper limit of 13.5 nb is determined for the exotic $\pi_1(1600)$ cross section, less than 2% of the $a_2(1320)$ production., Comment: 6 pages, 5 figures, to be submitted to Phys.Rev.Lett
- Published
- 2009
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