Measurement of the differential cross section for the reaction γn→π-p from deuterium

W. Chen, T. Mibe, D. Dutta, H. Gao, J. M. Laget, M. Mirazita, P. Rossi, S. Stepanyan, I. I. Strakovsky, M. J. Amaryan, M. Anghinolfi, H. Bagdasaryan, M. Battaglieri, M. Bellis, B. L. Berman, A. S. Biselli, C. Bookwalter, D. Branford, W. J. Briscoe, W. K. BrooksV. D. Burkert, S. L. Careccia, D. S. Carman, L. Casey, P. L. Cole, P. Collins, V. Crede, A. Daniel, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, S. Dhamija, R. Dickson, C. Djalali, G. E. Dodge, D. Doughty, H. Egiyan, P. Eugenio, G. Fedotov, A. Fradi, M. Garçon, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, W. Gohn, R. W. Gothe, K. A. Griffioen, M. Guidal, H. Hakobyan, C. Hanretty, N. Hassall, D. Heddle, K. Hicks, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, H. S. Jo, J. R. Johnstone, K. Joo, D. Keller, M. Khandaker, P. Khetarpal, W. Kim, A. Klein, F. J. Klein, L. H. Kramer, V. Kubarovsky, S. E. Kuhn, S. V. Kuleshov, V. Kuznetsov, K. Livingston, H. Y. Lu, N. Markov, M. E. McCracken, B. McKinnon, C. A. Meyer, T. T. Mineeva, V. Mokeev, B. Moreno, K. Moriya, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, I. Niculescu, M. R. Niroula, M. Osipenko, A. I. Ostrovidov, K. Park, S. Park, S. Anefalos Pereira, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, Barry Ritchie, G. Rosner, F. Sabatié, M. S. Saini, J. Salamanca, C. Salgado, R. A. Schumacher, Y. G. Sharabian, D. I. Sober, D. Sokhan, S. S. Stepanyan, S. Strauch, M. Taiuti, D. J. Tedeschi, S. Tkachenko, M. Ungaro, M. F. Vineyard, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. H. Wood, A. Yegneswaran, J. Zhang, B. Zhao

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Abstract

We report a measurement of the differential cross section for the γn→π-p process from the CLAS detector at Jefferson Laboratory in Hall B for photon energies between 1.0 and 3.5GeV and pion center-of-mass (c.m.) angles (θc.m.) between 50°and 115°. We confirm a previous indication of a broad enhancement around a c.m. energy (s) of 2.1GeV at θc.m.=90°in the scaled differential cross section s7dσdt and a rapid falloff in a center-of-mass energy region of about 400MeV following the enhancement. Our data show an angular dependence of this enhancement as the suggested scaling region is approached for θc.m. from 70°to 105°.

Original languageEnglish (US)
Article number012301
JournalPhysical Review Letters
Volume103
Issue number1
DOIs
StatePublished - Aug 6 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Chen, W., Mibe, T., Dutta, D., Gao, H., Laget, J. M., Mirazita, M., Rossi, P., Stepanyan, S., Strakovsky, I. I., Amaryan, M. J., Anghinolfi, M., Bagdasaryan, H., Battaglieri, M., Bellis, M., Berman, B. L., Biselli, A. S., Bookwalter, C., Branford, D., Briscoe, W. J., ... Zhao, B. (2009). Measurement of the differential cross section for the reaction γn→π-p from deuterium. Physical Review Letters, 103(1), [012301]. https://doi.org/10.1103/PhysRevLett.103.012301