Measurement of the σ- charge radius by σ--electron elastic scattering

• Autor(a) principal: Eschrich, I.
• Data de Publicação: 2001
• Outros Autores: Krüger, H., Simon, J., Vorwalter, K., Alkhazov, G., Atamantchouk, A. G., Balatz, M. Y., Bondar, N. F., Cooper, P. S., Dauwe, L. J., Davidenko, G. V., Dersch, U., Dirkes, G., Dolgolenko, A. G., Dzyubenko, G. B., Edelstein, R., Emediato, L., Endler, A. M.F., Engelfried, J., Escobar, C. O., Evdokimov, A. V., Filimonov, I. S., Garcia, F. G., Gaspero, M., Giller, I., Golovtsov, V. L., Gouffon, P., Gülmez, E., Kangling, H., Iori, M., Jun, S. Y., Kaya, M., Kilmer, J., Kim, V. T., Kochenda, L. M., Königsmann, K., Konorov, I., Kozhevnikov, A. P., Krivshich, A. G., Kubantsev, M. A., Kubarovsky, V. P., Kulyavtsev, A. I., Kuropatkin, N. P., Kurshetsov, V. F., Kushnirenko, A., Kwan, S., Lach, J., Lamberto, A., Landsberg, L. G., Larin, I., Leikin, E. M., Li, Y., Luksys, M., Lungov, T. [UNESP], Maleev, V. P., Mao, D., Chensheng, M., Zhenlin, M., Masciocchi, S., Mathew, P., Mattson, M., Matveev, V., McCliment, E., Moinester, M. A., Molchanov, V. V., Morelos, A., Nelson, K. D., Nemitkin, A. V., Neoustroev, P. V., Newsom, C., Nilov, A. P., Nurushev, S. B., Ocherashvili, A., Onel, Y., Ozel, E., Ozkorucuklu, S., Penzo, A., Petrenko, S. V., Pogodin, P., Povh, B., Procario, M., Prutskoi, V. A., Ramberg, E., Rappazzo, G. F., Razmyslovich, B. V., Rud, V. I., Russ, J., Scheglov, Y., Schiavon, P., Sitnikov, A. I., Skow, D., Smith, V. J., Srivastava, M., Steiner, V., Stepanov, V., Stutte, L., Svoiski, M., Terentyev, N. K., Thomas, G. P., Uvarov, L. N., Vasiliev, A. N., Vavilov, D. V., Verebryusov, V. S., Victorov, V. A., Vishnyakov, V. E., Vorobyov, A. A., You, J., Wenheng, Z., Shuchen, Z., Zukanovich-Funchal, R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/S0370-2693(01)01285-0; http://hdl.handle.net/11449/224228
• topic: Elastic scattering; Electromagnetic form factors; Hadron strong and electromagnetic radii; Hadron-induced elastic scattering at high energy; Hyperons

The σ- mean squared charge radius has been measured in the space-like Q2 range 0.035-0.105 GeV2/c2 by elastic scattering of a σ- beam off atomic electrons. The measurement was performed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c. We obtain (rch2σ- = (0.61 ± 0.12(stat.) ± 0.09(syst.)) fm2. The proton and π- charge radii were measured as well and are consistent with results of other experiments. Our result agrees with the recently measured strong interaction radius of the σ-. © 2001 Elsevier Science B.V. All rights reserved.