Measurement of the Σ charge radius by  electron Σ elastic scattering

I. Eschrich*, H. Krüger, J. Simon, K. Vorwalter, G. Alkhazov, A. G. Atamantchouk, M. Y. Balatz, N. F. Bondar, P. S. Cooper, L. J. Dauwe, G. V. Davidenko, U. Dersch, G. Dirkes, A. G. Dolgolenko, G. B. Dzyubenko, R. Edelstein, L. Emediato, A. M.F. Endler, J. Engelfried, C. O. EscobarA. V. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, I. Giller, V. L. Golovtsov, P. Gouffon, E. Gülmez, H. Kangling, M. Iori, S. Y. Jun, M. Kaya, J. Kilmer, V. T. Kim, L. M. Kochenda, K. Königsmann, I. Konorov, A. P. Kozhevnikov, A. G. Krivshich, M. A. Kubantsev, V. P. Kubarovsky, A. I. Kulyavtsev, N. P. Kuropatkin, V. F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L. G. Landsberg, I. Larin, E. M. Leikin, Y. Li, M. Luksys, T. Lungov, V. P. Maleev, D. Mao, M. Chensheng, M. Zhenlin, S. Masciocchi, P. Mathew, M. Mattson, V. Matveev, E. McCliment, M. A. Moinester, V. V. Molchanov, A. Morelos, K. D. Nelson, A. V. Nemitkin, P. V. Neoustroev, C. Newsom, A. P. Nilov, S. B. Nurushev, A. Ocherashvili, Y. Onel, E. Ozel, S. Ozkorucuklu, A. Penzo, S. V. Petrenko, P. Pogodin, B. Povh, M. Procario, V. A. Prutskoi, E. Ramberg, G. F. Rappazzo, B. V. Razmyslovich, V. I. Rud, J. Russ, Y. Scheglov, P. Schiavon, A. I. Sitnikov, D. Skow, V. J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N. K. Terentyev, G. P. Thomas, L. N. Uvarov, A. N. Vasiliev, D. V. Vavilov, V. S. Verebryusov, V. A. Victorov, V. E. Vishnyakov, A. A. Vorobyov, J. You, Z. Wenheng, Z. Shuchen, R. Zukanovich-Funchal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

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-.

Original languageEnglish
Pages (from-to)233-239
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume522
Issue number3-4
DOIs
StatePublished - 13 Dec 2001

Funding

FundersFunder number
Consejo Nacional de Ciencia y Tecnologı́a
Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico
Fondo de Apoyo a la Investigación
International Science Foundation
Russian Academy of Science
Russian Ministry of Science and Technology
Turkish Scientific and Technological Research Board
US Department of Energy
US–Israel Binational Science Foundation
National Science Foundation
U.S. Department of EnergyDE-FG02-91ER40664
U.S. Department of Energy
Directorate for Mathematical and Physical Sciences9602178
Directorate for Mathematical and Physical Sciences
North Atlantic Treaty OrganizationCR6.941058-1360/94
North Atlantic Treaty Organization
British Skin Foundation
Fundação de Amparo à Pesquisa do Estado de São Paulo
Israel Academy of Sciences and Humanities
Israel Science Foundation
Universidad Autónoma de San Luis Potosí
Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie
Istituto Nazionale di Fisica Nucleare

    Keywords

    • Elastic scattering
    • Electromagnetic form factors
    • Hadron strong and electromagnetic radii
    • Hadron-induced elastic scattering at high energy
    • Hyperons

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