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Measurement of the Sigma(-) charge radius by Sigma(-)-electron elastic scattering

Author:
Eschrich, I  Kruger, H  Simon, J  Vorwalter, K  Alkhazov, G  Atamantchouk, AG  Balatz, MY  Bondar, NF  Cooper, PS  Dauwe, LJ  Davidenko, GV  Dersch, U  Dirkes, G  Dolgolenko, AG  Dzyubenko, GB  Edelstein, R  Emediato, L  Endler, AMF  Engelfried, J  Escobar, CO  Evdokimov, AV  Filimonov, IS  Garcia, FG  Gaspero, M  Giller, I  Golovtsov, VL  Gouffon, P  Gulmez, E  Kangling, H  Iori, M  Jun, SY  Kaya, M  Kilmer, J  Kim, VT  Kochenda, LM  Konigsmann, K  Konorov, I  Kozhevnikov, AP  Krivshich, AG  Kubantsev, MA  Kubarovsky, VP  Kulyavtsev, AI  Kuropatkin, NP  Kurshetsov, VF  Kushnirenko, A  Kwan, S  Lach, J  Lamberto, A  Landsberg, LG  Larin, I  Leikin, EM  Li, YS  Luksys, M  Lungov, T  Maleev, VP  Mao, D  Mao, CS  Mao, ZL  Masciocchi, S  Mathew, P  Mattson, M  Matveev, V  McCliment, E  Moinester, MA  Molchanov, VV  Morelos, A  Nelson, KD  Nemitkin, AV  Neoustroev, PV  Newsom, C  Nilov, AP  Nurushev, SB  Ocherashvili, A  Onel, Y  Ozel, E  Ozkorucuklu, S  Penzo, A  Petrenko, SV  Pogodin, P  Povh, B  Procario, M  Prutskoi, VA  Ramberg, E  Rappazzo, GF  Razmyslovich, BV  Rud, VI  Russ, J  Scheglov, Y  Schiavon, P  Sitnikov, AI  Skow, D  Smith, VJ  Srivastava, M  Steiner, V  Stepanov, V  Stutte, L  Svoiski, M  Terentyev, NK  Thomas, GP  Uvarov, LN  Vasiliev, AN  Vavilov, DV  Verebryusov, VS  Victorov, VA  Vishnyakov, VE  Vorobyov, AA  You, J  Zhao, WH  Zheng, SC  Zukanovich-Funchal, R  


Journal:
PHYSICS LETTERS B


Issue Date:
2001


Abstract(summary):

The Sigma (-) mean squared charge radius has been measured in the space-like Q(2) range 0.035--0.105 GeV2/c(2) by elastic scattering of a Sigma (-) beam off atomic electrons. The measurement was per-formed with the SELEX (E781) spectrometer using the Fermilab hyperon beam at a mean energy of 610 GeV/c We obtain Sigma (-) =(0.61 +/- 0.12(stat.) +/- 0.09(syst.)) fm(2). The proton and pi (-) 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 Sigma (-). (C) 2001 Elsevier Science B.V. All rights reserved.


Page:
233---239


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