Upper limit on the decay Sigma(1385)(-) -> Sigma(-)gamma and cross section for gamma Sigma(-) -> Lambda pi(-)

Author:

Molchanov, VV  Alkhazov, G  Atamantchouk, AG  Balatz, MY  Bondar, NF  Casey, D  Cooper, PS  Dauwe, LJ  Davidenko, GV  Dersch, U  Dolgolenko, AG  Dzyubenko, GB  Edelstein, R  Emediato, L  Endler, AMF  Engelfried, J  Eschrich, I  Escobar, CO  Evdokimov, AV  Ferbel, T  Filimonov, IS  Garcia, FG  Gaspero, M  Giller, I  Golovtsov, VL  Gouffon, P  Gulmez, E  Hammer, C  Kangling, H  Iori, M  Jun, SY  Kaya, M  Kilmer, J  Kim, VT  Kochenda, LM  Konorov, I  Kozhevnikov, AP  Krivshich, AG  Kruger, H  Kubantsev, MA  Kubarovsky, VP  Kulyavtsev, AI  Kuropatkin, NP  Kurshetsov, VF  Kushnirenko, A  Kwan, S  Lach, J  Lamberto, A  Landsberg, LG  Larin, I  Leikin, EM  Yunshan, L  Luksys, M  Lungov, T  Maleev, VP  Mao, D  Chensheng, M  Zhenlin, M  Mathew, P  Mattson, M  Matveev, V  McCliment, E  Moinester, MA  Morelos, A  Mukhin, VA  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  Procario, M  Prutskoi, VA  Ramberg, E  Rappazzo, GF  Razmyslovich, BV  Rud, VI  Russ, J  Schiavon, P  Simon, J  Sitnikov, AI  Skow, D  Slattery, P  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  Vorwalter, K  You, J  Zhao, WH  Zheng, SC  Zhu, ZH  Zielinski, M  Zukanovich-Funchal, R  

Journal:

PHYSICS LETTERS B

Issue Date:

2004

Abstract(summary):

Coherent Lambdapi(-) production on Pb of 600 GeV Sigma(-) hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on the radiative decay width Gamma[Sigma(1385)(-) --> Sigma(-) gamma] < 9.5 keV, and estimate the cross section for gamma Sigma(-) --> Lambdapi(-) at roots approximate to 1.385 GeV to be 56 +/- 16 mub. Crown Copyright (C) 2004 Published by Elsevier B.V. All rights reserved.

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