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First observation of the Cabibbo-suppressed decays Xi(+)(c)->Sigma(+)pi(-)pi(+) and Xi(+)(c)->Sigma(-)pi(+)pi(+) and measurement of their branching ratios

**Autoria(s):** VAZQUEZ-JAUREGUI, E.; ENGELFRIED, J.; AKGUN, U.; ALKHAZOV, G.; AMARO-REYES, J.; ATAMANTCHOUK, A. G.; AYAN, A. S.; BALATZ, M. Y.; BLANCO-COVARRUBIAS, A.; BONDAR, N. F.; COOPER, P. S.; DAUWE, L. J.; DAVIDENKO, G. V.; DERSCH, U.; DOLGOLENKO, A. G.; DZYUBENKO, G. B.; EDELSTEIN, R.; EMEDIATO, L.; ENDLER, A. M. F.; ESCHRICH, I.; Escobar, Carlos Ourivio; ESTRADA, N.; EVDOKIMOV, A. V.; FILIMONOV, I. S.; GARCIA, F G; GASPERO, M.; GILLER, I.; GOLOVTSOV, V. L.; Gouffon, Philippe; GUELMEZ, E.; KANGLING, He; IORI, M.; JUN, S. Y.; KAYA, M.; KILMER, J.; KIM, V. T.; KOCHENDA, L. M.; KONOROV, I.; KOZHEVNIKOV, A. P.; KRIVSHICH, A. G.; KRUEGER, H.; KUBANTSEV, M. A.; KUBAROVSKY, V. P.; KULYAVTSEV, A. I.; KUROPATKIN, N. P.; KURSHETSOV, V. F.; KUSHNIRENKO, A.; KWAN, S.; LACHE, J.; LAMBERTO, A.; LANDSBERG, L. G.; LARIN, I.; LEIKIN, E. M.; YUNSHAN, Li; LOPEZ-HINOJOSA, G.; LUKSYS, M.; LUNGOV, T.; MALEEV, V. P.; MAO, D.; Mao Chensheng; Mao Zhenlin; 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.; PROCARIO, M.; PRUTSKOI, V. A.; RAMBERG, E.; RAPPAZZO, G. F.; RAZMYSIOVICH, B. V.; RUD, V. I.; RUSS, J.; SANCHEZ-LOPEZ, J. L.; SCHIAVON, P.; SIMON, J.; SITNIKOV, A. I.; SKOW, D.; SMITH, V. J.; SRIVASTAVA, M.; STEINER, V.; STEPANOV, V.; STUTTE, L.; SVOISKI, M.; TERENTYEV, N. K.; THOMAS, G. P.; TORRES, I.; UVAROV, L. N.; VASILIEV, A. N.; VAVILOV, D. V.; VEREBRYUSOV, V. S.; VICTOROV, V. A.; VISHNYAKOV, V. E.; VOROBYOV, A. A.; VORWALTER, K.; YOU, J.; Zhao Wenheng; Zheng Shuchen; Funchal, Renata Zukanovich; SELEX Collaboration
Contribuinte(s)	UNIVERSIDADE DE SÃO PAULO
Data(s)	20/10/2012 20/10/2012 2008
Resumo	We report the first observation of two Cabibbo-suppressed ecay modes, Xi(+)(c) -> Sigma(+)pi(-)pi(+) and Xi c+ -> Sigma(-)pi(+)pi(+). We observe 59 +/- 14 over a background of 87, and 22 +/- 8 over a background of 13 events, respectively, for the signals. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600 Gev/c Sigma(-) beam. The branching ratios of the decays relative to the Cabibbo-favored Xi c+ -> Xi(-)pi(+)pi(+) are measured to be B(Xi(+)(c) -> Sigma(+)pi(-)pi(+))/B(Xi(+)(c) -> Xi(-)pi(+)pi(+)) = 0.48 +/- 0.20, and B(Xi(+)(c) -> Sigma(-)pi(+)pi(+))/B(Xi(+)(c) -> Sigma(-)pi(+)pi(+)) = 0.18 +/- 0.09, respectively. We also report branching ratios for the same decay modes of the Delta(+)(c) relative to Delta(+)(c) -> pK(-)pi(+.) (C) 2008 Elsevier B.V. All rights reserved. Bundesministeriums für Bildung und Forschung (BMBF) Bundesministerium fur Bildung, Wissenschaft, Forschung und Technologie (BMBF) Consejo Nacional de Ciencia y Tecnologia (CONACyT) Consejo Nacional de Ciencia y Tecnología (CONACYT) - México Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CNPq Conselho Nacional de Desenvolvimento Cientifico e Tecnologico Fondo de Apoyo a la Investigacion (UASLP) Fondo de Apoyo a la Investigacion (UASLP) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Fundac ao de Amparo A Pesquisa do Estado de Sao Paulo (FAPESP) Israel Science Foundation Israel Science Foundation Istituto Nazionale di Fisica Nucleate (INFN) Istituto Nazionale di Fisica Nucleate (INFN) International Science Foundation (ISF) International Science Foundation (ISF) U.S. National Science Foundation (NSF) National Science Foundation (NSF)[9602178] NATO NATO[CR6.941058-1360/94] Russian Academy of Sciences Russian Academy of Sciences Russian Ministry of Science and Technology Russian Ministry of Science and Technology Russian Foundation for Basic Research Russian Foundation for Basic Research[05-02-17869] Secretaria de Educacion Publica (Mexico)[2003-24-001-026] Secretaria de Educacion Publica (Mexico) Turkish Scientific and Technological Research Board (TUBITAK) Turkish Scientific and Technological Research Board (TUBITAK) US Department of Energy (DOE)[DE-FG02-91ER40664] U.S. Department of Energy (DOE) U.S. Department of Energy (DOE) US Department of Energy (DOE)[DE-AC02-76CHO3000]
Identificador	PHYSICS LETTERS B, v.666, n.4, p.299-304, 2008 0370-2693 http://producao.usp.br/handle/BDPI/29153 10.1016/j.physletb.2008.07.072 http://dx.doi.org/10.1016/j.physletb.2008.07.072
Idioma(s)	eng
Publicador	ELSEVIER SCIENCE BV
Relação	Physics Letters B
Direitos	restrictedAccess Copyright ELSEVIER SCIENCE BV
Palavras-Chave	#LAMBDA-C #XI(+)(C) #MESONS #BARYON #Physics, Multidisciplinary
Tipo	article original article publishedVersion

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