Artículos de revistas
First observation of the Cabibbo-suppressed decays Xi(+)(c)->Sigma(+)pi(-)pi(+) and Xi(+)(c)->Sigma(-)pi(+)pi(+) and measurement of their branching ratios
Fecha
2008Registro en:
PHYSICS LETTERS B, v.666, n.4, p.299-304, 2008
0370-2693
10.1016/j.physletb.2008.07.072
Autor
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
Institución
Resumen
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.