First observation of the Cabibbo-suppressed decays Xi(+)(c)->Sigma(+)pi(-)pi(+) and Xi(+)(c)->Sigma(-)pi(+)pi(+) and measurement of their branching ratios
- Kangling, He
- 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, Zhao Wenheng
- Zheng Shuchen, Zheng Shuchen
- Zukanovich-Funchal, R.
- Ozkorucuklu, Suat
- 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, C. O.
- Estrada, N.
- Evdokimov, A. V.
- Filimonov, I. S.
- Garcia, F. G.
- Gaspero, M.
- Giller, I.
- Golovtsov, V. L.
- Gouffon, P.
- Guelmez, E.
- 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 Chensheng
- Mao Zhenlin, 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.
- Penzo, A.
- Petrenko, S. V.
- Pogodin, P.
- Procario, M.
- Prutskoi, V. A.
DOIAbstract
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 m...
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