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

Tarih
2008
Yazar
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.
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Özet
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.
Bağlantı
http://hdl.handle.net/20.500.12627/106481
https://doi.org/10.1016/j.physletb.2008.07.072
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