Observation of the Cabibbo-suppressed decay Xi(+)(c) -> pK(-)pi(+)

Jun, SY; Akchurin, N; Andreev, VA; Atamantchouk, AG; Aykac, M; Balatz, MY; Bondar, NF; Bravar, A; Cooper, PS; Dauwe, LJ; Davidenko, GV; Dersch, U; Dolgolenko, AG; Dreossi, D; Dzyubenko, GB; Edelstein, R; Emediato, L; Endler, AMF; Engelfried, J; Eschrich, I; Escobar, CO; Evdokimov, AV; Filimonov, IS; Garcia, FG; Gaspero, M; Gerzon, S; Giller, I; Golovtsov, VL; Goncharenko, YM; Gottschalk, E; Gouffon, P; Grachov, OA; Gulmez, E; Iori, M; Kamenski, AD; Kangling, H; Kaya, M; Kilmer, J; Kim, VT; Kochenda, LM; Konigsmann, K; Konorov, I; Kozhevnikov, AA; 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; Luksys, M; Lungov, T; Magarrel, D; Maleev, VP; Mao, D; Masciocchi, S; Mathew, P; Mattson, M; Matveev, V; McCliment, E; McKenna, SL; Moinester, MA; Molchanov, VV; Morelos, A; Mukhin, VA; Nelson, KD; Nemitkin, AV; Neoustroev, PV; Newsom, C; Nilov, AP; Nurushev, SB; Ocherashvili, A; Oleynik, G; Onel, Y; Ozel, E; Ozkorucuklu, Suat; Patrichev, S; Penzo, A; Petrenko, SI; Pogodin, P; Povh, B; Procario, M; Prutskoi, VA; Ramberg, E; Rappazzo, GF; Razmyslovich, BV; Rud, VI; Russ, J; Schiavon, P; Semyatchkin, VK; Simon, J; Sitnikov, AI; Skow, D; 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; Wenheng, Z; You, J; Yunshan, L; Zhenlin, M; Zhigang, L; Funchal, RZ

doi:10.1103/physrevlett.84.1857

Observation of the Cabibbo-suppressed decay Xi(+)(c) -> pK(-)pi(+)

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Jun S., Akchurin N., Andreev V., Atamantchouk A., Aykac M., Balatz M., ...More

PHYSICAL REVIEW LETTERS, vol.84, no.9, pp.1857-1861, 2000 (SCI-Expanded)

Publication Type: Article / Article
Volume: 84 Issue: 9
Publication Date: 2000
Doi Number: 10.1103/physrevlett.84.1857
Journal Name: PHYSICAL REVIEW LETTERS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Page Numbers: pp.1857-1861
Istanbul University Affiliated: No

Abstract

We report the first observation of the Cabibbo-suppressed charm baryon decay Xi(c)(+) --> pK(-)pi(+) We observe 150 +/- 22 +/- 5 events for the signal. 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 fractions of the decay relative to the Cabibbo-favored Xi(c)(+) --> Sigma(+)K(-)pi(+) and Xi(c)(+) --> Xi(-)pi(+)pi(+) are measured to be B(Xi(c)(+) --> pK(-)pi(+))/B(Xi(c)(+) --> Sigma(+)K(-)pi(+)) = 0.22 +/- 0.06 +/- 0.03 and B(Xi(c)(+) --> pK(-)pi(+))/B(Xi(c)(+) --> Xi(-)pi(+)pi(+)) = 0.20 +/- 0.04 +/- 0.02, respectively.