Observation of the Cabibbo-Suppressed Decay Ξc+→pK−π+
Year: 2000
Type: article
Abstract: We report the first observation of the Cabibbo-suppressed charm baryon decay ${\ensuremath{\Xi}}_{c}^{+}\ensuremath{\rightarrow}{\mathrm{pK}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$. We observe $150\ifmmode\pm\else\textpm\fi{}22\ifmmode\pm\else\textpm\fi{}5$ events for the signal. The data were accumulated using the SELEX spectrometer during the 1996--1997 fixed target run at Fermilab, chiefly from a $600\mathrm{GeV}/c$ ${\ensuremath{\Sigma}}^{\ensuremath{-}}$ beam. The branching fractions of the decay relative to the Cabibbo-favored ${\ensuremath{\Xi}}_{c}^{+}\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ and ${\ensuremath{\Xi}}_{c}^{+}\ensuremath{\rightarrow}{\ensuremath{\Xi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+}$ are measured to be $B({\ensuremath{\Xi}}_{c}^{+}\ensuremath{\rightarrow}{\mathrm{pK}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+})/B({\ensuremath{\Xi}}_{c}^{+}\ensuremath{\rightarrow}{\ensuremath{\Sigma}}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.22\ifmmode\pm\else\textpm\fi{}0.06\ifmmode\pm\else\textpm\fi{}0.03$ and $B({\ensuremath{\Xi}}_{c}^{+}\ensuremath{\rightarrow}{\mathrm{pK}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+})/B({\ensuremath{\Xi}}_{c}^{+}\ensuremath{\rightarrow}{\ensuremath{\Xi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+})\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.20\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.02$, respectively.
Source: Physical Review Letters
Authors: S. Y. Jun, N. Akchurin, V. A. Andreev, A. G. Atamantchouk, M. Aykac, M. Y. Balatz, N. F. Bondar, A. Bravar, P. S. Cooper, L. J. Dauwe, G. V. Davidenko, U. Dersch, A. G. Dolgolenko, D. Dreossi, G. B. Dzyubenko, R. Edelstein, L. Emediato, A. M. F. Endler, J. Engelfried, I. Eschrich, C. O. Escobar, A. V. Evdokimov, I. S. Filimonov, F. G. Garcia, M. Gaspero, S. Gerzon, I. Giller, V. L. Golovtsov, Y. M. Goncharenko, E. Gottschalk, P. Gouffon, O. A. Grachov, E. Gülmez, M. Iori, A. D. Kamenski, H. Kangling, M. Kaya, J. Kilmer, V. T. Kim, L. M. Kochenda, K. Königsmann, I. Konorov, A. A. Kozhevnikov, A. G. Krivshich, H. Krüger, M. A. Kubantsev, V. P. Kubarovsky, A. I. Kulyavtsev, N. P. Kuropatkin, V. F. Kurshetsov, A. Kushnirenko, S. Kwan, J. Lach, A. Lamberto, L. G. Landsberg, I. Larin, E. M. Leikin, M. Luksys, T. Lungov, D. Magarrel, V. P. Maleev, D. Mao, S. Masciocchi, P. Mathew, M. Mattson, V. Matveev, E. McCliment, S. L. McKenna, M. A. Moinester, V. V. Molchanov, A. Morelos, V. A. Mukhin, K. D. Nelson, A. V. Nemitkin, P. V. Neoustroev, C. Newsom, A. P. Nilov, S. B. Nurushev, A. Ocherashvili, G. Oleynik, Y. Onel, E. Ozel, S. Ozkorucuklu, S. Patrichev, A. Penzo, S. I. Petrenko, P. Pogodin, B. Povh, M. Procario, V. A. Prutskoi, E. Ramberg, G. F. Rappazzo, B. V. Razmyslovich, V. I. Rud, J. Russ, P. Schiavon, V. K. Semyatchkin, J. Simon, A. I. Sitnikov, D. Skow, V. J. Smith, M. Srivastava, V. Steiner, V. Stepanov, L. Stutte, M. Svoiski, N. K. Terentyev, G. P. Thomas, L. N. Uvarov, A. N. Vasiliev, D. V. Vavilov, V. S. Verebryusov, V. A. Victorov, V. E. Vishnyakov, A. A. Vorobyov, K. Vorwalter, Z. Wenheng, J. You, L. Yunshan, M. Zhenlin, L. Zhigang, R. Zukanovich Funchal
Institutions: Carnegie Mellon University, University of Iowa, Petersburg Nuclear Physics Institute, Institute for Theoretical and Experimental Physics, University of Trieste, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Fermi National Accelerator Laboratory, University of Michigan–Flint, Max Planck Society, Max Planck Institute for Nuclear Physics, Universidade de São Paulo, Centro Brasileiro de Pesquisas Físicas, Autonomous University of San Luis Potosí, Lomonosov Moscow State University, Istituto Nazionale di Fisica Nucleare, Sezione di Roma I, Sapienza University of Rome, Tel Aviv University, Institute for High Energy Physics, Boğaziçi University, Institute of High Energy Physics, Ball State University, University of Bristol
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2594438947