Study of coherent diffractive production reactions ofp+C→[Y 0 K +]+C type and observation of narrow structures in ∑ (1385)0 K + and ∑0 K + effective mass spectra
Golovkin, S. V. ; Kozhevnikov, A. P. ; Kubarovsky, V. P. ; Kulyavtzev, A. I. ; Kurshetsov, V. F. ; Kushnirenko, A. I. ; Landsberg, L. G. ; Molchanov, V. V. ; Mukhin, V. A. ; Solyanik, V. I. ; Vavilov, D. V. ; Victorov, V. A. ; Balatz, M. Ya. ; Dzubenko, G. V. ; Kamenskii, A. D. ; Kliger, G. K. ; Kolganov, V. Z. ; Lakaev, V. S. ; Lomkatzi, G. S. ; Nilov, A. P. ; Smolyankin, V. T. ; Vishnyakov, V. E.
Springer
Published 1995
Springer
Published 1995
| ISSN: |
1434-6052
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Physics
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| Notes: |
Abstract In the experiments at the SPHINX facility in 70 GeV proton beam of the IHEP accelerator the coherent diffractive production reactions on carbon nucleip+C→ [∑(1385)0 K ++C andp+C→[Σ0 K +]+C were investigated. The evidences for new baryon states were obtained in the study of hyperon-kaon effective mass spectra in these two reactions:X (2050) with massM=(2052±6) MeV and width Γ=(35 −35 +22 ) MeV inM[∑(1385)0 K +] andX(2000) withM=1999±6 MeV and Γ=91±17 MeV inM[Σ0 K +]. The unusual features of these massive states (small enough decay widths, anomalously large branching ratios for decays with strange particles emission) make them very serious candidates for cryptoexotic pentaquark baryons with hidden strangeness.
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| Type of Medium: |
Electronic Resource
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| URL: |