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11.
M. Ya. Balatz I. M. Belyaev V. A. Dorofeev G. B. Dzyubenko I. M. Filimonov S. V. Frolov S. V. Golovkin Yu. L. Grishkin M. V. Gritzuk A. V. Jilin A. D. Kamenskii G. K. Kliger V. Z. Kolganov A. S. Konstantinov Yu. V. Korchagin A. P. Kozhevnikov V. P. Kubarovskii N. Yu. Kulman A. I. Kulyavtsev V. F. Kurshetsov A. E. Kushnirenko V. S. Lakaev L. G. Landsberg A. A. Lebedev G. S. Lomkatzi V. V. Molchanov V. A. Mukhin A. F. Nilov Yu. B. Novoghilov V. A. Prutskoi A. I. Sitnikov V. T. Smolyankin V. I. Solyanik D. V. Vavilov V. A. Victorov V. E. Vishnyakov 《Zeitschrift fur Physik C Particles and Fields》1994,61(2):223-227
The reactions of baryon diffractive productionp+N→(pK + K ?)+N, p+N→(p?)+N, p+N→[Λ(1520)K +]+N p+N→[Σ(1385) o K +]+N in the 70 GeV proton beam were studied. Very sensitive upper limits for the production cross sections of heavy narrow cryptoexotic baryon resonances with hidden strangeness were obtained. 相似文献
12.
Evdokimov AV Akgun U Alkhazov G Amaro-Reyes J Atamantchouk AG Ayan AS Balatz MY Bondar NF Cooper PS Dauwe LJ Davidenko GV Dersch U Dolgolenko AG Dzyubenko GB Edelstein R Emediato L Endler AM Engelfried J Eschrich I Escobar CO Filimonov IS Garcia FG Gaspero M Giller I Golovtsov VL Gouffon P Gülmez E Kangling H Iori M Jun SY Kaya M Kilmer J Kim VT Kochenda LM Konorov I Kozhevnikov AP Krivshich AG Krüger H Kubantsev MA Kubarovsky VP Kulyavtsev AI Kuropatkin NP Kurshetsov VF Kushnirenko A Kwan S 《Physical review letters》2004,93(24):242001
We report the first observation of a charm-strange meson D(+)(sJ)(2632) at a mass of 2632.5+/-1.7 MeV/c(2) in data from SELEX, the charm hadro-production experiment E781 at Fermilab. This state is seen in two decay modes, D(+)(s)eta and D0K+. In the D(+)(s)eta decay mode we observe a peak with 101 events over a combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c(2). There is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0 MeV/c(2) in the decay mode D0K+. The decay width of this state is <17 MeV/c(2) at 90% confidence level. The relative branching ratio Gamma(D0K+)/Gamma(D(+)(s)eta) is 0.14+/-0.06. The mechanism that keeps this state narrow is unclear. Its decay pattern is also unusual, being dominated by the D(+)(s)eta decay mode. 相似文献