D-Meson branching ratios and hadronic Charm production cross sections

none81noneM. Aguilar-Benitez; W.W.M. Allis; P. Bagnaia; J. Baland; W. Bartl; Y.A. Belokopytov; G. Bertrand-Coremans; A. Bettini; R. Bizzarri; M. Boratov; G. Borreani; F. Bruyant; E. Castelli; P. Checchia; P.V. Chliapnikov; G. Ciapetti; D. Crennell; H. Dibon; E. Di Capua; J. Duboc; J. Dumarchez; F. Etienne; A. Ferrand; C. Fisher; U. Gaspari; S. Gentile; P. Girtler; J. Hernandez; P. Herquet; S.O. Holmgre; J. Hrubec; P.T. Hughes; M. Iori; K.E. Johanss; E.P. Kistenevℓ; W. Kittel; N. Kurtz; J. Lemonne; H. Leutz; M. MacDermott; F. Marchetto; M. Markytan; F. Marzano; M. Mazzucato; M.E. Michalon-Mentzer; A. Michalon; T. Moa; L. Montanet; G. Neuhofer; H. Nguye; S. Nilss; P. Pilette; C. Pinori; G. Piredda; C. Poiret; B.F. Poljakovℓ; A. Popplet; P. Poropat; P. Porth; S. Reucroft; J. Richards; G. Rinaudo; H. Rohringer; M. Sessa; A. Stergiou; A. Subramania; D. Toet; M.C. Touboul; A.M. Touchard; C. Troncon; M. Van Immerseel; L. Ventura; P. Vilai; C. Voltolini; B. Vonc; J. Wickens; P.R.S. Wright; V.A. Yarba; L. Zanello; P. Zotto; G. ZumerleM., Aguilar Benitez; W. W. M., Allis; P., Bagnaia; J., Baland; W., Bartl; Y. A., Belokopytov; G., Bertrand Coremans; Bettini, Alessandro; R., Bizzarri; M., Boratov; G., Borreani; F., Bruyant; E., Castelli; P., Checchia; P. V., Chliapnikov; G., Ciapetti; D., Crennell; H., Dibon; E., Di Capua; J., Duboc; J., Dumarchez; F., Etienne; A., Ferrand; C., Fisher; U., Gaspari; S., Gentile; P., Girtler; J., Hernandez; P., Herquet; S. O., Holmgre; J., Hrubec; P. T., Hughes; M., Iori; K. E., Johanss; E. P., Kistenevℓ; W., Kittel; N., Kurtz; J., Lemonne; H., Leutz; M., Macdermott; F., Marchetto; M., Markytan; F., Marzano; M., Mazzucato; M. E., Michalon Mentzer; A., Michalon; T., Moa; L., Montanet; G., Neuhofer; H., Nguye; S., Nilss; P., Pilette; C., Pinori; G., Piredda; C., Poiret; B. F., Poljakovℓ; A., Popplet; P., Poropat; P., Porth; S., Reucroft; J., Richards; G., Rinaudo; H., Rohringer; M., Sessa; A., Stergiou; A., Subramania; D., Toet; M. C., Touboul; A. M., Touchard; C., Troncon; M., Van Immerseel; Ventura, Luigi; P., Vilai; C., Voltolini; B., Vonc; J., Wickens; P. R. S., Wright; V. A., Yarba; L., Zanello; Zotto, Pierluigi; Zumerle, Giann

LIFETIME MEASUREMENT OF CHARM MESONS PRODUCED IN pi- p AND p p INTERACTIONS AT 360-GeV/c

Results are presented on charm meson lifetimes. The sample of charm particle decays was obtained by exposing the high resolution rapid cycling hydrogen bubble chamber (LEBC) coupled with the European Hybrid Spectrometer to \u3c0 12 and p beams at 360 GeV/c from the CERN SPS. The analysis of 3c850 k pictures has yielded 77 events containing a total of 60 charm decays. From these, an unbiased sample of 31 D decays (15\ub1 and 16 D0) is issued in the lifetime analysis. The measured mean lifetimes for D\ub1 and D0 are (where the symbol D0 means D0 and D0):\u3c4(D\ub1)=8.4+3.5 122.2 7 10 1213s\u3c4(D0)=4.1+1.3 120.9 710 1213s. Three unambiguous examples of F\ub1 decay have also been observed and the corresponding lifetime, based on 2 decays, is \u3c4(F\ub1)=2.1 +3.6 120.8 7 10 1213

LAMBDA(c) PRODUCTION CHARACTERISTICS IN PROTON PROTON INTERACTIONS AT 400-GeV/c

We present the measurements of the Λc production cross section in proton-proton interactions at View the MathML source and give new limits on the exclusive branching ratio Λc→pK+π−