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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2002, vol. 65, p. 911041-911048

Measurement of Ds + and Ds*+ production in B meson decays and from continuum e+e- annihilation at √s = 10.6 GeV

Aubert B., Boutigny D., Gaillard J. M., Hicheur A., Karyotakis Y., Lees J. P., Robbe P., Tisserand V., Palano A., Pompili A., Chen G. P., Chen J. C., Qi N. D., Rong G., Wang P., Zhu Y. S., Eigen G., Stugu B., Abrams G. S., Borgland A. W., Breon A. B., Brown D. N., Button-Shafer J., Cahn R. N., Clark A. R., Gill M. S., Gritsan A. V., Groysman Y., Jacobsen R. G., Kadel R. W., Kadyk J., Kerth L. T., Kolomensky Yu G., Kral J. F., LeClerc C., Levi M. E., Lynch G., Oddone P. J., Perazzo A., Pripstein M., Roe N. A., Romosan A., Ronan M. T., Shelkov V. G., Telnov A. V., Wenzel W. A., Bright-Thomas P. G., Harrison T. J., Hawkes C. M., Knowles D. J., O'Neale S. W., Penny R. C., Watson A. T., Watson N. K., Deppermann T., Goetzen K., Koch H., Kunze M., Lewandowski B., Peters K., Schmuecker H., Steinke M., Andress J. C., Barlow N. R., Bhimji W., Chevalier N., Clark P. J., Cottingham W. N., Dyce N., Foster B., Mackay C., Wallom D., Wilson F. F., Abe K., Hearty C., Mattison T. S., McKenna J. A., Thiessen D., Jolly S., McKemey A. K., Blinov V. E., Bukin A. D., Bukin D. A., Buzykaev A. R., Golubev V. B., Ivanchenko V. N., Korol A. A., Kravchenko E. A., Onuchin A. P., Salnikov A. A., Serednyakov S. I., Skovpen Yu I., Telnov V. I., Yushkov A. N., Best D., Chao M., Lankford A. J., Mandelkern M., McMahon S., Stoker D. P.

New measurements of Ds + and Ds*+ meson production rates from B decays and from qq̄ continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1 of data on the Y(4S) resonance and 2.6 fb-1 off-resonance, we find the inclusive branching fractions B(B→Ds + X)=(10.93±0.19±0.58±2.73)% and B(B→Ds*+X)=(7.9±0.8±0.7 ±2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds +→φπ+ branching fraction uncertainty. The production cross sections σ(e+e- →Ds +X) × B(Ds +→φπ+)=7.55±0.20 ±0.34 pb and σ(e+e-→Ds *±X) × B(Ds +→φπ+) = 5.8±0.7±0.5 pb are measured at center-of-mass energies about 40 MeV below the Y(4S) mass. The branching fractions ΣB(B→Ds (*)+ D̄(*))=(5.07±0.14±0.30±1.27)% and ∑B(B→Ds *+D̄(*)) =(4.1±0.2±0.4±1.0)% are determined from the Ds (*)+ momentum spectra. The mass difference m(Ds +)-m(D+)=98.4±0.1 ±0.3 MeV/c2 is also measured.