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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2005, vol. 95, p. -

Production and decay of ≡c0 at BABAR

Aubert B., Barate R., Boutigny D., Couderc F., Karyotakis Y., Lees J. P., Poireau V., Tisserand V., Zghiche A., Grauges E., Palano A., Pappagallo M., Pompili A., Chen J. C., Qi N. D., Rong G., Wang P., Zhu Y. S., Eigen G., Ofte I., Stugu B., Abrams G. S., Borgland A. W., Breon A. B., Brown D. N., Button-Shafer J., Cahn R. N., Charles E., Day C. T., Gill M. S., Gritsan A. V., Groysman Y., Jacobsen R. G., Kadel R. W., Kadyk J., Kerth L. T., Kolomensky Yu G., Kukartsev G., Lynch G., Mir L. M., Oddone P. J., Orimoto T. J., Pripstein M., Roe N. A., Ronan M. T., Wenzel W. A., Barrett M., Ford K. E., Harrison T. J., Hart A. J., Hawkes C. M., Morgan S. E., Watson A. T., Fritsch M., Goetzen K., Held T., Koch H., Lewandowski B., Pelizaeus M., Peters K., Schroeder T., Steinke M., Boyd J. T., Burke J. P., Chevalier N., Cottingham W. N., Kelly M. P., Cuhadar-Donszelmann T., Hearty C., Knecht N. S., Mattison T. S., McKenna J. A., Thiessen D., Khan A., Kyberd P., Teodorescu L., Blinov A. E., Blinov V. E., Bukin A. D., Druzhinin V. P., Golubev V. B., Ivanchenko V. N., Kravchenko E. A., Onuchin A. P., Serednyakov S. I., Skovpen Yu I., Solodov E. P., Yushkov A. N., Best D., Bondioli M., Bruinsma M., Chao M., Eschrich I., Kirkby D., Lankford A. J., Mandelkern M., Mommsen R. K., Roethel W., Stoker D. P.

Using 116.1fb-1 of data collected by the BABAR detector, we present an analysis of Ξc0 production in B decays and from the cc continuum, with the Î≡c0 decaying into Ω-K+ and Î≡- Ï€+ final states. We measure the ratio of branching fractions B(Î≡c0â†'Ω-K+)/B(Î≡c0â †'Î≡-Ï€+) to be 0.294±0. 018±0.016, where the first uncertainty is statistical and the second is systematic. The Î≡c0 momentum spectrum is measured on and 40 MeV below the Î¥(4S) resonance. From these spectra the branching fraction product B(Bâ†'Î≡c0X)Ã- B(Î≡c0â†'Î≡-Ï€+) is measured to be (2.11±0.19±0.25)Ã-10-4, and the cross-section product σ(e+e-â†'Î≡c0X)Ã- B(Î≡c0â†'Î≡-Ï€+) from the continuum is measured to be (388±39±41)fb at a center-of-mass energy of 10.58 GeV. © 2005 The American Physical Society.