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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2006, vol. 74, p. -

Measurement of the D+→π+π0 and D+→K+π0 branching fractions

Aubert B., Barate R., Bona M., Boutigny D., Couderc F., Karyotakis Y., Lees J. P., Poireau V., Tisserand V., Zghiche A., Grauges E., Palano A., Chen J. C., Qi N. D., Rong G., Wang P., Zhu Y. S., Eigen G., Ofte I., Stugu B., Abrams G. S., Battaglia M., Brown D. N., Button-Shafer J., Cahn R. N., Charles E., Gill M. S., Groysman Y., Jacobsen R. G., Kadyk J. A., 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., Goetzen K., Held T., Koch H., Lewandowski B., Pelizaeus M., Peters K., Schroeder T., Steinke M., Boyd J. T., Burke J. P., Cottingham W. N., Walker D., Cuhadar-Donszelmann T., Fulsom B. G., Hearty C., Knecht N. S., Mattison T. S., McKenna J. A., Khan A., Kyberd P., Saleem M., Teodorescu L., Blinov V. E., Bukin A. D., Druzhinin V. P., Golubev V. B., Onuchin A. P., Serednyakov S. I., Skovpen Yu I., Solodov E. P., Todyshev K. Yu, Best D. S., Bondioli M., Bruinsma M., Chao M., Curry S., Eschrich I., Kirkby D., Lankford A. J., Lund P., Mandelkern M., Mommsen R. K., Roethel W., Stoker D. P., Abachi S., Buchanan C., Foulkes S. D., Gary J. W., Long O., Shen B. C., Wang K., Zhang L.

We present measurements of the branching fractions for the Cabbibo suppressed decays D+→π+π0 and D+→K+π0 based on a data sample corresponding to an integrated luminosity of 124.3fb-1. The data were taken with the BABAR detector at the PEP-II B Factory operating on and near the Υ(4S) resonance. We find B(D+→π+π0)=(1.25±0.10±0. 09±0.04)×10-3 and B(D+→K+π0)=(2.52±0.47±0. 25±0.08)×10-4, where the first uncertainty is statistical, the second systematic and the last error is due to the uncertainties in the absolute branching fraction scale for D+ mesons. This represents the first observation of the doubly Cabibbo-suppressed D+→K+π0 decay mode and a new measurement of the D+→π+π0 branching fraction. © 2006 The American Physical Society.