Evidence for B-?Ds+K-l-vl and search for B-?Ds*+K-l-vl

October 23, 2012

Journal Article

Evidence for B-?Ds+K-l-vl and search for B-?Ds*+K-l-vl

Abstract

We report measurements of the decays B-?Ds(*)+K-l-?¯ l in a data sample containing 657×106BB¯ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe a signal with a significance of 6s for the combined Ds and Ds* modes and find the first evidence of the B-?Ds+K-l-v l decay with a significance of 3.4s. We measure the following branching fractions: B(B-?Ds+K-l-v l)=(0.30±0.09(stat)-0.08+0.11(syst))×10-3 and B(B-?Ds(*)+K-l-v l)=(0.59±0.12(stat)±0.15(syst))×10-3 and set an upper limit B(B-?Ds*+K-l-v l)

Revised: August 29, 2016 | Published: October 23, 2012

Citation

Stypula J., M. Rozanska, I. Adachi, K. Adamczyk, H. Aihara, D.M. Asner, and T. Aushev, et al. 2012. Evidence for B-?Ds+K-l-vl and search for B-?Ds*+K-l-vl. Physical Review D 86, no. 7:Article No. 072007. PNNL-SA-92406. doi:10.1103/PhysRevD.86.072007