Publication Date
2010
Journal or Book Title
Physical Review D
Abstract
We present a study of the inclusive D*± production in the decay of Υ(1S) using (98.6±0.9)×106 Υ(2S) mesons collected with the BABAR detector at the Υ(2S) resonance. Using the decay chain Υ(2S)→π+π−Υ(1S), Υ(1S)→D*±X, where X is unobserved, we measure the branching fraction B[Υ(1S)→D*±X]=(2.52±0.13(stat)±0.15(syst))% and the D*± momentum distribution in the rest frame of the Υ(1S). We find evidence for an excess of D*± production over the expected rate from the virtual photon annihilation process Υ(1S)→γ∗→c¯c→D*±X.
DOI
https://doi.org/10.1103/PhysRevD.81.011102
Volume
81
Issue
1
Recommended Citation
The BABAR Collaboration, "Observation of inclusive D*(+/-) production in the decay of Y(1S)" (2010). Physical Review D. 646.
https://doi.org/10.1103/PhysRevD.81.011102