Evidence for B to K eta' gamma Decays at Belle
Abstract
We present the results of a search for the radiative decay (B -> K eta' gamma) and find evidence for (B^+ -> K^+ eta' gamma) decays at the 3.3 standard deviation level with a partial branching fraction of (3.6 +/- 1.2 +/- 0.4) x 10e-6, where the first error is statistical and the second systematic. This measurement is restricted to the region of combined (K eta') invariant mass less than 3.4GeVc^2. A 90% confidence level upper limit of 6.4 x 10e-6 is obtained for the decay (B^0 -> K^0 eta' gamma) in the same (K eta') invariant mass region. These results are obtained from a 605 fb^-1 data sample containing 657 x 10e6 B anti-B pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider.
Cite
@article{arxiv.0810.0804,
title = {Evidence for B to K eta' gamma Decays at Belle},
author = {Belle Collaboration and R. Wedd},
journal= {arXiv preprint arXiv:0810.0804},
year = {2014}
}
Comments
5 pages, 4 figures. Submitted to PRD-RC on 6/8/09