First Measurement of Inclusive B→Xsη Decays
Abstract
We report a first measurement of inclusive B→Xsη decays, where Xs is a charmless state with unit strangeness. The measurement is based on a pseudoinclusive reconstruction technique and uses a sample of 657×106BB¯ pairs accumulated with the Belle detector at the KEKB e+e- collider. For MXs<2.6GeV/c2, we measure a branching fraction of [26.1±3.0(stat)-2.1+1.9(syst)-7.1+4.0(model)]×10-5 and a direct CP asymmetry of ACP=-0.13±0.04-0.03+0.02. Over half of the signal occurs in the range MXs>1.8GeV/c2.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 2010
- DOI:
- arXiv:
- arXiv:0910.4751
- Bibcode:
- 2010PhRvL.105s1803N
- Keywords:
-
- 13.25.Hw;
- 13.30.Eg;
- 14.40.Nd;
- Decays of bottom mesons;
- Hadronic decays;
- Bottom mesons;
- High Energy Physics - Experiment
- E-Print:
- 6 pages, 1 figure, 1 table, submitted to Physical Review Letters