Department
Physics
Document Type
Article
Publication Date
4-22-2016
Abstract
We measure the decay B0s→K0¯K0 using data collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e− collider. The data sample used corresponds to an integrated luminosity of 121.4 fb−1. We measure a branching fraction B(B0s→K0¯K0)=[19.6+5.8−5.1(stat)±1.0(syst)±2.0(NB0s¯B0s)]×10−6 with a significance of 5.1 standard deviations. This measurement constitutes the first observation of this decay
Journal Title
Physical Review Letters
Journal ISSN
1079-7114
Volume
116
Issue
16
Digital Object Identifier (DOI)
10.1103/PhysRevLett.116.161801