Current Location:home > Browse

1. chinaXiv:201609.00808 [pdf]

Observation of the decay $B_s^0\rightarrow K^0\overlineK^0$

Pal, B. and others
Subjects: Physics >> Nuclear Physics

We measure the decay?B0s→K0K?????0?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→K0K?????0)=[19.6+5.8?5.1(stat.)±1.0(sys.)±2.0(NB0sB????0s)]×10?6?with a significance of 5.1 standard deviations. This measurement constitutes the first observation of this decay.

submitted time 2016-09-12 Hits1089Downloads572 Comment 0

2. chinaXiv:201609.00227 [pdf]

Evidence for the decay $B^0 \to \eta \pi^0$

Pal, B. and others
Subjects: Physics >> Nuclear Physics

We report a search for the charmless hadronic decay?B0→ηπ0?with a data sample corresponding to an integrated luminosity of 694?fb?1?containing?753×106?BB??pairs. The data were collected by the Belle experiment running on the?Υ(4S)?resonance at the KEKB?e+e??collider. We measure a branching fraction?B(B0→ηπ0)=(4.1+1.7+0.5?1.5?0.7)×10?7, where the first uncertainty is statistical and the second is systematic. Our measurement gives an upper limit of?B(B0→ηπ0)<6.5×10?7?at 90\% confidence level. The signal has a significance of?3.0?standard deviations and constitutes the first evidence for this decay mode.

submitted time 2016-09-09 Hits364Downloads220 Comment 0

  [1 Pages/ 2 Totals]