Jul 4 – 11, 2018
Asia/Seoul timezone

Measurement of Bs and Y(5S) Decays with Belle

Jul 5, 2018, 2:00 PM
101 (COEX, Seoul)


COEX, Seoul

Parallel Strong Interactions and Hadron Physics Strong Interactions and Hadron Physics


Leo Piilonen (Virginia Tech)


The branching fraction of the decay Bs → Ds X has been measured by Belle and other experiments, but with indirect methods which have model-dependent limitations. We report a direct measurement of this decay by tagging one Bs from Y(5S) with semi-leptonic decay (Bs → Ds l nu), where several Ds decay modes are combined to increase the total statics. We also report a search for eta and eta' transitions from Y(5S) resonance to the lower bottomonia. These results are based on data sample of 121 /fb collected at the Y(5S) resonance by the Belle detector at the KEKB asymmetric-energy e+ e- collider. Other analyses on Bs and Y(5S) decays are also covered in this talk.

Primary authors

Shohei Nishida (KEK) Leo Piilonen (Virginia Tech)

Presentation materials