Search for the Decay $B_{s} \rightarrow \eta' X_{s\bar{s}}$ at Belle

by Shawn Dubey (UHM)

Friday Dec 11, 2020, 2:30 PM → 4:30 PM Pacific/Honolulu

112 (WAT)

Studies of $B$-mesons have yielded many insights into our understanding of fundamental interactions. One way to study them is by using a method known as an inclusive analysis, whereby several sub-decays are reconstructed. In this presentation we search for the decay $B_{s} \rightarrow \eta' X_{s\bar{s}}$ using 121.4 fb$^{-1}$ of $\Upsilon(5S)$ on-resonance data. A semi-inclusive reconstruction method whereby the $X_{s\overline{s}}$ is reconstructed as a system of two kaons and up to four pions, with at most one neutral pion, is used. Using the $\eta'$ sub-decay mode $\eta' \rightarrow \eta \pi^{+} \pi^{-}$ and examining the $X_{s\overline{s}}$ mass range M($X_{s\bar{s}}$) $\leq$ 2.4 GeV/c$^{2}$, an upper limit confidence is set. This helps provide information on an oft-overlooked particle, the $B_{s}^{0}$, and helps elucidate contributions due to penguin diagrams.

This presentation will be in WAT 112 or broadcast virtually using Belle II’s in-house presentation app, SpeakApp. The SpeakApp link is https://speakapp.link/to/DzLldw. There is no requirement to register (attendees can sign in as a guest) or download anything, nor should there be a password requirement to attend this meeting. If there are technical difficulties in using this, please email sdubey@hawaii.edu between 2:00-2:30pm Friday, Dec. 11.