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Search for the decay $B^0_s \rightarrow \pi^0 \pi^0$ at Belle
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arxiv 2301.08587 v1 pith:FCXRRAE3 submitted 2023-01-20 hep-ex
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abstract
We report the results of the first search for the decay $B_s^0\rightarrow\pi^0\pi^0$ using $121.4\ \rm fb^{-1}$ of data collected at the $\Upsilon(5\rm S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We observe no signal and set a 90\% confidence level upper limit of $7.7\times 10^{-6}$ on the $B_s^0\rightarrow\pi^0\pi^0$ decay branching fraction.
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