Search for B0→X(3872)γ
Citations Over TimeTop 11% of 2019 papers
Abstract
We report the results of a search for the decay ${B}^{0}\ensuremath{\rightarrow}X(3872)(\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})\ensuremath{\gamma}$. The analysis is performed on a data sample corresponding to an integrated luminosity of $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ and containing $772\ifmmode\times\else\texttimes\fi{}{10}^{6}B\overline{B}$ pairs, collected with the Belle detector at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider running at the $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance energy. We find no evidence for a signal and place an upper limit of $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}X(3872)\ensuremath{\gamma})\ifmmode\times\else\texttimes\fi{}\mathcal{B}(X(3872)\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})<5.1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$ at 90% confidence level.