Speaker
Description
The resonance state $X(3872)$, also known as $\chi_{c1}(3872)$ was discovered by the Belle collaboration in 2003 in the decay $B^{+} \rightarrow X(3872) K^+$ where $X(3872)\rightarrow J/\psi\pi^+\pi^-$. Still its nature is not well known in spite of a lot of studies carried out on this state. Currently,$X(3872)$ is a strong contender for tetraquark, $D^0\bar{D^{*0}}$molecule, admixture of $\chi_{c1}(2P)$ and $D^0\bar{D^{*0}}$ molecule state. Radiative decays of $X(3872)$, $X(3872)\rightarrow\psi(2S)\gamma$ and $X(3872)\rightarrow J\psi\gamma$ can shade light on the structure of the state. Recently LHCb has measured the ratio of branching fractions of these two modes, $R_{\psi\gamma}$ and supported Belle measurement over BaBar. However, there is still some conflict between LHCb and BESIII. Belle and Belle II combined study can help in solving this conflict. We plan to present a preliminary Monte Carlo (MC) study of signal and background for these decay modes.
| Track type | Flavour Physics |
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