Debjit Ghosh
Vishal Bhardwaj
Study of $B\rightarrow (\chi_{c1} \gamma) K$ Decay
The thesis aims to perform a sensitivity study of the $B \to X(3823) K \pi$ in the Belle II data set. If $X(3823)$ is $\psi(1\,^3D_{2})$ state with $J^{PC}=2^{--}$, like $\chi_{c2}$ ($J^{PC}=2^{++}$), its branching fraction of three body decay mode $B \rightarrow (\chi_{c1}\gamma) K \pi$ will be higher than its two body decay mode $B \rightarrow (\chi_{c1} \gamma) K$. We performed signal Monte Carlo study for the two and three body decay modes and estimated the reconstruction efficiency of $\psi(2S)$, $X(3823)$, and $X(3872)$. We improved the resolution of $M(\chi_{c1} \gamma)$ using the $\gamma$ energy scaling by forcing $\Delta E$ to be zero. We planned to do the background study in order to estimate the sensitivity. Due to the current COVID-19 scenario, we could not complete this task. However, we do provide the expected signal efficiency for the decay mode of interest.
eng
Indian Institute of Science Education and Research, Mohali
Mohali
2020
http://docs.belle2.org/record/3628/files/BELLE2-MTHESIS-2023-027.pdf;

Imported from Invenio.