000003601 001__ 3601
000003601 005__ 20230525052228.0
000003601 037__ $$aBELLE2-MTHESIS-2023-017
000003601 041__ $$aeng
000003601 100__ $$aShubhajit Sana
000003601 245__ $$aStudy of $\mathrm{B}^{+} \rightarrow \bar{\mathrm{D}}^{0}\pi^{+}\pi^{-}\pi^{+}$ at the Belle II experiment
000003601 260__ $$aChennai, India$$bIndian Institute of Technology Madras$$c2023
000003601 300__ $$a69
000003601 500__ $$aPresented on 15 05 2023
000003601 502__ $$aMSc$$bChennai, India, Indian Institute of Technology Madras$$c2023
000003601 520__ $$aWe have studied a rare decay channel  $\mathrm{B}^{+} \rightarrow \bar{\mathrm{D}}^{0}\pi^{+}\pi^{-}\pi^{+}$  using 200~fb$^{-1}$ Monte Carlo simulated data generated by the Belle-II software framework. Topological analysis is being performed to identify the major sources of peaking background and appropriate veto is being applied to suppress them. A Machine Learning algorithm has been utilized to distinguish between the signal and the dominant continuum background based on their distinctive topological characteristics. The measured value of the branching ratio for the decay channel is \textbf{(11.1 $\pm$ 0.1) $\times$ 10$^{-3}$}  which is consistent with the figure specified in the decay file used for the production of generic Monte Carlo (MC). However, this result encompasses the contribution from strong intermediate resonance states, such as $a^{-}_{1}$ and $\rho^{0}$.
000003601 700__ $$aProf. Jim Libby$$edir.
000003601 8560_ $$fph18b004@smail.iitm.ac.in
000003601 8564_ $$uhttps://docs.belle2.org/record/3601/files/BELLE2-MTHESIS-2023-017.pdf
000003601 980__ $$aTHESIS