Abstract
The decay \(B^0 \rightarrow J/\psi \gamma \) is investigated using \(B\bar{B}\) events collected at the \(\varUpsilon \)(4S) resonance with the Belle detector at the KEKB asymmetric-energy \(e^+e^-\) collider. Event selection is carried out by using standard criteria, and a reconstruction efficiency of \((33.9\pm 0.2)\%\) is obtained. The background is estimated using large inclusive \(J/\psi \) Monte Carlo sample and is mainly dominated by the decays \(B^0 \rightarrow J/\psi \pi ^0\), \(B^0 \rightarrow J/\psi \eta \) and \(B^0 \rightarrow J/\psi K_L\). If there is any enhancement in the decay rate of \(B^0 \rightarrow J/\psi \gamma \), it will be sensitive to charged right-handed currents \((V+A)\) in addition of \((V-A)\), and this admixture will give a significant contribution to new physics.
Rajeev Kumar—Belle Collaboration.
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- 1.
The charge conjigation is applied throughout.
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Kumar, R. (2019). Search of Rare Annihilation Decay at Belle. In: Giri, A., Mohanta, R. (eds) 16th Conference on Flavor Physics and CP Violation. FPCP 2018. Springer Proceedings in Physics, vol 234. Springer, Cham. https://doi.org/10.1007/978-3-030-29622-3_15
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