Rare decays: A window on new physics

TL;DR

This paper discusses extrapolated measurements of rare B meson decays involving flavor-changing-neutral-current processes, aiming to explore potential signs of new physics with future Belle II data.

Contribution

It provides projected measurements and analyses of rare B decay processes using extrapolated data, enhancing the search for new physics beyond the Standard Model.

Findings

Projected branching fractions and asymmetries with 5 and 50 ab$^{-1}$ data

Potential sensitivity improvements for rare decay searches

Insights into flavor physics and new physics constraints

Abstract

We report on the extrapolated measurements related to the flavour-changing-neutral-current(FCNC) $b\rightarrow s$ and $b\rightarrow d$ transitions with the Belle II data. The branching fraction(BF) and raw asymmetry measurements of the exclusive decay $\bar{B}\rightarrow X_{q}\gamma$, time-dependent $CP$ asymmetry in the transition $b\rightarrow s\gamma$, angular analysis of $B\rightarrow K^*ll$ and $B\rightarrow X_sll$ are discussed. We also report on the searches for the decay $B\rightarrow h\nu\nu$. Most of these analyses are extrapolated with 5 and 50 ab$^{-1}$ Belle II data.