Sensitivity of LHCb and its upgrade in the measurement of B(KS0→π0μ+μ−)\mathcal B(K_S^0\rightarrow\pi^0\mu^+\mu^-)

The sensitivity of the LHCb experiment to $\mathcal B(K_S^0\rightarrow\pi^0\mu^+\mu^-)$ is analyzed in light of the 2011, 2012 and 2016 data and the oportunities the full software trigger of the LHCb upgrade provides. Two strategies are considered: the full reconstruction of the decay products and the partial reconstruction using only the dilepton pair and kinematic constraints. In both cases, the sensitivity achieved can surpass the world's current best. Both approaches could be statistically combined, further improving the result

Upgrade trigger selection studies

This document describes the selection strategies for the upgrade trigger using a range of decay channels that are representative of the current, and planned, physics programme. The upgrade high-level trigger (HLT) follows the Run 2 trigger structure consisting of two stages, in between which the detector calibration and alignment is performed. In the first stage, HLT1, beauty and charm decays are selected inclusively, while the second stage, HLT2, uses offline-quality selections. Inclusive and exclusive trigger selections in HLT2 are presented, and the output rates, signal efficiencies, event sizes and bandwidth usage are discussed