Study of photon reconstruction efficiency using $B^+ \to J/\psi K^{(*)+}$ decays in the LHCb experiment

TL;DR

This paper measures the photon and neutral pion reconstruction efficiency in the LHCb experiment by comparing specific B+ decay channels using data from proton-proton collisions at 7 and 8 TeV.

Contribution

It introduces a method to determine photon and neutral pion efficiencies using B+ decay channels in LHCb data, providing valuable calibration for future analyses.

Findings

Photon and neutral pion efficiencies measured with data.

Results aid in improving accuracy of photon-related measurements.

Method applicable to other decay channels and experiments.

Abstract

The reconstruction efficiency of photons and neutral pions is measured using the relative yields of reconstructed $B^+ \to J/\psi K^{*+} (\to K^+ \pi^{0})$ and $B^+ \to J/\psi K^{+}$ decays. The efficiency is studied using the data set, corresponding to an integrated luminosity of $3~\mathrm{fb}^{-1}$, collected by the LHCb experiment in proton-proton collisions at the centre-of-mass energies of 7 and 8 TeV.