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

The reconstruction efficiency of photons and neutral pions is measured using the relative yields of reconstructed $B^+ \to J/ψK^{*+} (\to K^+ π^{0})$ and $B^+ \to J/ψK^{+}$ 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.

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