Fig. 1From: Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2On the left, mass distributions of the decaying particles with the results of the fit superimposed; signal contributions are shown by the red dashed curves, and the total fit functions including background contributions are shown by the blue solid curves. On the right, the background-subtracted distributions of the calibration samples for electrons, muons, pions, kaons and protons as a function of the track pseudorapidity, η, and momentum p are shown. The colour scale units are arbitraryBack to article page