New algorithms for identifying the flavour of [Formula: see text] mesons using pions and protons

Eur Phys J C Part Fields. 2017;77(4):238. doi: 10.1140/epjc/s10052-017-4731-y. Epub 2017 Apr 12.

Abstract

Two new algorithms for use in the analysis of [Formula: see text] collision are developed to identify the flavour of [Formula: see text] mesons at production using pions and protons from the hadronization process. The algorithms are optimized and calibrated on data, using [Formula: see text] decays from [Formula: see text] collision data collected by LHCb at centre-of-mass energies of 7 and 8 TeV . The tagging power of the new pion algorithm is 60% greater than the previously available one; the algorithm using protons to identify the flavour of a [Formula: see text] meson is the first of its kind.