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Search for radiative B decays to orbitally excited mesons at LHCb / Quintana, Boris Julien
This document presents studies of radiative decays of $B^0$ and $B_s$ mesons to orbitally excited states, produced in proton collisions at the Large Hadron Collider (LHC) of CERN (European Council for Nuclear Research) [...]
CERN-THESIS-2020-004 - 173 p.

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2. Neutral particles identification at LHCb
Reference: Poster-2018-633
Created: 2018. -1 p
Creator(s): Quintana, Boris Julien

Important analyses of the core LHCb physics program rely on calorimetry to identify photons, high-energy neutral pions and electrons. For this purpose, the LHCb calorimeter system is composed of a scintillating pad plane, a preshower detector, an electromagnetic and a hadronic sampling calorimeters. The interaction of a given particle in these detectors leaves a specific signature. This is exploited for particle identification (PID) by combining calorimeters and tracking information into multi-variate classifiers. In this contribution, we focus on the identification of photons against high-energy neutral pion and hadronic backgrounds. Performance on Run 1 data will be shown. Small discrepancies with simulation predictions are then discussed, with special emphasis on the methods to correctly estimate PID cut efficiencies by means of large calibration samples of abundant beauty and charm decays to final states with photons. Finally, the technical aspects of the collection of these samples in Run 2 are presented.

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See also: similar author names
5 Quintana, B
1 Quintana, B A
1 Quintana, B J
9 Quintana, B.
182 Quintana, Boris
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