Momentum scale calibration of the LHCb spectrometer

Abstract

For accurate determination of particle masses accurate knowledge of the momentum scale of the detectors is crucial. The procedure used to calibrate the momentum scale of the LHCb spectrometer is described and illustrated using the performance obtained with an integrated luminosity of $1.6f{b}^{-1}$ collected during 2016 in $pp$ running. The procedure uses large samples of $J/\ddot{I}ˆ\to \hat{I}{¼}^{+}\hat{I}{¼}^{-}$ and $B^{+}\to J/\ddot{I}ˆK^{+}$ decays and leads to a relative accuracy of $3\times 10^{-4}$ on the momentum scale.

All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-DP-2023-003.html (LHCb public pages)