Journal
JOURNAL OF INSTRUMENTATION
Volume 8, Issue -, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1748-0221/8/10/P10020
Keywords
Particle identification methods; Performance of High Energy Physics Detectors
Categories
Funding
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- CERN
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- HGF (Germany)
- MPG (Germany)
- SFI (Ireland)
- INFN (Italy)
- FOM (The Netherlands)
- NWO (The Netherlands)
- SCSR (Poland)
- ANCS (Romania)
- MinES of Russia (Russia)
- Rosatom (Russia)
- MICINN (Spain)
- XuntaGal (Spain)
- GENCAT (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NAS Ukraine (Ukraine)
- STFC (United Kingdom)
- NSF (U.S.A.)
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The performance of the muon identification in LHCb is extracted from data using muons and hadrons produced in J/psi -> mu(+)mu(-), Lambda(0) -> p pi(-) and D star+ -> pi D-+(0) (K-pi(+)) decays. The muon identification procedure is based on the pattern of hits in the muon chambers. A momentum dependent binary requirement is used to reduce the probability of hadrons to be misidentified as muons to the level of 1%, keeping the muon efficiency in the range of 95-98%. As further refinement, a likelihood is built for the muon and non-muon hypotheses. Adding a requirement on this likelihood that provides a total muon efficiency at the level of 93%, the hadron misidentification probabilities are below 0.6%.
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