Performance of the Muon Identification at LHCb

By F. Archilli, W. Baldini, G. Bencivenni, N. Bondar, W. Bonivento, S. Cadeddu, P. Campana, A. Cardini, P. Ciambrone, X. Vidal and 31 more. 2013

199 citations recorded by the source corpus.

The performance of the muon identification in LHCb is extracted from data using muons and hadrons produced in J/ψ → μ+μ−, Λ0 → pπ− and D+→π+D0(K−π+) 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%.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5d421b2926f829c4f3c1461666b6e6c0dc7a4286

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In Nuclear and High Energy Physics

1. G. Lanfranchi
2. T. Blake
3. Simone Bifani
4. M. Schune
5. A. Vidal
6. Vladimir Vava Gligorov
7. U. Egede
8. N. Serra

Citations in the corpus

• Study of J/ψ production and cold nuclear matter effects in pPb collisions at $ \sqrt{{{s_{NN }}}} $ = 5 TeV (2013, methodology): “To suppress combinatorial background, the difference between the logarithms of the likelihoods for the muon and the pion hypotheses DLLμπ [16, 27] is required to be greater than 1.”
• The PIDCalib package (2016, methodology): “The distributions of the PID variables of these PID-unbiased samples were used as input for the analyses studying CP violation in the decay B±→ D0K± in order to measure the CKM angle γ [6–8].”
• Determination of the quark coupling strength |Vub| using baryonic decays (2015, background): “04% of muons being identified correctly as muons and around 1% of charged hadrons being misidentified as muons [58].”
• Test of lepton universality using b+ → K+ℓ+ℓ- decays. (2014, background): “Muons are initially identified by tracks that penetrate the calorimeters and the iron filters in the muon stations [15].”