Identification of beauty and charm quark jets at LHCb

Abstract

Identification of jets originating from beauty and charm quarks is important for measuring Standard Model processes and for searching for new physics. The performance of algorithms developed to select $b$- and $c$-quark jets is measured using data recorded by LHCb from proton-proton collisions at $\sqrt{s}=7$ TeV in 2011 and at $\sqrt{s}=8$ TeV in 2012. The efficiency for identifying a $b(c)$ jet is about 65%(25%) with a probability for misidentifying a light-parton jet of 0.3% for jets with transverse momentum $p_{\mathrm{T}}>20$ GeV and pseudorapidity $2.2<\eta <4.2$. The dependence of the performance on the $p_{\mathrm{T}}$ and $\eta$ of the jet is also measured.

References in corpus (5)

• Big-Bang Nucleosynthesis
• Performance of the LHCb Vertex Locator
• Study of $W$ boson production in association with beauty and charm
• First measurement of the charge asymmetry in beauty-quark pair production at a hadron collider
• Measurement of the Z+b-jet cross-section in pp collisions at $\sqrt{s}=7\mathrm{Te}\mathrm{V}$ in the forward region

Cited by in corpus (45)

• The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II
• Optimizing Event Selection with the Random Grid Search
• Searching for Confining Hidden Valleys at the LHC(b)
• Detector and Physics Performance at a Muon Collider
• Associated production of a Higgs boson decaying into bottom quarks and a weak vector boson decaying leptonically at NNLO in QCD
• Aligned and Spontaneous Flavor Violation
• First observation of top quark production in the forward region
• Study of $W$ boson production in association with beauty and charm
• Unleashing the full power of LHCb to probe Stealth New Physics
• Predictions for $\mathrm{Z}$-boson production in association with a $\mathrm{b}$-jet at $\mathcal{O}({\alpha }_s^3)$
• A direct probe of the intrinsic charm content of the proton
• Quantum Machine Learning for $b$-jet charge identification
• Disentangling Heavy Flavor at Colliders
• Searches for low-mass dimuon resonances
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Measurements of the charm jet cross section and nuclear modification factor in pPb collisions at sqrt(s[NN]) = 5.02 TeV
• Study of $Z$ bosons produced in association with charm in the forward region
• Measurement of charged hadron production in $Z$-tagged jets in proton-proton collisions at $\sqrt{s}=8$ TeV
• Stacking machine learning classifiers to identify Higgs bosons at the LHC
• Mapping the material in the LHCb vertex locator using secondary hadronic interactions
• Measurement of forward top pair production in the dilepton channel in $pp$ collisions at $\sqrt{s}=13$ TeV
• NNLO QCD predictions for Z-boson production in association with a charm jet within the LHCb fiducial region
• Measurement of forward $t\overline{t}$, $W+b\overline{b}$ and $W+c\overline{c}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV
• Measurement of associated Z + charm production in proton-proton collisions at $\sqrt{s}=$ 8 TeV
• Beauty-quark and charm-quark pair production asymmetries at LHCb
• Bottom production in Photon and Pomeron -- induced interactions at the LHC
• Search for the $t\to ch$ decay at hadron colliders
• The history of LHCb
• Class Imbalance Techniques for High Energy Physics
• Measurement of the production cross section for a W boson in association with a charm quark in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Asymmetric heavy-quark hadroproduction at LHCb: Predictions and applications
• Search for long-lived particles decaying to final states with a pair of muons in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV
• Measurement of differential $b\bar{b}$- and $c\bar{c}$-dijet cross-sections in the forward region of $pp$ collisions at $\sqrt{s}=13\mathrm{TeV}$
• Double-charming Higgs identification using machine-learning assisted jet shapes
• Identification of charm jets at LHCb
• First observation of forward $Z\to b\bar{b}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV
• Production of forward heavy-flavour dijets at the LHCb within $k_T$-factorization approach
• Probing the mass effect of heavy quark jets in high-energy nuclear collisions
• A brief review of measurements of electroweak bosons at the LHCb experiment in LHC Run 1
• Review of recent LHCb results and prospects for Run II
• Experimental aspects of jet physics at LHC
• Searches for Majorana Neutrinos and Direct Searches for Exotics at LHCb
• Forward W + c, b-jet and Top Measurements with LHCb
• Observation of Top Quark Production in the Forward Region at LHCb
• Forward EW Physics at the LHC