Measurement of inclusive charged-particle b-jet production in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV

Abstract

A measurement of the inclusive b-jet production cross section is presented in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV, using data collected with the ALICE detector at the LHC. The jets were reconstructed in the central rapidity region $|\eta |<0.5$ from charged particles using the anti-$k_{\mathrm{T}}$ algorithm with resolution parameter $R=0.4$. Identification of b jets exploits the long lifetime of b hadrons, using the properties of secondary vertices and impact parameter distributions. The $p_{\mathrm{T}}$-differential inclusive production cross section of b jets, as well as the corresponding inclusive b-jet fraction, are reported for pp and p-Pb collisions in the jet transverse momentum range $10\le p_{\text{T, ch jet}}\le 100$ GeV/$c$, together with the nuclear modification factor, $R_{\mathrm{pPb}}^{\text{b-jet}}$. The analysis thus extends the lower $p_{\mathrm{T}}$ limit of b-jet measurements at the LHC. The nuclear modification factor is found to be consistent with unity, indicating that the production of b jets in p-Pb at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV is not affected by cold nuclear matter effects within the current precision. The measurements are well reproduced by POWHEG NLO pQCD calculations with PYTHIA fragmentation.

arXiv comment35 pages, 16 captioned figures, 2 tables, authors from page 30, published version, figures at http://alice-publications.web.cern.ch/node/7411

References in corpus (65)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The anti-k_t jet clustering algorithm
• FastJet user manual
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Glauber Modeling in High Energy Nuclear Collisions
• New parton distribution functions from a global analysis of quantum chromodynamics
• EPOS LHC : test of collective hadronization with LHC data
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Pileup subtraction using jet areas
• Suppression of Hadrons with Large Transverse Momentum in Central Au+Au Collisions at $sqrt {s sub {sub {NN}}}_ = 130 GeV
• Performance of the ALICE Experiment at the CERN LHC
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Identification of b-quark jets with the CMS experiment
• SVD Approach to Data Unfolding
• EPPS16: Nuclear parton distributions with LHC data
• Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Study of high-pT charged particle suppression in PbPb compared to pp collisions at sqrt(sNN)=2.76 TeV
• Performance of the ALICE VZERO system
• Determination of nuclear parton distribution functions and their uncertainties at next-to-leading order
• Nuclear parton distributions at next to leading order
• Medium-Induced Gluon Radiation off Massive Quarks Fills the Dead Cone
• Jet Tomography of Hot and Cold Nuclear Matter
• Production of pions, kaons and protons in pp collisions at $\sqrt{s}=900$ GeV with ALICE at the LHC
• Jet Quenching in Thin Quark-Gluon Plasmas I: Formalism
• Jet pair production in POWHEG
• A light-cone wavefunction approach to open heavy flavor dynamics in QCD matter
• Transverse momentum spectra and nuclear modification factors of charged particles in pp, p-Pb and Pb-Pb collisions at the LHC
• Study of the inclusive production of charged pions, kaons, and protons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV
• Measurement of jet suppression in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Bayesian Inference in Processing Experimental Data: Principles and Basic Applications
• An improved global analysis of nuclear parton distribution functions including RHIC data
• Measurement of charged jet suppression in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• The scale dependent nuclear effects in parton distributions for practical applications
• Heavy quark pair production in high energy pA collisions: Open heavy flavors
• Measurement of the splitting function in pp and PbPb collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=$ 5.02 TeV
• Centrality and transverse momentum dependence of $D^0$-meson production at mid-rapidity in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200\mathrm{GeV}$
• Multi-strange baryon production in pp collisions at $\sqrt{s}$ = 7 TeV with ALICE
• b-Jet Identification in the D0 Experiment
• Coherent QCD multiple scattering in proton-nucleus collisions
• Sensitivity of jet substructure to jet-induced medium response
• Measurement of event background fluctuations for charged particle jet reconstruction in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Measurements of inclusive jet spectra in pp and central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Groomed jets in heavy-ion collisions: sensitivity to medium-induced bremsstrahlung
• Exploration of jet substructure using iterative declustering in pp and Pb-Pb collisions at LHC energies
• First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC
• Measurement of charged jet production cross sections and nuclear modification in p-Pb collisions at $\sqrt{s_\rm{NN}} = 5.02$ TeV
• Production of light-flavor hadrons in pp collisions at $\sqrt{s}$ = 7 and $\sqrt{s}$ = 13 TeV
• Nuclear effects in the Drell-Yan process at very high energies
• nNNPDF2.0: Quark Flavor Separation in Nuclei from LHC Data
• Shape, transverse size, and charged-hadron multiplicity of jets in pp collisions at sqrt(s) = 7 TeV
• Measurement of visible cross sections in proton-lead collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV in van der Meer scans with the ALICE detector
• Broadening of Transverse Momentum of Partons Propagating through a Medium
• Multiple scattering effects on heavy meson production in p+A collisions at backward rapidity
• b-tagging in DELPHI at LEP
• Measurement of prompt D${}^0$, D${}^{+}$, D${}^{\ast +}$, and D${}_s^{+}$ production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Transverse momentum spectra of b jets in pPb collisions at sqrt(s[NN]) = 5.02 TeV
• Quarkonium production in ultra-relativistic nuclear collisions: suppression vs. enhancement
• Measurement of the underlying event activity in pp collisions at sqrt(s) = 0.9 and 7 TeV with the novel jet-area/median approach
• Measurement of the production of charm jets tagged with D${}^0$ mesons in pp collisions at $\sqrt{s}$= 7 TeV
• Measurement of charged jet cross section in pp collisions at $\sqrt{s}=5.02$ TeV
• Measurement of electrons from heavy-flavour hadron decays as a function of multiplicity in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV

Cited by in corpus (8)

• The ALICE experiment: a journey through QCD
• Properties of the QCD Matter: A Review of Selected Results from the ALICE Experiment
• Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Multi-particle correlations, cumulants, and moments sensitive to fluctuations in rare-probe azimuthal anisotropy in heavy ion collisions
• Bayesian Constraints on Pre-Equilibrium Jet Quenching and Predictions for Oxygen Collisions
• Production of forward heavy-flavour dijets at the LHCb within $k_T$-factorization approach
• Machine learning-based b-jet tagging in $pp$ collisions at $\sqrt{s}=13$ TeV
• Defining the Underlying-Event Activity in the Presence of Heavy-Flavour Processes in Proton-Proton Collisions at LHC Energies