Measurement of the production of charm jets tagged with D0 mesons in pp collisions at √s = 7 TeV

ALICE Collaboration

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The production of charm jets in proton–proton collisions at a center-of-mass energy of √s = 7 TeV was measured with the ALICE detector at the CERN Large Hadron Collider. The measurement is based on a data sample corresponding to a total integrated luminosity of 6.23 nb−1, collected using a minimum-bias trigger. Charm jets are identified by the presence of a D0 meson among their constituents. The D0 mesons are reconstructed from their hadronic decay D0 →Kπ+. The D0-meson tagged jets are reconstructed using tracks of charged particles (track-based jets) with the anti-kT algorithm in the jet transverse momentum range 5 < pchT,jet < 30 GeV/c and pseudorapidity |ηjet| < 0.5. The fraction of charged jets containing a D0-meson increases with pchT,jet from 0.042± 0.004(stat)±0.006(syst) to 0.080±0.009(stat)±0.008(syst). The distribution of D0-meson tagged jets as a function of the jet momentum fraction carried by the D0 meson in the direction of the jet axis (zch|| ) is reported for two ranges of jet transverse momenta, 5 < pchT,jet < 15 GeV/c and 15 < pchT,jet < 30 GeV/c in the intervals 0.2 < zch|| < 1.0 and 0.4 < zch|| < 1.0, respectively. The data are compared with results from Monte Carlo event generators (PYTHIA 6, PYTHIA 8 and Herwig 7) and with a Next-to-Leading-Order perturbative Quantum Chromodynamics calculation, obtained with the POWHEG method and interfaced with PYTHIA 6 for the generation of the parton shower, fragmentation, hadronisation and underlying event.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - May 7 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

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