Measurement of the production of charm jets tagged with D-0 mesons in pp collisions at root s=7 TeV

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The ALICE Collaboration , Acharya , S , Chang , B , Kim , D J , Krizek , F , Mieskolainen , M M , Orava , R , Parkkila , J E , Rak , J , Rytkonen , H , Saarinen , S , Slupecki , M , Snellman , T W , Trzaska , W H , Viinikainen , J & Zhou , Z 2019 , ' Measurement of the production of charm jets tagged with D-0 mesons in pp collisions at root s=7 TeV ' , Journal of High Energy Physics , no. 8 , 133 . https://doi.org/10.1007/JHEP08(2019)133

Title: Measurement of the production of charm jets tagged with D-0 mesons in pp collisions at root s=7 TeV
Author: The ALICE collaboration; Acharya, S.; Chang, B.; Kim, D. J.; Krizek, F.; Mieskolainen, M. M.; Orava, R.; Parkkila, J. E.; Rak, J.; Rytkonen, H.; Saarinen, S.; Slupecki, M.; Snellman, T. W.; Trzaska, W. H.; Viinikainen, J.; Zhou, Z.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, Academy of Sciences of the Czech Republic, Nuclear Physics Institute
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Bergen
Date: 2019-08-23
Language: eng
Number of pages: 34
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
URI: http://hdl.handle.net/10138/310832
Abstract: 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 →K−π+. 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.
Subject: 114 Physical sciences
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