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

Scientific paper - Original scientific paper

• Author: S. Acharya
• Author: ...
• Author: Tome Antičić; MBZ: 218816
• Author: ...
• Author: Filip Erhardt; MBZ: 345132
• Author: ...
• Author: Sven Gotovac; MBZ: 108173
• Author: ...
• Author: Marko Jerčić; MBZ: 358125
• Author: ...
• Author: Petra Lončar; MBZ: 350591
• Author: ...
• Author: Eugen Mudnić; MBZ: 248856
• Author: ...
• Author: Mirko Planinić; MBZ: 213776
• Author: ...
• Author: Nikola Poljak; MBZ: 283732
• Author: ...
• Author: Antonija Utrobičić; MBZ: 342963
• Author: ...
• Author: Linda Vicković; MBZ: 242565
• Author: ...
• Author: N. Zurlo
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

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 pchT, jet<3, 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, pchT, jet<5, 15> GeV/c and pchT, jet<15, 30> GeV/c in the intervals zch||<0.2, 1.0> and zch||<0.4, 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.

• Keywords (english): jet: charm; jet: transverse momentum; pp: scattering; jet: momentum; D: hadronic decay; charged particle: tracks; parton: showers; higher-order: 1; PYTHIA; quantum chromodynamics; underlying event; CERN LHC Coll; hadronization; fragmentation; rapidity; HERWIG; ALICE; experimental results; 7000 GeV-cms/nucleon
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Journal of High Energy Physics
• Numbering: vol. 2019, no. 8, 133
• p-ISSN: 1126-6708
• e-ISSN: 1029-8479
• DOI: https://doi.org/10.1007/jhep08(2019)133
• URN:NBN: urn:nbn:hr:217:376771
• Publication: 2019
• Document URL: https://link.springer.com/article/10.1007/JHEP08(2019)133
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright CERN,for the benefit of the ALICE Collaboration. Article funded by SCOAP3. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Received: May 13, 2019. Accepted: July 25, 2019. Published: August 23, 2019.
• Created on: 2020-08-19 10:03:06