Measurement of the fraction of jet longitudinal momentum carried by Λ c+ baryons in pp collisions

Scientific paper - Original scientific paper

• Author: S. Acharya
• Author: ...
• Author: Filip Erhardt
• Author: ...
• Author: Sven Gotovac
• Author: ...
• Author: Marko Jerčić
• Author: ...
• Author: David Karatović
• Author: ...
• Author: Petra Lončar
• Author: ...
• Author: Mirko Planinić
• Author: ...
• Author: Nikola Poljak
• Author: ...
• Author: Linda Vicković
• Author: ...
• Author: N. Zurlo
• Collaboration: ALICE Collaboration
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Recent measurements of charm-baryon production in hadronic collisions have questioned the universality of charm-quark fragmentation across different collision systems. In this work the fragmenta tion of charm quarks into charm baryons is probed, by presenting the first measurement of the longitudinal jet momentum fraction carried by Λþ c baryons, zch k , in hadronic collisions. The results are obtained in proton-proton (pp) collisions at ffiffi s p ¼ 13 TeV at the LHC, with Λþ c baryons and charged (track-based) jets reconstructed in the transverse momentum intervals of 3 ≤ pΛþ c T < 15 GeV=c and 7 ≤ pjet ch T < 15 GeV=c, respectively. The zch k distribution is compared to a measurement of D0-tagged charged jets in pp collisions as well as to PYTHIA 8 simulations. The data hints that the fragmentation of charm quarks into charm baryons is softer with respect to charm mesons, in the measured kinematic interval, as predicted by hadronization models which include color correlations beyond leading-color in the string formation.

• Keywords (english): jet longitudinal momentum; pp collisions
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review D
• Numbering: vol. 109, no. 7, 072005
• p-ISSN: 2470-0010
• e-ISSN: 2470-0029
• DOI: https://doi.org/10.1103/PhysRevD.109.072005
• URN:NBN: urn:nbn:hr:217:634413
• Publication: 2024
• Document URL: https://link.aps.org/doi/10.1103/PhysRevD.109.072005
• Type of resource: Text
• Access conditions: Open access
• Public note: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by CERN. Received 18 February 2023; revised 25 August 2023; accepted 16 February 2024; published 5 April 2024.
• Created on: 2024-09-20 08:56:23