CERN Accelerating science

If you experience any problem watching the video, click the download button below
Download Embed
Preprint
Report number arXiv:2411.10104 ; CERN-EP-2024-302
Title Studying charm hadronisation into baryons with azimuthal correlations of Λc+ with charged particles in pp collisions at s = 13 TeV
Author(s) Acharya, Shreyasi (Clermont-Ferrand U.) ; Agarwal, Apar (Calcutta, VECC) ; Aglieri Rinella, Gianluca (CERN) ; Aglietta, Luca (Turin U. ; INFN, Turin) ; Agnello, Michelangelo (Turin Polytechnic) ; Agrawal, Neelima (Bologna U. ; INFN, Bologna) ; Ahammed, Zubayer (Calcutta, VECC) ; Ahmad, Shakeel (Aligarh Muslim U.) ; Ahn, Sang Un (KISTI, Daejeon) ; Ahuja, Ishaan (Kosice U.) Показване на всичките 1070 автора
Corporate author(s) The ALICE collaboration
Publication 2024
Imprint 12 Nov 2024
Number of pages 28
Note 28 pages, 6 captioned figures, 1 table, authors from page 22, submitted to PLB, figures at http://alice-publications.web.cern.ch/node/11748
Subject category Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ALICE
Keywords QCD ; relativistic heavy ion physics ; hard scattering ; heavy quark production ; particle correlations and fluctuations ; experimental results
Abstract The distribution of angular correlations between prompt charm hadrons and primary charged particles in pp collisions is sensitive to the charm-quark hadronisation process. In this letter, charm-baryon correlations are measured for the first time by studying the azimuthal-angle difference between charged particles and prompt Λc+ baryons produced in pp collisions at a centre-of-mass energy s=13 TeV, with the ALICE detector. Λc+ baryons are reconstructed at midrapidity (|y|<0.5) in the transverse-momentum interval 3<pT<16 GeV/c, and correlated with charged particles with pT>0.3 GeV/c and pseudorapidity |η|<0.8. For 3<pTΛc+,D<5 GeV/c, the comparison with published measurements of D-meson and charged-particle correlations in the same collision system hints at a larger number of low-momentum particles associated with Λc+-baryon triggers when with D-meson triggers, both in the collinear and opposite directions with respect to the trigger particle. These differences can be quantified by the comparison of the properties of the near- and away-side correlation peaks, and are not reproduced by predictions of various Monte Carlo event generators, generally underpredicting the associated particle yields at pTassoc<1 GeV/c. This tension between Λc+-baryon and D-meson associated peak yields could suggest a modified fragmentation of the charm quark, or a different hadronisation process, when a charm baryon is produced in the final state.
Other source Inspire
Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Submitted by zaida.conesa.del.valle@cern.ch



 


 Записът е създаден на 2024-11-12, последна промяна на 2025-01-04


  • Send to ScienceWise.info