Szczegóły publikacji
Opis bibliograficzny
Measurement of jet radial profiles in $Pb–Pb$ collisions at $\sqrt{s_{NN}}=2.76$ TeV / S. Acharya, [et al.], P. J. Konopka, [et al.] // Physics Letters. B ; ISSN 0370-2693. — 2019 — vol. 796, s. 204–219. — Bibliogr. s. 213–214, Abstr. — Publikacja dostępna online od: 2019-07-12. — P. Konopka – afiliacja: European Organization for Nuclear Research (CERN), Geneva, Switzerland
Autorzy (1022)
- Acharya Shreyasi
- Konopka Piotr
Dane bibliometryczne
| ID BaDAP | 133008 |
|---|---|
| Data dodania do BaDAP | 2021-03-15 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.physletb.2019.07.020 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physics Letters, B |
Abstract
The jet radial structure and particle transverse momentum (p(T)) composition within jets are presented in centrality-selected Pb-Pb collisions at root s(NN) = 2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R = 0.3 at midrapidity vertical bar eta(chjet)vertical bar < 0.6 for transverse momenta P-T,P- (ch jet) = 30-120 GeV/c. Jet-hadron correlations in relative azimuth and pseudorapidity space (Delta phi/Delta eta) are measured to study the distribution of the associated particles around the jet axis for different p(T, assoc)-ranges between 1 and 20 GeV/c. The data in Pb-Pb collisions are compared to reference distributions for pp collisions, obtained using embedded PYTHIA simulations. The number of high-p(T) associate particles (4 < p(T,assoc) < 20 GeV/c) in Pb-Pb collisions is found to be suppressed compared to the reference by 30 to 10%, depending on centrality. The radial particle distribution relative to the jet axis shows a moderate modification in Pb-Pb collisions with respect to PYTHIA. High-p(T) associate particles are slightly more collimated in Pb-Pb collisions compared to the reference, while low-p(T) associate particles tend to be broadened. The results, which are presented for the first time down to p(T, chjet) = 30 GeV/c in Pb-Pb collisions, are compatible with both previous jet-hadron-related measurements from the CMS Collaboration and jet shape measurements from the ALICE Collaboration at higher p(T), and add further support for the established picture of in-medium parton energy loss.