Measurement of jet radial profiles in Pb–Pb collisions at √sNN=2.76 TeV

Acharya, S.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ...; Lončar, Petra; ...; Mudnić, Eugen; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Utrobičić, Antonija; ...; Vicković, Linda; ...; Zurlo, N.

doi:10.1016/j.physletb.2019.07.020

Pregled bibliografske jedinice broj: 1024880

Measurement of jet radial profiles in Pb–Pb collisions at √sNN=2.76 TeV

(ALICE Collaboration) Acharya, S.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Jerčić, Marko; ... et al.

Measurement of jet radial profiles in Pb–Pb collisions at √sNN=2.76 TeV // Physics letters. B, 796 (2019), 204-219 doi:10.1016/j.physletb.2019.07.020 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 1024880 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Measurement of jet radial profiles in Pb–Pb collisions at √sNN=2.76 TeV

Autori
Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Physics letters. B (0370-2693) 796 (2019); 204-219

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
parton: energy loss ; hadron: correlation ; heavy ion: scattering ; transverse momentum ; PYTHIA ; suppression ; collimator ; resolution ; rapidity ; ALICE ; experimental results ; 2760 GeV-cms/nucleon

Sažetak
The jet radial structure and particle transverse momentum (pT) composition within jets are presented in centrality-selected Pb–Pb collisions at √sNN=2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R=0.3 at midrapidity |ηch jet|<0.6 for transverse momenta pT, ch jet=30 –120 GeV/ c . Jet–hadron correlations in relative azimuth and pseudorapidity space ( Δφ, Δη ) are measured to study the distribution of the associated particles around the jet axis for different pT, 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- pT associate particles (pT, assoc<4, 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- pT associate particles are slightly more collimated in Pb–Pb collisions compared to the reference, while low- pT associate particles tend to be broadened. The results, which are presented for the first time down to pT, ch jet=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 pT , and add further support for the established picture of in- medium parton energy loss.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA

Projekti:
HRZZ-IP-2018-01-4108 - Demistificiranje dvočestičnih korelacija u pp sudarima s nadograđenom komorom vremenske projekcije (TPCwithTPC) (Planinić, Mirko, HRZZ - 2018-01) ( CroRIS)

Ustanove:
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Profili:

Filip Erhardt (autor)