Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV

Adam, J.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Mudnić, Eugen; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Simatović, Goran; ...; Utrobičić, Antonija; ...; Vicković, Linda; ...; Zmeskal, J.

doi:10.1016/j.physletb.2016.10.048

Pregled bibliografske jedinice broj: 860700

Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV

(ALICE Collaboration) Adam, J.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Mudnić, Eugen; ... et al.

Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV // Physics letters. B, 763 (2016), 238-250 doi:10.1016/j.physletb.2016.10.048 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 860700 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Jet-like correlations with neutral pion triggers in pp and central Pb–Pb collisions at 2.76 TeV

Autori
Adam, J. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zmeskal, J.

Kolaboracija
ALICE Collaboration

Izvornik
Physics letters. B (0370-2693) 763 (2016); 238-250

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

Ključne riječi
neutral pion ; lead-lead ; correlation

Sažetak
We present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta 8 < pT < 16 GeV/c and associated charged particles of 0.5 < pT < 10 GeV/c versus the azimuthal angle difference Δφ at midrapidity in pp and central Pb–Pb collisions at √sNN = 2.76 TeV with ALICE. The new measurements exploit associated charged hadrons down to 0.5 GeV/c, which significantly extends our previous measurement that only used charged hadrons above 3 GeV/c. After subtracting the contributions of the flow background, v2 to v5, the per-trigger yields are extracted for |Δφ|<0.7 on the near and for | Δφ−π|<1.1 on the away side. The ratio of per- trigger yields in Pb–Pb to those in pp collisions, IAA, is measured on the near and away side for the 0–10% most central Pb–Pb collisions. On the away side, the per-trigger yields in Pb–Pb are strongly suppressed to the level of IAA≈0.6 for pT(assoc) > 3 GeV/c, while with decreasing momenta an enhancement develops reaching about 5 at low pT(assoc). On the near side, an enhancement of IAA between 1.2 at the highest to 1.8 at the lowest pT(assoc) is observed. The data are compared to parton-energy- loss predictions of the JEWEL and AMPT event generators, as well as to a perturbative QCD calculation with medium- modified fragmentation functions. All calculations qualitatively describe the away-side suppression at high pT(assoc). Only AMPT captures the enhancement at low pT(assoc), both on the near and away side. However, it also underpredicts IAA above 5 GeV/c, in particular on the near-side.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA

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

Profili:

Filip Erhardt (autor)