Measurement of jet quenching with semi- inclusive hadron-jet distributions in central Pb-Pb collisions at √s =2.76 TeV

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

doi:10.1007/JHEP09(2015)170

Pregled bibliografske jedinice broj: 801404

Measurement of jet quenching with semi- inclusive hadron-jet distributions in central Pb-Pb collisions at √s =2.76 TeV

Adam, J.; ...; Antičić, Tome; ...; Erhardt, Filip; ...; Gotovac, Sven; ...; Mudnić, Eugen; ... et al.

Measurement of jet quenching with semi- inclusive hadron-jet distributions in central Pb-Pb collisions at √s =2.76 TeV // The Journal of high energy physics, 1509 (2015), 9; 170-1 doi:10.1007/JHEP09(2015)170 (međunarodna recenzija, članak, znanstveni)

CROSBI ID: 801404 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Measurement of jet quenching with semi- inclusive hadron-jet distributions in central Pb-Pb collisions at √s =2.76 TeV

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

Izvornik
The Journal of high energy physics (1126-6708) 1509 (2015), 9; 170-1

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

Ključne riječi
jet quenching ; hadron-jet distributions ; central Pb-Pb ; 2.76 TeV

Sažetak
We report the measurement of a new observable of jet quenching in central Pb-Pb collisions at sNN−−−√=2.76 TeV, based on the semi-inclusive rate of charged jets recoiling from a high transverse momentum (high-pT) charged hadron trigger. Jets are measured using collinear-safe jet reconstruction with infrared cutoff for jet constituents of 0.15 GeV/c, for jet resolution parameters R=0.2, 0.4 and 0.5. Underlying event background is corrected at the event-ensemble level, without imposing bias on the jet population. Recoil jet spectra are reported in the range 20<pchT, jet<100 GeV/c. Reference distributions for pp collisions at s√=2.76 TeV are calculated using Monte Carlo and NLO pQCD methods, which are validated by comparing with measurements in pp collisions at s√=7 TeV. The recoil jet yield in central Pb-Pb collisions is found to be suppressed relative to that in pp collisions. No significant medium-induced broadening of the intra-jet energy profile is observed within 0.5 radians relative to the recoil jet axis. The angular distribution of the recoil jet yield relative to the trigger axis is found to be similar in central Pb-Pb and pp collisions, with no significant medium- induced acoplanarity observed. Large-angle jet deflection, which may provide a direct probe of the nature of the quasi-particles in hot QCD matter, is explored.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
ALICE collaboration.

POVEZANOST RADA

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

Profili:

Filip Erhardt (autor)