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HK: Fachverband Physik der Hadronen und Kerne
HK 57: Heavy-Ion Collisions and QCD Phases IX
HK 57.2: Talk
Thursday, March 13, 2025, 18:00–18:15, HS 3 Chemie
Semi-inclusive hadron-jet momentum distributions using mixed events with ALICE — •Nicola Wilson for the ALICE Germany collaboration — Physikalisches Institut, Ruprecht-Karls-Universitaet Heidelberg, Germany
The ALICE experiment at CERN studies the Quark Gluon Plasma (QGP), a state of matter formed at extreme temperatures/densities with partonic degrees of freedom produced in heavy-ion collisions. Jets, generated in the initial hard scatterings, are valuable for probing QGP properties. As they transverse the QGP, their energy and structure are modified by medium interactions.
This work focuses on jets recoiling from high pT trigger hadrons (h-jets) in central PbPb collisions at
√s = 5.02 TeV, with different pTtrig intervals analyzed. Jet measurements are challenging due to the large uncorrelated background, particularly at low pT. To address this, a novel mixed-event technique is applied, where artificial events with uncorrelated tracks are constructed from real events.
Jet reconstruction is performed using the anti-kT algorithm with varying jet radii for both real and mixed events. The mixed event jet pT distribution is used to correct the background yield in real event jet spectra. Finally, unfolding procedures correct detector and background effects.
We present first results of hadron triggered recoil jet transverse momentum spectra using the mixed-event technique.
Keywords: Jets; Mixed Events; ALICE