%0 Chart or Table
%A ALICE Collaboration
%T Observation of medium-induced yield enhancement and acoplanarity broadening of low-p<sub>T</sub> jets from measurements in pp and central Pb−Pb collisions at √{s<sub>NN</sub>}=5.02 TeV
%M GSI-2025-00256
%D 2024
%Z Journal Article GSI record: GSI-2025-00255
%X The ALICE Collaboration reports measurements of the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum (high p<sub>T</sub>) charged hadron, in pp and central Pb-Pb collisions at center of mass energy per nucleon-nucleon collision √{s<sub>NN</sub>}=5.02 TeV. The large uncorrelated background in central Pb-Pb collisions is corrected using a data-driven statistical approach, which enables precise measurement of recoil jet distributions over a broad range in p<sub>T,ch jet</sub> and jet resolution parameter R. Recoil jet yields are reported for R= 0.2, 0.4, and 0.5 in the range 7 < p<sub>T,ch jet</sub> < 140 GeV/c and π/2 < ∆φ < π, where ∆φ is the azimuthal angular separation between hadron trigger and recoil jet. The low p<sub>T,ch jet</sub> reach of the measurement explores unique phase space for studying jet quenching, the interaction of jets with the quark-gluon plasma generated in high-energy nuclear collisions. Comparison of p<sub>T,ch jet</sub> distributions from pp and central Pb-Pb collisions probes medium-induced jet energy loss and intra-jet broadening, while comparison of their acoplanarity distributions explores in-medium jet scattering and medium response. The measurements are compared to theoretical calculations incorporating jet quenching.
%F PUB:(DE-HGF)32
%9 Dataset
%R 10.17182/HEPDATA.152376
%U https://repository.gsi.de/record/356873