Year: 2024
Type: article
Abstract: We present the first theoretical study on heavy-flavor jet angularities ( λ α κ ) in Pb+Pb collisions at s NN = 5.02 TeV. The initial production of heavy-flavor jets was carried out using the POWHEG+PYTHIA8 prescription. In contrast, the SHELL transport model describes jet evolution in the quark-gluon plasma (QGP). In p+p collisions, we observed narrower angularity distributions for D0-tagged jets than for inclusive jets, consistent with the ALICE preliminary results. We then demonstrate that jet quenching in the QGP slightly widens the angularity distribution of D0-tagged jets in Pb+Pb collisions relative to that in p+p collisions for a jet transverse momentum of 10 < p T , jet ch < 20 GeV/c. In contrast, the angularity distributions of the inclusive and D0-tagged jets become narrower in Pb+Pb collisions relative to p+p at p T , jet ch > 20 GeV/c because of the strong influence of selection bias. Additionally, by comparing the average angularities 〈 λ α κ 〉 of the inclusive, D0-tagged, and B0-tagged jets with varying α and κ, we show that the larger the quark mass, the lower the jet’s 〈 λ α κ 〉 values are. As a result of the slenderer initial distribution, we predict that compared with inclusive jets, heavy-flavor jets, especially B0-tagged ones, will suffer stronger modifications of 〈 λ α κ 〉 in Pb+Pb relative to p+p at 10 < p T , jet ch < 20 GeV/c. For a larger jet radius, a more significant broadening of the jet angularities was predicted because of the enhanced contribution of the wide-angle particles.
Source: Chinese Physics Letters
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G3759592126, 强相互作用物质的硬探针信号研究, G7916857574
OpenAlex ID: W4405646144