Medium modifications of heavy-flavor jet angularities in high-energy nuclear collisions
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913622364520448 |
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| author | Li, Yao Chen, Shi-Yong Kong, Wei-Xi Wang, Sa Zhang, Ben-Wei |
| author_facet | Li, Yao Chen, Shi-Yong Kong, Wei-Xi Wang, Sa Zhang, Ben-Wei |
| contents | We present the first theoretical study of heavy-flavor jet angularities ($λ^κ_α$) in Pb+Pb collisions at $\sqrt{s_{\rm NN}}=$ 5.02 TeV. The initial production of heavy-flavor jets is carried out using the POWHEG+PYTHIA8 prescription, while the jet evolution in the quark-gluon plasma (QGP) is described by the SHELL transport model. In p+p collisions, we observe narrower angularity distributions for D$^0$-tagged jets compared to inclusive jets, consistent with the ALICE preliminary results. We then demonstrate that jet quenching in the QGP slightly widens the angularity distribution of D$^0$-tagged jets in Pb+Pb collisions relative to that in p+p collisions for jet transverse momentum of $10 < p_{\rm T,jet} < 20$ GeV/c, while the angularity distributions of inclusive and D$^0$-tagged jets become narrower in Pb+Pb collisions relative to p+p at $p_{\rm T,jet} > 20$ GeV/c due to the strong influence of the selection bias. Additionally, by comparing the average angularities $\langle λ^κ_α \rangle$ of inclusive, D$^0$-tagged and B$^0$-tagged jets with varying $α$ and $κ$, we show that the larger the quark mass is, the lower the jet's $\langle λ^κ_α \rangle$ values are. As a result of the slenderer initial distribution, we predict that as compared to inclusive jets, the heavy-flavor jets, especially the B$^0$-tagged ones, will suffer stronger modifications of $\langle λ^κ_α \rangle$ in Pb+Pb relative to p+p at $10 < p_{\rm T,jet} < 20$ GeV/c. For a larger jet radius, a more significant broadening of jet angularities is predicted because of the enhanced contributions of the wide-angle particles. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_12742 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Medium modifications of heavy-flavor jet angularities in high-energy nuclear collisions Li, Yao Chen, Shi-Yong Kong, Wei-Xi Wang, Sa Zhang, Ben-Wei High Energy Physics - Phenomenology Nuclear Theory We present the first theoretical study of heavy-flavor jet angularities ($λ^κ_α$) in Pb+Pb collisions at $\sqrt{s_{\rm NN}}=$ 5.02 TeV. The initial production of heavy-flavor jets is carried out using the POWHEG+PYTHIA8 prescription, while the jet evolution in the quark-gluon plasma (QGP) is described by the SHELL transport model. In p+p collisions, we observe narrower angularity distributions for D$^0$-tagged jets compared to inclusive jets, consistent with the ALICE preliminary results. We then demonstrate that jet quenching in the QGP slightly widens the angularity distribution of D$^0$-tagged jets in Pb+Pb collisions relative to that in p+p collisions for jet transverse momentum of $10 < p_{\rm T,jet} < 20$ GeV/c, while the angularity distributions of inclusive and D$^0$-tagged jets become narrower in Pb+Pb collisions relative to p+p at $p_{\rm T,jet} > 20$ GeV/c due to the strong influence of the selection bias. Additionally, by comparing the average angularities $\langle λ^κ_α \rangle$ of inclusive, D$^0$-tagged and B$^0$-tagged jets with varying $α$ and $κ$, we show that the larger the quark mass is, the lower the jet's $\langle λ^κ_α \rangle$ values are. As a result of the slenderer initial distribution, we predict that as compared to inclusive jets, the heavy-flavor jets, especially the B$^0$-tagged ones, will suffer stronger modifications of $\langle λ^κ_α \rangle$ in Pb+Pb relative to p+p at $10 < p_{\rm T,jet} < 20$ GeV/c. For a larger jet radius, a more significant broadening of jet angularities is predicted because of the enhanced contributions of the wide-angle particles. |
| title | Medium modifications of heavy-flavor jet angularities in high-energy nuclear collisions |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2409.12742 |