Investigating charm-quark dynamics in the QGP via the charm-hadron elliptic flow in Pb-Pb collisions with ALICE
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914130088165376 |
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| author | Di Costanzo, Marcello |
| author_facet | Di Costanzo, Marcello |
| contents | In these proceedings, the elliptic flow ($v_{2}$) measurement of prompt and non-prompt charm hadrons - originating respectively from the fragmentation of a charm quark and from the decay of hadrons with beauty-quark content - in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}} = 5.36~\text{TeV}$, using the latest data collected during LHC Run 3 by the ALICE detector, is presented. The analysis is performed at midrapidity ($|y| < 0.8$), and hadronic decay channels are used to reconstruct the signal candidates. The $v_{2}$ coefficient is measured via the Scalar Product (SP) technique. The prompt $v_{2}$ in semicentral collisions is reported for the $D^{0}$, $D^{+}$, $D_{s}^{+}$ mesons and, for the first time, for the $Λ_{c}^{+}$ baryon. These results achieve unprecedented precision and low-$p_{\mathrm{T}}$ reach for the D mesons and highlight the first observation of the splitting of baryon and meson elliptic flow at intermediate $p_{\mathrm{T}}$ in the charm sector. The $v_{2}$ is also measured for prompt $D^{0}$, $D^{+}$ and $D_{s}^{+}$ in peripheral collisions, offering new insights into the features of the fireball generated in ultrarelativistic heavy-ion collisions. Lower $v_{2}$ values are observed for non-prompt $D^{0}$ and $Λ_{c}^{+}$ hadrons in semicentral collisions, as expected from the larger beauty-quark mass. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_00567 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Investigating charm-quark dynamics in the QGP via the charm-hadron elliptic flow in Pb-Pb collisions with ALICE Di Costanzo, Marcello Nuclear Experiment High Energy Physics - Experiment In these proceedings, the elliptic flow ($v_{2}$) measurement of prompt and non-prompt charm hadrons - originating respectively from the fragmentation of a charm quark and from the decay of hadrons with beauty-quark content - in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}} = 5.36~\text{TeV}$, using the latest data collected during LHC Run 3 by the ALICE detector, is presented. The analysis is performed at midrapidity ($|y| < 0.8$), and hadronic decay channels are used to reconstruct the signal candidates. The $v_{2}$ coefficient is measured via the Scalar Product (SP) technique. The prompt $v_{2}$ in semicentral collisions is reported for the $D^{0}$, $D^{+}$, $D_{s}^{+}$ mesons and, for the first time, for the $Λ_{c}^{+}$ baryon. These results achieve unprecedented precision and low-$p_{\mathrm{T}}$ reach for the D mesons and highlight the first observation of the splitting of baryon and meson elliptic flow at intermediate $p_{\mathrm{T}}$ in the charm sector. The $v_{2}$ is also measured for prompt $D^{0}$, $D^{+}$ and $D_{s}^{+}$ in peripheral collisions, offering new insights into the features of the fireball generated in ultrarelativistic heavy-ion collisions. Lower $v_{2}$ values are observed for non-prompt $D^{0}$ and $Λ_{c}^{+}$ hadrons in semicentral collisions, as expected from the larger beauty-quark mass. |
| title | Investigating charm-quark dynamics in the QGP via the charm-hadron elliptic flow in Pb-Pb collisions with ALICE |
| topic | Nuclear Experiment High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2511.00567 |