Directional dead-cone effect in QCD matter
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909959275413504 |
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| author | Barata, João Kuzmin, Matvey V. López, Xoán Mayo Sadofyev, Andrey V. Salgado, Carlos A. |
| author_facet | Barata, João Kuzmin, Matvey V. López, Xoán Mayo Sadofyev, Andrey V. Salgado, Carlos A. |
| contents | We consider the propagation of heavy quarks through a dense, hydrodynamically flowing QCD medium, representative of the quark-gluon plasma formed in ultrarelativistic heavy-ion collisions. Working in the high-energy limit, we identify two novel mass-dependent effects arising from the heavy quark coupling to the local medium flow. The first is the emergence of a tensorial jet transport coefficient, $\hat{q}_{ij}$, which encodes the directional structure of transverse-momentum broadening. The second, named the directional dead-cone effect, corresponds to an anisotropic suppression of medium-induced radiation aligned with the hydrodynamic flow. We discuss how these effects manifest in jet observables and identify distinctive signature of heavy quark dynamics in an evolving medium. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_11951 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Directional dead-cone effect in QCD matter Barata, João Kuzmin, Matvey V. López, Xoán Mayo Sadofyev, Andrey V. Salgado, Carlos A. High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory We consider the propagation of heavy quarks through a dense, hydrodynamically flowing QCD medium, representative of the quark-gluon plasma formed in ultrarelativistic heavy-ion collisions. Working in the high-energy limit, we identify two novel mass-dependent effects arising from the heavy quark coupling to the local medium flow. The first is the emergence of a tensorial jet transport coefficient, $\hat{q}_{ij}$, which encodes the directional structure of transverse-momentum broadening. The second, named the directional dead-cone effect, corresponds to an anisotropic suppression of medium-induced radiation aligned with the hydrodynamic flow. We discuss how these effects manifest in jet observables and identify distinctive signature of heavy quark dynamics in an evolving medium. |
| title | Directional dead-cone effect in QCD matter |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2512.11951 |