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| Main Author: | |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2403.13921 |
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| _version_ | 1866914722462302208 |
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| author | Pani, Tanmay |
| author_facet | Pani, Tanmay |
| contents | Jets are produced in early stages of heavy-ion collisions and undergo modified showering in the quark-gluon plasma (QGP) medium relative to a vacuum case. These modifications can be measured using observables like jet momentum profile and generalized angularities to study the details of jet-medium interactions. Jet momentum profile ($ρ(r)$) encodes radially differential information about jet broadening and has shown migration of charged energy towards the jet periphery in Pb+Pb collisions at the LHC. Measurements of generalized angularities (girth $g$ and momentum dispersion $p_T^D$) and LeSub (difference between leading and subleading constituents) from Pb+Pb collisions at the LHC show harder, or more quark-like jet fragmentation, in the presence of the medium. Measuring these distributions in heavy-ion collisions at RHIC will help us further characterize the jet-medium interactions in a phase-space region complimentary to that of the LHC. In this contribution, we present the first measurements of fully corrected $g$, $p_T^D$ and LeSub observables using hard-core jets in Au+Au collisions at $\sqrt{s_{\rm NN}}=200$ GeV, collected by the STAR experiment at RHIC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_13921 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Generalized angularities measurements from STAR at $\sqrt{s_{\rm NN}} = $ 200 GeV Pani, Tanmay Nuclear Experiment Jets are produced in early stages of heavy-ion collisions and undergo modified showering in the quark-gluon plasma (QGP) medium relative to a vacuum case. These modifications can be measured using observables like jet momentum profile and generalized angularities to study the details of jet-medium interactions. Jet momentum profile ($ρ(r)$) encodes radially differential information about jet broadening and has shown migration of charged energy towards the jet periphery in Pb+Pb collisions at the LHC. Measurements of generalized angularities (girth $g$ and momentum dispersion $p_T^D$) and LeSub (difference between leading and subleading constituents) from Pb+Pb collisions at the LHC show harder, or more quark-like jet fragmentation, in the presence of the medium. Measuring these distributions in heavy-ion collisions at RHIC will help us further characterize the jet-medium interactions in a phase-space region complimentary to that of the LHC. In this contribution, we present the first measurements of fully corrected $g$, $p_T^D$ and LeSub observables using hard-core jets in Au+Au collisions at $\sqrt{s_{\rm NN}}=200$ GeV, collected by the STAR experiment at RHIC. |
| title | Generalized angularities measurements from STAR at $\sqrt{s_{\rm NN}} = $ 200 GeV |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2403.13921 |