Fri·Mar 22, 2024Friday·March 22, 2024

1. 01*

   Generalized angularities measurements from STAR at $\sqrt{s_{\mathrm{NN}}}=$ 200 GeV

   Tanmay Pani🇺🇸

   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 ($\rho (r)$) 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 $\sqrt{s_{\mathrm{NN}}}=200$ GeV, collected by the STAR experiment at RHIC.

   nucl-exEPJ Web Conf.(2024)·17 citations
2. 02*

   Generalized angularities and differential jet shapes measurements from STAR at $\sqrt{s}=$ 200 GeV

   Tanmay Pani🇺🇸

   Jets from early stages of heavy-ion collisions undergo modified showering in quark-gluon plasma (QGP) relative to vacuum due to jet-medium interactions, which can be measured using observables like differential jet shape and generalized angularities. Differential jet shape ($\rho (\mathbf{R})$) encodes radially differential information about jet broadening and has shown an average migration of charged energy away from the axes of quenched jets from Pb+Pb collisions at the LHC. Measurements of generalized angularities in presence of the medium from Pb+Pb collisions at the LHC show harder, or more quark-like jet fragmentation relative to vacuum. Measuring these distributions in heavy-ion collisions at RHIC will help us further characterize jet-medium interactions in a phase-space region complementary to that of the LHC. In these proceedings, we present the first fully corrected measurements of $\rho (\mathbf{R})$, jet girth (g), momentum dispersion ($p_T^D$) and momentum difference of leading and subleading constituent particles (LeSub) observables, using hard-core jets in $p$+$p$ collisions at $\sqrt{s}=200$ GeV, collected by the STAR experiment. Finally, the data are compared with model calculations and the physics implications are discussed.

   nucl-exPoS(2024)·0 citations
3. 03*

   Two-particle Bose-Einstein correlations and their Levy parameters in PbPb collisions at 5.02 TeV

   Mate Csanad (for the CMS Collaboration)🇭🇺

   In these proceedings we discuss the measurement of Bose-Einstein momentum correlation function of pairs of charged hadrons in PbPb collisions at 5.02 TeV. We describe the measured correlations with correlation functions derived from Levy type source distributions. Using a transverse momentum and centrality binning, we extract the correlation strength parameter lambda, Levy index alpha and Levy scale parameter R as a function of pair transverse mass mT, for various centralities.

   nucl-exNuovo Cim.C(2025)·1 citation
4. 04*

   Exploring the Big Bang with femtoscopy

   Mate Csanad🇭🇺

   Exploring the fundamental constituents of the matter around us and in the Universe, as well as their interactions, is among the premier goals of physics. Investigating ultrarelativistic collisions in particle accelerators has delivered answers to these questions many times in the past decades. In this paper we focus on the research aimed at recreating the matter that filled the Universe in the first microsecond after the Big Bang -- but this time in collisions of heavy ions. In particular we discuss the technique called femtoscopy, which provides us a tool to understand the space-time structure of particle creation in heavy-ion collisions. We utilize Levy-stable distributions to investigate this structure and explore its dependence on particle momentum and collision energy.

   ↳ nucl-thnucl-exEur.Rev.(2024)·0 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.