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We present STAR measurements of various harmonics of three-particle correlations in $\sqrt{s_{NN}}=200$ GeV Au+Au collisions at RHIC. The quantity $\langle\cos(m\phi_1+n\phi_2-(m+n)\phi_3)\rangle$ is measured for inclusive charged particles…

Nuclear Experiment · Physics 2019-08-13 Prithwish Tribedy

While the existence of a strongly interacting state of matter, known as 'quark-gluon plasma' (QGP), has been established in heavy ion collision experiments in the past decade, the task remains to map out the transition from the hadronic…

Nuclear Theory · Physics 2013-06-04 Jussi Auvinen , Hannah Petersen

The event-to-event fluctuations of hadron multiplicities are studied for a quark system undergoing second-order phase transition to hadrons. Emphasis is placed on the search for an observable signature that is realistic for heavy-ion…

Nuclear Theory · Physics 2009-11-07 Rudolph C. Hwa , Qing-hui Zhang

The elliptic azimuthal anisotropy coefficient ($v_{2}$) of the identified particles at midrapidity ($|\eta|<0.8$) was investigated in p--Pb collisions at $\sqrt{s_\mathrm{NN}}=$ 5.02 TeV using a multi-phase transport model (AMPT). The…

High Energy Physics - Phenomenology · Physics 2024-04-01 Siyu Tang , Liang Zheng , Xiaoming Zhang , Renzhuo Wan

We present the first full (3+1)D dynamical simulations of ultra-peripheral Pb+Pb collisions at the Large Hadron Collider. Extrapolating from p+Pb collisions, we explore whether a quasi-real photon $\gamma^*$ interacting with the lead…

Nuclear Theory · Physics 2022-12-28 Wenbin Zhao , Chun Shen , Björn Schenke

We use a hydrodynamical model to describe the evolution of the collision system at collision energies sqrt{s}=130 and 200 GeV. At lower sqrt{s}=130 GeV energy we compare the results obtained assuming fast or slow thermalization…

Nuclear Theory · Physics 2009-11-07 P. Huovinen

We investigate several fluctuation effects in high-energy hadronic and nuclear collisions through the analysis of different observables. To introduce fluctuations in the initial stage of collisions, we use the Interacting Gluon Model (IGM)…

High Energy Physics - Phenomenology · Physics 2016-09-06 Y. Hama , T. Kodama , Samya Paiva

The azimuthal collimation of di-hadrons with large rapidity separations in high multiplicity p+p collisions at the LHC is described in the Color Glass Condensate (CGC) effective theory [1] by N_c^2 suppressed multi-ladder QCD diagrams that…

High Energy Physics - Phenomenology · Physics 2013-05-30 Kevin Dusling , Raju Venugopalan

This work presents a Bayesian inference study for relativistic heavy-ion collisions in the Beam Energy Scan program at the Relativistic Heavy-Ion Collider. The theoretical model simulates event-by-event (3+1)D collision dynamics using…

Nuclear Theory · Physics 2026-02-03 Syed Afrid Jahan , Hendrik Roch , Chun Shen

We report the observation of partonic radial collectivity in Au+Au collisions at $\sqrt{s_{\rm NN}} = 200$~GeV via the $p_{\rm T}$-differential flow observable $v_{0}(p_{\rm T})$ using the \texttt{AMPT} String Melting model. For inclusive…

Nuclear Experiment · Physics 2026-02-25 Rohit Agarwala , Dipankar Basak , Kalyan Dey

Starting from a Color Glass Condensate (CGC) framework, based on a running-coupling improved $k_T$-factorized formula, we calculate bulk observables in several heavy-ion collision systems. This is done in two ways: first we calculate the…

Nuclear Theory · Physics 2019-08-07 Andre V. Giannini , Frédérique Grassi , Matthew Luzum

It is shown that the recently developed hybrid code VISHNU, which couples a relativistic viscous fluid dynamical description of the quark-gluon plasma (QGP) with a microscopic Boltzmann cascade for the late hadronic rescattering stage,…

Nuclear Theory · Physics 2011-06-21 Huichao Song , Steffen A Bass , Ulrich W Heinz , Tetsufumi Hirano , Chun Shen

The striking resemblance of high multiplicity proton-proton (pp) collisions at the LHC to heavy ion collisions challenges our conventional wisdom on the formation of the Quark-Gluon Plasma (QGP). A consistent explanation of the collectivity…

High Energy Physics - Phenomenology · Physics 2021-08-30 Liang Zheng , Guang-Hui Zhang , Yun-Fan Liu , Zi-Wei Lin , Qi-Ye Shou , Zhong-Bao Yin

Recent observations of ridge-like structure in $p$-$p$ and $p$-$A$ angular correlations at the RHIC and LHC have been interpreted to imply collective motion in smaller collision systems. It is argued that if correlation structures accepted…

High Energy Physics - Phenomenology · Physics 2016-07-20 Thomas A. Trainor

Long-range multi-particle correlations in heavy-ion collisions have shown conclusive evidence of the hydrodynamic behavior of strongly interacting matter and are associated with the final-state azimuthal momentum anisotropy. In small…

Nuclear Theory · Physics 2025-06-17 Aswathy Menon K R , Suraj Prasad , Neelkamal Mallick , Raghunath Sahoo

In this proceedings contribution, we review 3+1d quasiparticle anisotropic hydrodynamics (aHydroQP). Then, we show some recent phenomenological comparisons between the aHydroQP model and some experimental results. We show comparisons…

High Energy Physics - Phenomenology · Physics 2019-02-20 Mubarak Alqahtani , Dekrayat Almaalol , Mohammad Nopoush , Radoslaw Ryblewski , Michael Strickland

The observation of multi-particle azimuthal correlations in high-energy small-system collisions has led to intense debate on its origin and the possible coexistence from two competing theoretical scenarios: one based on initial-state…

Nuclear Experiment · Physics 2020-02-26 Shengli Huang , Zhenyu Chen , Jiangyong Jia , Wei Li

The heavy-ion collisions (A--A) at the Large Hadron Collider (LHC) energies have confirmed the production of the quark-gluon plasma (QGP), a new state of nuclear matter where quarks and gluons are deconfined. The light-flavour hadrons…

Nuclear Experiment · Physics 2023-11-06 Rajendra Nath Patra

The presence of correlations between particles significantly separated in pseudorapidity in proton-proton and proton-nucleus collisions revealed surprises in the early LHC data. Are the physical processes responsible for the observed…

Nuclear Experiment · Physics 2021-09-21 Georgios Konstantinos Krintiras

A comprehensive Bayesian analysis of the 3D dynamics of high-energy nuclear collisions is presented. We perform a systematic model-to-data comparison using simulations of large and small collision systems, and a broad range of measurements…