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We suggest the azimuthal distribution of mean transverse (radial) rapidity of the final state particles as a more direct measure of the transverse motion of the source than the standard azimuthal multiplicity distribution. Using a sample…

核理论 · 物理学 2015-06-11 Lin Li , Na Li , Yuanfang Wu

We consider a possibility of detecting the jitter effect of apparent celestial positions of distant sources due to local fluctuations of the Galaxy gravitational field. It is proposed to observe two samples of extragalactic sources (target…

星系天体物理 · 物理学 2020-07-29 Tatiana I. Larchenkova , Natalia Lyskova , Leonid Petrov , Alexander A. Lutovinov

The distributions of event-by-event harmonic flow coefficients v_n for n=2-4 are measured in sqrt(s_NN)=2.76 TeV Pb+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using charged particles with transverse…

高能物理 - 实验 · 物理学 2013-12-30 ATLAS Collaboration

PHENIX has measured the transverse momentum ($p_{\rm T}$) spectra and two particle angular correlations for high $p_{\rm T}$ particles in $d$+Au collisions at $\sqrt{s_{_{NN}}}$=200\,GeV using the RHIC Year-2008 run data. The azimuthal…

核实验 · 物理学 2019-08-13 Takao Sakaguchi

This short overview includes recent results from the ALICE Collaboration on anisotropic flow of charged and identified particles in sqrt(sNN) = 2.76 TeV Pb-Pb collisions. We also discuss charge dependent and event plane dependent azimuthal…

核实验 · 物理学 2015-06-12 Sergei A. Voloshin

Deep-inelastic ep scattering data, taken with the H1 detector at HERA, are used to study the event shape variables thrust, jet broadening, jet mass, C parameter and two kinds of differential two-jet rate. The data cover a large range of the…

高能物理 - 实验 · 物理学 2008-11-26 H1 Collaboration , C. Adloff

The measurement of charged-particle event shape variables is presented in inclusive inelastic pp collisions at a center-of-mass energy of 7 TeV using the ATLAS detector at the LHC. The observables studied are the transverse thrust, thrust…

高能物理 - 实验 · 物理学 2013-08-09 ATLAS Collaboration

Three-dimensional, as well as one- and two-dimensional, studies of multiplicity fluctuation are performed using AMPT model to generate central Au-Au collision events at ${\sqrt s_{NN}}= 200$ GeV. Two- and three-dimensional normalized…

核理论 · 物理学 2016-01-06 Xie YiLong , Chen Gang , Wang JiangLing , Liu ZhaoHui , Wang MeiJuan

The PHENIX experiment has measured direct photons in $\sqrt{s_{NN}} = 200$ GeV Au+Au collisions and p+p collisions. The fraction of photons due to direct production in Au+Au collisions is shown as a function of $p_T$ and centrality. This…

核实验 · 物理学 2019-08-14 S. Mioduszewski

In the framework of the Glauber approach we analyze the shape parameters of the early-formed system and their event-by-event fluctuations. We test a variety of models: the conventional wounded nucleon model, a model admixing binary…

核理论 · 物理学 2008-11-26 Wojciech Broniowski , Piotr Bozek , Maciej Rybczynski

High $p_T > 10$ GeV elliptic flow, which is experimentally measured via the correlation between soft and hard hadrons, receives competing contributions from event-by-event fluctuations of the low $p_T$ elliptic flow and event plane angle…

核理论 · 物理学 2016-06-29 Jacquelyn Noronha-Hostler , Barbara Betz , Jorge Noronha , Miklos Gyulassy

We perform two-pion Hanbury Brown-Twiss (HBT) interferometry for the partially coherent pion-emitting sources in relativistic heavy-ion collisions, using a multi-phase transport (AMPT) model. A longitudinal coherent emission length, as well…

核理论 · 物理学 2024-02-02 Shi-Yao Wang , Jun-Ting Ye , Wei-Ning Zhang

We discuss various sources of azimuthal correlations in relativistic heavy-ion collisions. The integral measure Phi is applied to quantify the correlations. We first consider separately the correlations caused by the elliptic flow,…

核理论 · 物理学 2015-03-17 Tomasz Cetner , Katarzyna Grebieszkow , Stanislaw Mrowczynski

Azimuthal angle two particle correlations have been shown to be a powerful probe for extracting novel features of the interaction between hard scattered partons and the medium produced in Au+Au collisions at RHIC. At intermediate $p_T$,…

核实验 · 物理学 2019-08-14 Anne Sickles

Particle production and event topology are very strongly correlated in high-energy hadronic and nuclear collisions. Event topology is decided by the underlying particle production dynamics and medium effects. Transverse spherocity is an…

高能物理 - 唯象学 · 物理学 2022-03-11 Suraj Prasad , Neelkamal Mallick , Debadatta Behera , Raghunath Sahoo , Sushanta Tripathy

Recent improvements in the method of estimating Renyi entropies from measurements of coincidences between the events observed in high energy collisions are reviewed. A new, more precise, formulation of the method is presented and its…

高能物理 - 唯象学 · 物理学 2007-05-23 A. Bialas , K. Zalewski

We study an inverse source problem for the acoustic wave equation in a random waveguide. The goal is to estimate the source of waves from measurements of the acoustic pressure at a remote array of sensors. The waveguide effect is due to…

偏微分方程分析 · 数学 2015-02-25 Sebastian Acosta , Ricardo Alonso , Liliana Borcea

We argue that the event-by-event fluctuation of the proton number is a meaningful and promising observable for the purpose of detecting the QCD critical end-point in heavy-ion collision experiments. The long range fluctuation of the order…

高能物理 - 唯象学 · 物理学 2009-11-10 Y. Hatta , M. A. Stephanov

We continue the analysis of the preceding talk with a discussion of the elliptic flow and the HBT pion correlation radii. It is shown that the thermal model can be extended to describe these phenomena. The description of the elliptic flow…

核理论 · 物理学 2009-11-07 Wojciech Broniowski , Anna Baran , Wojciech Florkowski

The measured elliptic flow (v2) of identified particles as a function of pT and centrality at RHIC suggests the created medium in Au+Au collisions achieves early local thermal equilibrium that is followed by hydrodynamic expansion. It is…

核实验 · 物理学 2009-11-11 Erik Johnson