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We present a semi-analytic approach to forward-backward multiplicity correlations in ultra-relativistic nuclear collisions, based on particle emission from strings with fluctuating end-points. We show that with the constraints from rapidity…

核理论 · 物理学 2019-07-24 Wojciech Broniowski , Martin Rohrmoser

With A Multi-Phase Transport (AMPT) model we investigate the relation between the magnitude, fluctuations and correlations of the initial state spatial anisotropy $\varepsilon_{n}$ and the final state anisotropic flow coefficients $v_{n}$…

核实验 · 物理学 2016-03-23 You Zhou , Kai Xiao , Zhao Feng , Feng Liu , Raimond Snellings

We present first measurements of the pseudorapidity and azimuth $(\eta,\phi)$ bin-size dependence of event-wise mean transverse momentum $<p_{t} >$ fluctuations for Au-Au collisions at $\sqrt{s_{NN}} = 200$ GeV. We invert that dependence to…

核实验 · 物理学 2009-06-25 STAR Collaboration , J. Adams

We present an analysis of proton number fluctuations in $\sqrt{s_{NN}}$ = 2.4 GeV Au+Au collisions measured with the High-Acceptance DiElectron Spectrometer (HADES) at GSI. With the help of extensive detector simulations done with IQMD…

核实验 · 物理学 2020-09-01 J. Adamczewski-Musch , O. Arnold , C. Behnke , A. Belounnas , A. Belyaev , J. C. Berger-Chen , J. Biernat , A. Blanco , C. Blume , M. B"ohmer , P. Bordalo , S. Chernenko , L. Chlad , C. Deveaux , J. Dreyer , A. Dybczak , E. Epple , L. Fabbietti , O. Fateev , P. Filip , P. Fonte , C. Franco , J. Friese , I. Fr"ohlich , T. Galatyuk , J. A. Garzon , R. Gernh"auser , M. Golubeva , R. Greifenhagen , F. Guber , M. Gumberidze , S. Harabasz , T. Heinz , T. Hennino , S. Hlavac , C. H"ohne , R. Holzmann , A. Ierusalimov , A. Ivashkin , B. K"ampfer , T. Karavicheva , B. Kardan , I. Koenig , W. Koenig , M. Kohls , B. W. Kolb , G. Korcyl , G. Kornakov , F. Kornas , R. Kotte , A. Kugler , T. Kunz , A. Kurepin , A. Kurilkin , P. Kurilkin , V. Ladygin , R. Lalik , K. Lapidus , A. Lebedev , L. Lopes , M. Lorenz , T. Mahmoud , L. Maier , A. Mangiarotti , J. Markert , T. Matulewicz , S. Maurus , V. Metag , J. Michel , D. M. Mihaylov , S. Morozov , C. M"untz , R. M"unzer , L. Naumann , K. Nowakowski , M. Palka , Y. Parpottas , V. Pechenov , O. Pechenova , O. Petukhov , K. Piasecki , J. Pietraszko , W. Przygoda , S. Ramos , B. Ramstein , A. Reshetin , P. Rodriguez-Ramos , P. Rosier , A. Rost , A. Rustamov , A. Sadovsky , P. Salabura , T. Scheib , H. Schuldes , E. Schwab , F. Scozzi , F. Seck , P. Sellheim , I. Selyuzhenkov , J. Siebenson , L. Silva , Yu. G. Sobolev , S. Spataro , S. Spies , H. Str"obele , J. Stroth , P. Strzempek , C. Sturm , O. Svoboda , M. Szala , P. Tlusty , M. Traxler , H. Tsertos , E. Usenko , V. Wagner , C. Wendisch , M. G. Wiebusch , J. Wirth , Y. Zanevsky , P. Zumbruch

We present preliminary results of Non-Photonic Electron (NPE) production, NPE-hadron azimuthal correlation as well as NPE elliptic flow studies at midrapidity using a data set with high statistics and low photon conversion background from…

核实验 · 物理学 2019-08-21 Wenqin Xu

We show that the simultaneous measurement of yields and fluctuations is capable of falsifying and constraining the statistical hadronization model. We show how such a measurement can test for chemical non-equilibrium, and distinguish…

核理论 · 物理学 2016-09-08 Giorgio Torrieri , Sangyong Jeon , Johann Rafelski

At energies of a few GeV per nucleon, nuclear collisions exhibit phenomena more complex than the individualistic nucleon interactions observed at much higher energies. From recent results on proton number fluctuations in Au + Au collisions…

核理论 · 物理学 2024-08-16 Ali Bazgir , Maciej Rybczynski , Uzair A. Shah , Zbigniew Wlodarczyk

We present the results for the measurement of $\phi$ meson production in $\sqrt{s_{NN}}$ = 200 GeV Au+Au and pp collisions at the Relativistic Heavy Ion Collider (RHIC). Using the event mixing technique, spectra and yields are obtained from…

核实验 · 物理学 2007-05-23 Jingguo Ma

We present results on strange and multi-strange particle production in Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV as measured with the STAR detector at RHIC. Mid-rapidity transverse momentum spectra and integrated yields of $K^{0}_{S}$,…

核实验 · 物理学 2011-02-21 The STAR Collaboration , M. M. Aggarwal

Event-by-event fluctuations of the mean transverse momentum (mean-$p_T$) provide a sensitive probe of collective dynamics beyond single-particle spectra and anisotropic flow. We present a systematic study of mean-$p_T$ fluctuation…

核理论 · 物理学 2026-02-04 Lipei Du

We present preliminary results from the study of dynamical net-charge fluctuations measured in Au+Au collisions at $\sqrt{s_{NN}}$ = 39 GeV to 7.7 GeV and compare with the published results at higher collision energies. We also present the…

核实验 · 物理学 2015-12-02 Bhanu Sharma

Recent data from RHIC suggest novel nuclear effects in the production of high $p_T$ hadrons. We present results from the STAR detector on high $p_T$ angular correlations in Au+Au and p+p collisions at $\sqrt{s}=200$ GeV/c. These…

核实验 · 物理学 2019-08-14 D. Hardtke

The STAR collaboration at RHIC reports measurements of the inclusive yield of non-photonic electrons, which arise dominantly from semi-leptonic decays of heavy flavor mesons, over a broad range of transverse momenta ($1.2 < \pt < 10$ \gevc)…

核实验 · 物理学 2019-08-14 B. I. Abelev

We investigate the elliptic flow ($v_2$) in Au+Au collisions at $\sqrt{s_{\text{NN}}} = 3.0$ and 4.5 GeV using both hadronic and partonic transport models, including JAM, SMASH, AMPT-Hadronic Cascade, and AMPT-String Melting. At 3.0 GeV,…

核理论 · 物理学 2025-12-24 Li-Ke Liu , Shusu Shi

In this proceedings we present STAR measurements of two particle azimuthal correlations between trigger particles at mid-rapidity ($|\eta|<$ 1) and associated particles at forward rapidities (2.7 $<|\eta|<$ 3.9) in p+p, d+Au and Au+Au…

核实验 · 物理学 2008-11-26 Levente Molnar

We report measurements for the balance function, transverse momentum fluctuations, and net charge fluctuations from Au+Au collisions at 20, 130, and 200 GeV as well as p+p and d+Au collisions at 200 GeV using STAR at RHIC. For Au+Au…

核实验 · 物理学 2009-11-10 Gary D. Westfall

The study of correlations between opposite-sign charge pairs and particle-ratio fluctuations can provide a powerful tool to probe the properties of the quark-gluon plasma (QGP). It has been suggested that the existence of a QCD phase…

核实验 · 物理学 2013-04-09 Hui Wang

Elliptic flow results are presented for Au + Au collisions at $\sqrt{s_{NN}} = 130$ GeV in RHIC. This signal is investigated as a function of transverse momentum, rapidity and centrality. Results from four-particle correlation analysis,…

高能物理 - 实验 · 物理学 2016-08-31 A. H. Tang , STAR Collaboration

Inclusive spectra of charged particles at midrapidity in Au+Au collisions at sqrt(s_NN) = 130 GeV and 200 GeV were measured with the STAR detector at RHIC. The measured mean transverse momentum shows a characteristic dependence on charged…

核实验 · 物理学 2019-08-14 T. S. Ullrich

We use the string melting version of a multi-phase transport (AMPT) model to study Cu+Au collisions at $\sqrt{s_{NN}}=200$ GeV. The rapidity distributions of identified hadrons show asymmetric dependences on rapidity. In addition, elliptic…

高能物理 - 唯象学 · 物理学 2020-05-20 Yuncun He , Zi-Wei Lin