Abstract
Brookhaven National Laboratory (BNL) is a multipurpose research center that primarily supported by the U.S. Department of Energy (DOE) Office of Science. BNL operates cutting-edge ...large-scale facilities for studies in physics, chemistry, biology, medicine, applied science, and a wide range of advanced technologies. Relativistic Heavy Ion Collider (RHIC) is a megascience facility at BNL that allows to conduct research in nuclear and particle physics. In these proceedings, we will review the current status and future prospects of the megascience complex RHIC.
The method of correlation femtoscopy makes it possible to estimate the parameters of the particle-emitting region (radius of emission region,
, and correlation strength,
). Measurement of femtoscopic ...radius dependence on transverse momentum of particle pairs,
, is an important tool for studying the dynamics of the emission process. This work is devoted to the study of momentum correlations of identical pions produced in Au
Au collisions at
GeV using the UrQMD (Ultrarelativistic Quantum Molecular Dynamics) model. Three-dimensional femtoscopic analysis was performed as a function of
, rapidity and collision centrality. Physical implications will be discussed.
Monte Carlo generators for relativistic heavy-ion collisions have non-standardize output formats. Thus, data that are simulated by different generators require different processing techniques. To ...resolve this issue, a unified storage format with an interface to read and process data is implemented. Unification should be interpreted as the ability to convert any generator output into discussed format. The presented cross-platform solution, McDst software library, is developed on the object–oriented paradigm using C++ language and CERN ROOT libraries. It is distributed in a form of source code and can be extended by end–user. The structure of the format and use cases for the library are presented.
A software infrastructure for analysis of experimental data in high energy physics is tightly connected with the specifics of the experiment: detector setup, collision system, reconstructed event and ...track information. However the aspects of physics analysis are common for different experiments. This fact suggests the development of a universal (in terms of independence from experiments) software, which may be helpful in a number of research cases. A framework for correlation femtoscopy technique, that could be applicable for any experiment, is presented in this work. A polymorphic behavior of the framework encapsulates the data differences, providing a universal way to manage analyses. C++ language and CERN ROOT libraries are used for implementation.
The spatial and temporal characteristics of particle emitting source produced in particle and/or nuclear collisions can be measured by using two-particle femtoscopic correlations. These correlations ...arise due to quantum statistics, Coulomb and strong final state interactions. In this paper we report on the calculations of like-sign pion femtoscopic correlations produced in p+p, p+Au, d+Au, Au+Au at top RHIC energy using Ultra Relativistic Quantum Molecular Dynamics Model (UrQMD). Three-dimensional correlation functions are constructed using the Bertsch-Pratt parametrization of the two-particle relative momentum. The correlation functions are studied in several transverse mass ranges. The emitting source radii of charged pions, Rout, Rside, Rlong, are obtained from Gaussian fit to the correlation functions and compared to data from the STAR and PHENIX experiments.
The two-particle correlations at low relative momenta (correlation femtoscopy) are sensitive to quantum statistics and allow to measure the space-time picture of the system evolution created in ...lieavy-ion (HI) and particle collisions. The spatio-temporal parameters extracted from HI collisions describe the system at the last moment of the collision evolution - kinetic freeze-out. and provide the essential information about the formation of the quark-gluon plasma. The measurements at many facilities showed the dependencies of the spacial scales from the event multiplicity and particle transverse mass,mT. In this paper we show recent results obtained at RHIC and LHC energies and compare them to the theoretical expectations.
Correlation femtoscopy allows one to estimate the spatial and temporal characteristics of the particle-emitting region formed in the relativistic heavy-ion collisions. Azimuthally-differential ...analysis is used to study shape and orientation of the source. In this work, collisions of isobaric nuclei Ru + Ru and Zr + Zr at
GeV are calculated using the UrQMD (Ultrarelativistic Quantum Molecular Dynamics) model and the azimuthally-differential two-pion femtoscopy relative to the second- and third-order event plane are performed. The extracted characteristics of the emission source are presented as a function of the pair transverse momentum,
, collision centrality and the pair emission angle. In the future, the obtained results can be compared with the STAR experimental data.
The femtoscopy technique allows one to measure the spatial and temporal scales of the particle-emitting source produced in high-energy collisions. In non-central ultra-relativistic heavy-ion ...collisions, emitting source may be tilted in the reaction plane. The orientation of freeze-out distributions is interesting because it provides complementary information about quark-gluon matter properties. In the experiment, the tilt can be extracted by measuring femtoscopic radii as a function of the pair angle with respect to the first-order event plane. In this talk, we will present results of azimuthally sensitive femtoscopic analysis of Au+Au and Cu+Au collisions at sNN=200GeV. We will also present the transverse momentum and multiplicity dependence of identical pion femtoscopic radii from d+Au, 3He+Au collisions at sNN=200GeV. All data was obtained from the UrQMD model.
The main goal of heavy-ion collision measurements at NICA energies (sNN=4−11GeV) is to study the properties of the quark-gluon matter at high baryon densities. Femtoscopy allows one to probe spatial ...and temporal characteristics of the particle-emission process at the last stage of the collision evolution - kinetic freeze-out. In this proceedings, we present estimations of like-sign pion and kaon pair femtoscopic observables for NICA energies using the UrQMD model. The dependence of the femtoscopic radii on collision energy, centrality, and pair transverse momentum are shown.
Heavy-ion collisions provide information about the properties of the matter under extreme conditions. Measurement of strangeness production properties provides important information about the ...collision region evolution. The spatial and temporal characteristics of particle emission can be extracted using femtoscopy technique. The collision energy, centrality, and transverse mass dependence of the three-dimensional charged kaon femtoscopic radii for Au + Au collisions in the Beam Energy Scan program is presented.
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