The K*(892)0 and Φ(1020) mesons are copiously produced in hadronic and heavy-ion collisions and carry a wealth of information on different aspects of the interactions, including the properties of the ...hadronic phase, relative interplay of the radial flow and coalescence at intermediate momentum. For these reasons, measurements of K*(892)0 and Φ(1020) production is an important part of the experimental program of the MPD experiment at NICA. We discuss prospects for K*(892)0 and Φ(1020) measurements in the MPD experimental setup as well as results of the feasibility studies performed using the full-scale Monte Carlo simulations of the detector response.
Abstract
Thermal photons serve as valuable probes of the hot and dense medium produced in heavy ion collisions. The effective thermal photon temperature measured at RHIC and LHC energies far exceeds ...the temperature predicted for the phase space transition into the deconfined state of quarks and gluons, known as quark-gluon plasma (QGP). Direct photon measurements in heavy ion collisions at the future NICA collider may help to estimate the effective temperature of the produced medium at lower energies and trace the transition from QGP to the hadron gas state. In this contribution, we present feasibility studies on the thermal photon measurements in AuAu collisions using the photon conversion method in the MPD experiment at NICA.
The MPD experiment is aimed to study strongly interacting matter in nucleus-nucleus collisions at the future NICA collider in the energy range 4-11 GeV per nucleon pair. Neutral pion and η ...measurements via two-photon decays will allow the MPD experiment to extend the variety of registered particle species and will provide important information on dynamics and properties of the medium created in heavy ion collisions at NICA energies. The measurement of neutral pion and η meson spectra is also important as a first step towards the analysis of thermal photons sensitive to the temperature of the produced medium. In this contribution, the feasibility of neutral meson production measurements in the two-photon channel via photon conversions will be presented, and implications for the study of thermal photons will be discussed.
Initial results are presented from studying the possibility of measuring different resonances on the experimental setup of the MPD spectrometer of the NICA accelerator, along with the first ...assessments of the impact the hadron phase has on the properties of resonances in heavy ion collisions at NICA energies.
It has long been believed that small colliding systems (
p
+Au,
d
+Au,
3
He + Au) are can only be used to study the collective effects of cold nuclear matter. However, recent studies on the RHIC and ...LHC accelerators indicate there are flowlike collective effects characterized by the high multiplicity of charged particles produced in these collisions. Whether these effects result from the hydrodynamic expansion of a dense and hot thermalized medium or are caused by the initial state remains an open question. This work reports the results from measuring flow characteristics in
d
+ Au and
3
He + Au collisions at an energy of 200 GeV in the PHENIX experiment on the RHIC collider. Attempts to describe the results theoretically are discussed.
An asymmetric system of colliding copper and gold nuclei (Cu + Au) has a specific overlap geometry when compared to symmetric systems (Au + Au, Cu + Cu). Studying asymmetric heavy systems allows us ...to obtain additional restrictions for existing models and more accurate descriptions of the processes of parton energy loss in hot and dense QCD matter produced in collisions of heavy nuclei. This work reports nuclear modification factors for neutral pions in Cu + Au, Сu + Cu, and Au + Au collisions at an energy of 200 GeV, measured in the PHENIX experiment on the RHIC.
The Compressed Baryonic Matter (CBM) experiment is a dedicated heavy ion collision experiment at the FAIR facility. It will be one of the first HEP experiments which works in a triggerless mode: data ...received in the DAQ
from the detectors will not be associated with events by a hardware trigger anymore. All raw data within a giventime period will be collected continuously in containers, so-called time-slices. The task of the reconstruction algorithms is to create events out of this raw data stream. In this contribution, the optimization of the reconstruction software in the RICH detector to the free-streaming data flow is presented. The implementation of ring reconstruction algorithms which use time measurements of the hits as an additional parameter is discussed.
The short-lived resonances have proved to be very useful in the study of heavy-ion collisions at SPS, RHIC, and the LHC. Properties of these particles measured in dominant hadronic decay channels ...carry a wealth of information about the hadron chemistry and reaction dynamics. Resonances containing one or two strange quarks contribute to the study of the strangeness enhancement phenomenon predicted as a signature of the phase transition to quark-gluon plasma in heavy-ion collisions. Resonance integrated and differential yields are sensitive to the hadron re-scattering and regeneration in the hadronic phase. The resonance production has only scarcely been studied in heavy-ion collisions at NICA energies. These proceedings are devoted to the review of the expected properties of the resonances and their sensitivity to different stages of Au+Au collisions at sNN= 11 GeV. Results of feasibility studies for reconstruction of ρ(770)0, K*(892)0, ϕ(1020) and Λ(1520) resonances in the MPD experimental setup as a function of collision energy and centrality are presented.
The future MPD experiment at the NICA collider is aimed to study hot and dense matter created in heavy-ion collisions at center-of-mass energies of 4 to 11 GeV. Measurements of photon spectra via ...reconstruction of electron–positron pairs from photon conversions provide a unique opportunity to probe the temperature of the produced medium and study π
0
- and
-meson yields down to low transverse momenta. In this work, feasibility of photon conversion measurements in the MPD experiment is discussed. A proposal to increase the photon conversion probability using a dedicated retractable converter is presented, and prospects for probing the material budget of the experiment using converted photons are evaluated.
Collisions between asymmetric nuclei (Cu–Au) differ significantly in their nuclear overlap geometry from those of symmetric nuclei (Cu–Cu, Au–Au). This results in a number of consequences that allow ...us to obtain more comprehensive and accurate information about the fundamental properties of matter under extreme conditions. The High Energy Proton–Proton Collider Experiment (PHENIX) at the Relativistic Heavy Ion Collider (RHIC) measured the nuclear modification factors of π-mesons in Cu+Au collisions at an energy of 200 GeV. New experimental data from measurements of light hadron flows of different orders (ν
1
, ν
2
) in Cu + Au collisions at an energy of 200 GeV are discussed.
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