scholarly journals Reconstruction of Photon Conversions in the MPD Experiment

Particles ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 55-62
Author(s):  
Evgeny Kryshen ◽  
Dmitry Ivanishchev ◽  
Dmitry Kotov ◽  
Mikhail Malaev ◽  
Victor Riabov ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Feasibility Studies ◽  
Heavy Ion ◽  
Dense Medium ◽  
Thermal Photon ◽  
Ion Collisions ◽  
Electron Positron ◽  
The Future ◽  
Photon Conversion ◽  
Detector Material

Spectra of thermal photons carry important information on the temperature of the hot and dense medium produced in heavy ion collisions. Photons can be measured via their conversion into electron-positron pairs in the detector material. In this contribution, challenges in the photon reconstruction are discussed and feasibility studies on photon conversion measurements in the future multipurpose detector (MPD) experiment at NICA are presented. The obtained results indicate good prospects for thermal photon measurements.

scholarly journals Properties of ρ(770)0, K*(892), ϕ(1020), ∑(1385)±, Λ(1520) and Ξ(1530)0 resonances in heavy-ion collisions at a center of mass energy of SNN=4-11GeV and their reconstruction using the MPD detector at NICA

2021 ◽  
Vol 2103 (1) ◽  
pp. 012140
Author(s):  
D A Ivanishchev ◽  
D O Kotov ◽  
E L Kryshen ◽  
M V Malaev ◽  
V G Riabov ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Center Of Mass ◽  
Feasibility Studies ◽  
Heavy Ion ◽  
Hadronic Decay ◽  
Relativistic Heavy Ion Collisions ◽  
Dense Medium ◽  
Center Of Mass Energy ◽  
Ion Collisions ◽  
Physical Program

Abstract The short-lived hadronic resonances are used to study properties of the hot and dense medium produced in relativistic heavy-ion collisions. Due to their short lifetimes, the resonance yields and masses measured in the hadronic channels are sensitive to rescattering and regeneration effects in the hadronic phase. The measurement of resonances is foreseen in the physical program of the MPD experiment at NICA in heavy-ion collisions at S N N = 4 - 11 GeV , in the range of energies where extensive measurements of resonances are not experimentally available. In this contribution, we explore the sensitivity of the ρ(770)0, K*(892), ϕ(1020), ∑(1385)±, Λ(1520) and Ξ(1530)0 resonances measured in the hadronic decay channels to different stages of the heavy-ion collisions at NICA energies and report the feasibility studies for the reconstruction of resonances in the MPD setup

scholarly journals Highlights from PHENIX at RHIC

2018 ◽  
Vol 171 ◽  
pp. 01003
Author(s):  
Rachid Nouicer
Keyword(s):  
Heavy Quark ◽  
Heavy Ion Collisions ◽  
Meson Production ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Dense Medium ◽  
Heavy Flavor ◽  
Theoretical Understanding ◽  
Rapidity Region ◽  
Ion Collisions

Hadrons conveying strange quarks or heavy quarks are essential probes of the hot and dense medium created in relativistic heavy-ion collisions. With hidden strangeness, ϕ meson production and its transport in the nuclear medium have attracted high interest since its discovery. Heavy quark-antiquark pairs, like charmonium and bottomonium mesons, are mainly produced in initial hard scattering processes of partons. While some of the produced pairs form bound quarkonia, the vast majority hadronize into particles carrying open heavy flavor. In this context, the PHENIX collaboration carries out a comprehensive physics program which studies the ϕ meson production, and heavy flavor production in relativistic heavy-ion collisions at RHIC. In recent years, the PHENIX experiment upgraded the detector in installing silicon vertex tracker (VTX) at mid-rapidity region and forward silicon vertex tracker (FVTX) at the forward rapidity region. With these new upgrades, the experiment has collected large data samples, and enhanced the capability of heavy flavor measurements via precision tracking. This paper summarizes the latest PHENIX results concerning ϕ meson, open and closed charm and beauty heavy quark production in relativistic heavy-ion collisions. These results are presented as a function of rapidity, energy and system size, and their interpretation with respect to the current theoretical understanding.

Nonperturbative character of electron-positron pair production in relativistic heavy-ion collisions

1991 ◽  
Vol 66 (20) ◽  
pp. 2613-2616 ◽  
Author(s):  
Klaus Rumrich ◽  
Klaus Momberger ◽  
Gerhard Soff ◽  
Walter Greiner ◽  
Norbert Grün ◽  
...  
Keyword(s):  
Pair Production ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Electron Positron ◽  
Electron Positron Pair

scholarly journals Heavy flavour production at RHIC and LHC

2018 ◽  
Vol 171 ◽  
pp. 04001 ◽  
Author(s):  
Gian Michele Innocenti
Keyword(s):  
Energy Loss ◽  
Quark Matter ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Experimental Results ◽  
Relativistic Heavy Ion Collisions ◽  
Dense Medium ◽  
Medium Energy ◽  
Ion Collisions ◽  
Flavour Physics

In this proceedings, I present selected experimental results on heavy-flavour production at RHIC and at the LHC, which were presented at the Strangeness in Quark Matter 2017 conference. I will present a brief introduction to the heavy-flavour physics in heavy ion collisions and I will focus on recents measurements of in-medium energy loss and and collective properties of heavy-flavour particles, which provided important information on the mechanisms of heavy flavour interaction with the hot and dense medium created in ultra-relativistic heavy-ion collisions.

scholarly journals Perspectives of thermal photon measurements in heavy ion collisions at NICA

2019 ◽  
Vol 222 ◽  
pp. 02006
Author(s):  
Evgeny Kryshen ◽  
Dmitry Ivanishchev ◽  
Dmitry Kotov ◽  
Mikhail Malaev ◽  
Victor Riabov ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Tracking System ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Hadronic Matter ◽  
Optimal Method ◽  
Thermal Photon ◽  
Ion Collisions ◽  
Physics Program ◽  
Photon Spectra

The main goal of the future NICA-MPD experiment is studying the dense baryonic matter produced in heavy-ion collisions in the energy range 4-11 GeV and searching for signs of the phase transition between hadronic matter and deconfined quark-gluon plasma. Measurements of soft thermal photon yields and collective flow can significantly extend the physics program of the MPD experiment, allowing one to probe the temperature and the level of thermalizaion of the medium created in heavy ion collisions at NICA energies. The optimal method to measure soft photons is to register photon conversions in the material of the tracking system. In this contribution, recent RHIC and LHC results on thermal photon spectra and flow will be presented. Motivation and feasibility of thermal photon measurements with the conversion method in the projected MPD setup will be discussed.

scholarly journals Measurement of the neutral and charged K* (892) mesons in the MPD experiment at NICA

2019 ◽  
Vol 222 ◽  
pp. 02005
Author(s):  
Dmitry Ivanishchev ◽  
Dmitry Kotov ◽  
Evgeny Kryshen ◽  
Mikhail Malaev ◽  
Victor Riabov ◽  
...  
Keyword(s):  
Heavy Ion Collisions ◽  
Meson Production ◽  
Feasibility Studies ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Experimental Setup ◽  
Parton Energy Loss ◽  
Ion Collisions ◽  
Systematic Uncertainties ◽  
Charged Pions

Measurements of K*(892) meson production provide the means to study properties of relativistic heavy-ion collisions. Because of their short lifetimes, the charged and neutral K*(892) mesons provide information about the properties of the late hadronic phase due to the presence of rescattering and regeneration effects that can modify resonance yields. The K*(892) mesons can also be used to study the various mechanisms that shape particle transverse momentum (pT) spectra, including the collective flow, in-medium parton energy loss and recombination. Measurement of neutral K*(892) mesons requires reconstruction of the charged pions and kaons originating from the primary vertex. At the same time, the measurement of charged K*(892) mesons involves reconstruction of the weakly decaying Ks mesons. Simultaneous measurement of the two particles is a way to minimize systematic uncertainties of the corresponding physical studies. We present results of feasibility studies for measurement of the charged and neutral K*(892) mesons in the MPD experimental setup in heavy-ion collisions at NICA energies. Results are obtained using full-scale Monte Carlo simulations of the experimental setup.

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