Научная группа: MPD Collaboration
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Status and initial physics performance studies of the MPD experiment at NICA
(2022) Abgaryan, V.; Acevedo Kado, R.; Afanasyev, S. V.; Alpatov, E.; Atkin, E.; Barbashina, N.; Blaschke, D.; Demanov, A.; Golosov, O.; Idrisov, D.; Kashirin, E.; Khyzhniak, E.; Luong, V. B.; Nigmatkulov, G.; Parfenov, P.; Samsonov, V.; Selyuzhenkov, I.; Strikhanov, M.; Taranenko, A.; Стриханов, Михаил Николаевич; Деманов, Александр Евгеньевич; Идрисов, Дим Маратович; Голосов, Олег Владимирович; Парфенов, Петр Евгеньевич; Тараненко, Аркадий Владимирович; Нигматкулов, Григорий Александрович; Алпатов, Егор Вячеславович; Аткин, Эдуард Викторович; Барбашина, Наталья Сергеевна
The Nuclotron-based Ion Collider fAcility (NICA) is under construction at the Joint Institute for Nuclear Research (JINR), with commissioning of the facility expected in late 2022. The Multi-Purpose Detector (MPD) has been designed to operate at NICA and its components are currently in production. The detector is expected to be ready for data taking with the first beams from NICA. This document provides an overview of the landscape of the investigation of the QCD phase diagram in the region of maximum baryonic density, where NICA and MPD will be able to provide significant and unique input. It also provides a detailed description of the MPD set-up, including its various subsystems as well as its support and computing infrastructures. Selected performance studies for particular physics measurements at MPD are presented and discussed in the context of existing data and theoretical expectations. © 2022, The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.
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Amplitude parameters of modules for hadron calorimeter at MPD/NICA
(2020) Ivashkin, A.; Golubeva, M.; Guber, F.; Karpushkin, N.; Morozov, S.
The Forward Hadron Calorimeter (FHCal) is a modular lead-scintillator compensating calorimeter and consists of two identical parts placed at the left/right sides from the beam collision point. FHCal design is optimized for the measurements of the energy and space distributions of the projectile nuclei fragments (spectators) in the energy range of 1-5 GeV. The main task of such measurements is the determination of the centrality and the reaction plane orientation in heavy-ion collisions. In addition, FHCal will be used for the centrality trigger, especially to select the most peripheral collisions with the minimum energy deposition in calorimeter. As low as possible the energy threshold for FHCal is required for such a trigger. High light yield is requested to detect the protons and neutrons with low energies and to arrange the efficient centrality trigger.
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Production and reconstruction of short-lived resonances in heavy-ion collisions at NICA energies using the MPD detector
(2021) Riabov, V.; Рябов, Виктор Германович
The short-lived resonances have been used to study properties of the heavy-ion collisions at SPS, RHIC and the LHC. The resonance yields measured in the hadronic decay channels are affected by the rescattering and regeneration effects in the late hadronic phase. The mesonic and baryonic resonances with different strangeness content are used to study the strangeness enhancement phenomenon predicted as one of the signatures for the QCD phase transition. Having different masses and baryonic numbers, the resonances contribute to the study of hadronization mechanisms at low and intermediate transverse momenta. The extensive resonance measurements are not experimentally available in heavy-ion collisions at NICA energies. In this contribution, we study the resonance properties and their sensitivity to different stages of Au+Au collisions at root S-NN = 4-11 GeV. Results of feasibility studies for reconstruction of rho(770)(0), K*(892), phi(1020), Lambda(1520), Sigma(1385)+/- and Xi(1530)degrees resonances in the MPD detector at NICA are presented and discussed.
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Study of Production Features, Modeling and Optimization of Algorithms for Reconstruction of Short-Lived Hadron Resonances in the MPD Experimental Setup at the NICA Collider
(2021) Ivanishchev, D.; Kotov, D.; Malaev, M.; Ryabov, Y.; Riabov, V.; Рябов, Виктор Германович
© 2021, Pleiades Publishing, Ltd.Abstract: We review the predicted properties of short-lived resonances produced in heavy-ion collisions at NICA energies and discuss their sensitivity to strangeness production, the hadronization mechanisms, rescattering and regeneration effects in the hadronic phase of nucleus-nucleus collisions. Results of feasibility studies for the reconstruction of resonances in the MPD experimental setup are also presented and discussed.
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Thermal Photon and Neutral Meson Measurements Using the Photon Conversion Method in the MPD Experiment at the NICA Collider
(2021) Kryshen, E.; Ivanishchev, D.; Kotov, D.; Malaev, M.; Riabov, V.; Рябов, Виктор Германович
© 2021, Pleiades Publishing, Ltd.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 transition into the deconfined state of quarks and gluons, known as quark-gluon plasma. Direct photon measurements in heavy-ion collisions at the future NICA collider may help to estimate the effective temperature of the produced medium and trace the transition from the quark-gluon plasma to the hadron gas state at lower energies. Measurements of neutral meson spectra and extraction of the corresponding decay photon distributions is essential for direct photon studies. In this contribution, we present feasibility studies on the neutral meson and thermal photon measurements in Au–Au collisions using the photon conversion method in the MPD experiment at NICA.
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
Описание
Научная программа мегасайенс эксперимента MPD включает в себя создание в лабораторных условиях на земле новых состояний материи и исследование свойств фазового перехода при экстремально высоких значениях барионной плотности. В природе подобная материя образуется лишь в слияниях нейтронных звёзд или в результате взрыва сверхновых. Важно отметить, что ускорительный комплекс NICA с многоцелевым детектором MPD — самый крупный для современной России проект в области физики высоких энергий.