Generative ML models are widely used in the modern world to solve different practical problems. This approach is a very promising solution for various problems in experimental particle and nuclear physics. However, specific requirements of using such models for obtaining quantitative scientific results put restrictions on direct using industrial generative models out of the box.
This...
В настоящее время одним из актуальных направлений применения машинного обучения в физике высоких энергий являются задачи поиска оптимальных конфигураций детектирующих систем. Целью подобной оптимизации является нахождение баланса между способностью всех детекторов бесконфликтно выполнять поставленные задачи и стоимостью постройки, или модернизации установки.
В данной работе рассказывается о...
Компьютерные модели детекторов на коллайдерных экспериментах могут иметь различную степень детальности: начиная от упрощенных Toy-моделей, отражающих основные характеристики физических процессов детектирования и исследуемых физических явлений, заканчивая детальным моделированием, включающего инженерные ограничения и alignment детектора. Последние модели удобны для получения симуляционных...
Estimation of centrality is crucial in any analysis sensitive to initial stages of nucleus-nucleus collisions. In heavy ion collisions experiments typically one can use forward detectors to measure energy of nucleon spectators as a proxy for centrality estimator. Precision of this determination in limited by the detector resolution and losses of particles on a way from an interaction point to...
Reliable particle identification is a crucial component of modern physics experiments. The use of a Focusing multilayer Aerogel Ring Imaging CHerenkov detector FARICH is under intensive discussion for the SPD detector at NICA. The detector may use both seedless real-time signal finder to produce fast trigger and mitigate noise background, and seeded off-line reconstruction mode for precise...
The very high data acquisition rate as 20 GB/sec data flow resulting from a 3 MHz collision frequency is planned in the future SPD NICA experiment. It implies that tracks of several events will be overlapped and recorded in a single time-slice. Thus, after the step of recognizing all tracks in a time-slice, it is necessary to group the recognized tracks by events to determine their vertices....
Forward hadronic calorimetes are used in HI experiments to determine centrality and reaction plane. To understand the response and calculate systematic uncertanties a large amount of simulated data has to be produced. However a GEANT4 simulation of hadronic calorimeters may take as much time as of the whole detector if the calorimeter was hitted by a large fraction of nucleon spectators due to...
The accurate modeling of detector responses in high energy physics experiments is crucial for obtaining reliable physical results.However, nowadays, with the increasing luminosity of modern particle accelerators, the modelling requirements are growing faster than the available computational resources. Therefore, faster methods for modeling of detectors needs to be developed.
In this...
Hyperloop is a new analysis train system, developed and introduced for the data analysis in the ALICE experiment in the conditions of LHC Run 3. It has started a regular operation in early 2022, being available 24/7. Hyperloop, as a successor of the LEGO train system, used for analysis of Run 1 and Run 2 data, provides efficient management of the analysis process and economical usage of the...
In this work, we present the results of series of computational experiments studying the neural network approach to event-by-event estimation of the impact parameter in heavy ion collisions. The configurations of detectors on microchannel plates, were simulated as a source of collision data for the computational algorithm. Originally, such detector systems were proposed in [1]. Computational...
The compact highly granular time-of-flight neutron detector (HGN) is designed for the fixed target BM@N experiment at the NICA facility. This detector is aimed to measure anisotropy of azimuthal neutron flows, that are sensitive to the equation of state for dense nuclear matter. Neutrons are produced in nucleus-nucleus collisions with energies up to several GeV. The main reconstruction...
