[en] Recent precision measurements of diffractive neutral current deep inelastic ep scattering are performed by the H1 and ZEUS collaborations at the HERA collider in a wide range of photon virtually Q². The first measurements of the large rapidity gap cross sections in charged current (CC) processes at high Q² are also presented. The large rapidity gap (LRG) cross-sections and their ratios to the inclusive CC cross section measured by H1 and ZEUS in the range Q² > 200 GeV², y < 0.9 and x < 0.05 are the following. For ZEUS: (0.49 ± 0.20(st) ± 0.13(sys)) pb, (2.9 ± 1.2(st) ± 0.8(sys))%; for H1: (0.42 ± 0.13(st) ± 0.009(sys)) pb, (2.5 ± 0.8(st) ± 0.6(sys))%. The results from the 2 experiments are in good agreement

[en] BM@N (Baryonic Matter at Nuclotron) is the first experiment to be realized at the NICA-Nuclotron accelerator complex. The aim of the BM@N experiment is to study relativistic heavy ion beam interactions with fixed targets. The BM@N setup, results of Monte Carlo simulations, and the BM@N experimental program are presented.

[en] The project NICA (Nuclotron-based Ion Collider fAcility) is aimed to study hot and dense baryonic matter in heavy ion collisions in the energy range up to √sNN=11 GeV at the Nuclotron extracted beams and at the NICA collider with average luminosity of L = 10"2"7 cm"-"2s"-"1 (for "1"9"7Au"7"9). This study will be performed with two experiments, BM@N (Baryonic Matter at Nuclotron) and MPD (MultiPurpose Detector) at the NICA collider. (paper)

[en] Heavy strange objects (hyperons and hypernuclei) could provide essential signatures of the excited and compressed baryonic matter. Their reconstruction and identification should be one of the most important tasks of any experiment with heavy ions. At NICA, it is planned to study hyperons both in the collider mode (MPD detector) and the fixed- target one (BM@N setup). The results on Λ, Ξ"– hyperon and "3_ΛH hypernuclei reconstruction in Monte Carlo simulated event samples of gold-gold collisions with the BM@N detector are presented. (paper)

[en] BM@N (Baryonic Matter at Nuclotron) is the first experiment to be realized at the NICA-Nuclotron accelerator complex at JINR (Dubna). The aim of the experiment is to study interactions of relativistic heavy ion beams with a kinetic energy from 1 to 4.5A GeV with fixed targets. The BM@N set-up at the starting phase of the experiment is introduced. First results of the analysis of minimum bias experimental data collected in the technical run in interactions of the 4A GeV deuteron beam with different targets are presented. The spatial, momentum and primary vertex resolutions of the GEM tracker are studied. The signal of Lambda hyperon is reconstructed in the proton-pion invariant mass spectrum. The data results are described by Monte Carlo simulations.

[en] Design of central tracker system based on Double-Sided Silicon Detectors (DSSD) for BM@N experiment is described. A coordinate plane with 10240 measuring channels, pitch adapter, reading electronics was developed. Each element was tested and assembled into a coordinate plane. The first tests of the plane with "1"0"6Ru source were carried out before installation for the BM@N experiment. The results of the study indicate that noisy channels and inefficient channels are less than 3%. In general, single clusters 87% (one group per module of consecutive strips) and 75% of clusters with a width equal to one strip.

[en] BM@N (Baryonic Matter at the Nuclotron) is a fixed target experiment aimed to study nuclear matter in the relativistic heavy-ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors mounted inside the BM@N analyzing magnet. The Cathode Strip Chamber (CSC) is installed outside the magnet. The CSC is used for improvement of particles momentum identification. The structure of the GEM detectors and the CSC prototype and the results of study of their characteristics are presented. The GEM detectors and CSC are integrated into the BM@N experimental setup and data acquisition system. The results of first tests of the GEM tracking system and CSC in last runs are shortly reviewed.

[en] BM@N experiment (Baryonic Matter at Nuclotron) is aimed to study core-core (up to gold-gold) collisions in extreme conditions. High intensity of interactions and large multiplicity of charged particles in each event cause special requirements to detectors: high spatial and time resolution, stable operation at loadings up to 10⁶ cm⁻². As soon as triple GEM (Gas Electron Multipliers) possess all abovementioned characteristics, they were chosen as the main track detector. In the paper the construction of the BM@N GEM detectors is described and the study of their characteristics is presented.

[en] Recently developed new forward lead/scintillator sampling hadron calorimeters with transverse and longitudinal segmentation will be used in the upgraded BM@N (Baryonic Matter at Nuclotron) experiment at the Nuclotron-NICA acceleration complex in JINR (Dubna). These calorimeters are very important for measurements of centrality and the reaction plane orientation in heavy-ion collisions. Digitizing the analog signals in a wide dynamic range with sampling ADC leads to the fluctuations of the measured charge. The procedure of signal processing based on the Prony least squares fit method has been developed to improve the response requiring minimum machine time. In addition, fitting the signals with a known function allows one to select effectively weak signals at the level of electronics noise, that is important for performing a calibration of calorimeter sections with cosmic muons for the BM@N experiment. The same procedure will be used for hadron calorimeter in CBM experiment at FAIR. New methods of signal processing and cosmic muon tracking for forward hadron calorimeters will be presented.

[en] New forward hadron calorimeter with transverse and longitudinal segmentation has been developed and constructed for the upgraded fixed target BM@N experiment at JINR, Dubna. The main purpose of this calorimeter is to provide event-by-event centrality and reaction plane orientation measurements in nucleus-nucleus collisions. The design of the hadron calorimeter composed of sampling lead/scintillator modules with a beam hole in the center is discussed. The light collection from longitudinal sections in modules is provided by Wave Length Shifting (WLS) fibers embedded in scintillator plates. Micro-pixel photodetectors (Hamamatsu MPPCs) are used for light detection from each longitudinal section of modules. The measured light yield is about 50 photoelectrons per section for MIPs. Sampling ADCs are used for signal readout in the calorimeter. The performance of the FHCAL is discussed. For centrality measurement additional forward quartz hodoscope is developed to measure charge of fragments in the FHCAL beam hole. The method of collision centrality determination is discussed.