The lastes run of the BM@N experiment conducted at the beginning of 2023 is officially a physics run, the main purpose of which is to obtain certain scientific results declared in the research program of the experiment.
Due to the increased event multiplicity, in comparison with previous experimental runs, the configuration of the inner tracker was appreciably upgraded: detection planes...
With the increasing luminosity of modern accelerators in high energy physics, the problem of fast modelling of elementary particle detectors is becoming increasingly important. One approach to fast detector modelling is generative machine learning models, among them Generative adversarial networks (GANs) offer the fastest sampling.
This paper discusses the application of GANs to fast...
An unexpectedly large double-spin correlation $A_{NN}$ was found at large angles in elastic pp scattering ($θ_{c.m.} = 90^◦$ ) at $\sqrt{s_{NN}} = 3$ GeV and 5 GeV in Ref. [1]. These energies correspond to the thresholds for strangeness and charm production in pp collisions, respectively. The observed strong correlations (cross-section ratio of 4 : 1 for parallel and antiparallel spins of...
Recently the BM@N Collaboration [1] measured the missing momentum and residual nucleus momentum distributions in proton knock-out reactions $^{12}\mbox{C}(p,2pn_s)^{10}\mbox{B}$ and $^{12}\mbox{C}(p,2pp_s)^{10}\mbox{Be}$ in the inverse kinematics with incident $^{12}\mbox{C}$ beam at 48 GeV/c on proton target. Here, "s" stands for an unobserved spectator (or recoil) nucleon. The missing...
Particles produced in noncentral heavy-ion collisions are mostly twisted (vortex). They are created in electromagnetic and strong interactions. Particles emitted in strong interactions are twisted if initial interacting partons are in twisted states and are untwisted in the opposite case. A vorticity of nuclear matter plays an important role for the production of twisted particles.
CALIBRATION METHODS FOR HALF-SECTORS OF THE MPD/NICA ELECTROMAGNETIC CALORIMETER ON COSMIC RAY MUONS
M.Bhattacharjee(1,3), V.M.Baryshnikov(1),P.A.Bakhtin(5),S.A.Bulychjov(2), B.Dabrowska(1,4), G.E.Fomenko(5), Yu.F.Krechetov(1), V.V. Kulikov(2), M.A. Martemianov(2), M.A. Matsyuk(2), A.Yu.Semenov(1), I.A. Tyapkin(1)
1 Joint Institute for Nuclear Research, Dubna, 141980 Russia
2 National...
The detector for adjusting the convergence of beams at the point of interaction of the MPD (Multi-Purpose Detector) installation at the NICA collider (Nuclotron-based Ion Collider fAcility) is discussed. Simulation of the detector operation for Au+Au collisions at √(S_NN )=11 ГэВ is calculated. It is shown that background events from scattering on residual gas give a negligible contribution to...
We discuss a few approaches in energy calibration of Forward Hadron Calorimeters (FHCal) at MPD with cosmic muons. A few types of muon tracks in FHCal modules were considered. The straightforward method is the selection of horizontal muons that are parallel to the longitudinal axis of calorimeter modules. In this case the energy deposition in each longitudinal sections of FHCal module is about...
The Time Over Threshold (TOT) method using a pulse shaper based on the mathematical function of the raised cosine (FPC) is described. FPC has an important property for this method – the formation of a smooth pulse, with the variability of the smoothing coefficient and response time. At the same time, the shape of the FPC pulse does not depend on the input pulse waveform in a given time range....
