Recent results from the NN-interaction studies with polarized beams and targets at ANKE-COSY

Genetic Algorithm for Determination of the Event Collision Time and Particle Identification by Time-of-Flight at NICA SPD

“…The time of the event was calculated in subsamples and the weighted average of the results was then taken. This strategy reduces the computational time but mathematically is not equivalent to the direct minimization of the χ 2 -function (2). The reported results show the high efficiency of the ALICE's mitigation strategy for high-multiplicity events (N > 15), but efficiency decreases towards lower multiplicities, which are typical at SPD running conditions.…”

“…All possible types of particles are represented as a mass-ordered set (genetic representation), e.g., [m π , m K , m p ] → [0, 1,2]. The algorithm maintains a set of candidate solutions called a population.…”

“…By studying collisions of polarized proton and deuteron beams, the SPD Collaboration is going to perform a comprehensive study of the unpolarized and polarized gluon content of nucleons and other spin-related QCD (Quantum Chromodynamics) phenomena [1]. With polarized protonproton (pp) collision energies, √ s, up to 27 GeV, and a luminosity up to 10 32 cm −2 s −1 , SPD is designed to cover a kinematic range between the low-energy measurements at ANKE-COSY [2] and SATURNE [3] experiments and the high-energy measurements at RHIC (Relativistic Heavy Ion Collider, Brookhaven, USA) [4] and the LHC (Large Hadron Collider, Geneva, Switzerland) [5].…”