Search academic texts

Information × Registration Number 0222U000251, 0121U112548 , R & D reports Title Solid-state fixed target mode at the LHCb experiment (CERN) and search for extreme states of matter in heavy-ion collisions at the Large Hadron Collider popup.stage_title Head Puhach Valerii M., Доктор фізико-математичних наук Registration Date 05-01-2022 Organization Institute of Nuclear Research of the National Academy of Sciences of Ukraine popup.description2 The RMS-R3 system for beam and background monitoring in the LHCb experiment, developed and manufactured in the INR, NAS of Ukraine, has been commissioned. The system has been successfully tested in the LHCb experiment during the LHC pilot beams run. The RMS-R3 system is a prototype element for controlling the position of micro-targets in the halo of the LHC beam to ensure a stable rate of nucleus interactions between the LHC beam and the target nuclei. The prototype design of the LHCb-MEMS linear target, controlled by a piezocrystal MEMS and stepper motor, has been completed. A request for an experiment was prepared as well as a request for beam time in 2022 was submitted to experimentally test and study the technique of accurate positioning and monitoring of charge/flux from a prototype solid-state target based on the MEMS technology on the test beamline of protons at SPS/PS (CERN). The analysis of physical data on the generation of neutral strange hadrons in p-Pb and Pb-p collisions at energy √s = 8.16 TeV in the LHCb experiment was performed. The differential cross-sections of KS0 and Λ0 generation in two collision configurations as a function of the transverse momentum and the multiplicity parameters at the same time are calculated as well as their ratio. There is an increase in the yield of KS0 mesons and Λ0 baryons with their antiparticles for larger transverse momentums, i.e. the spectrum becomes harder with increasing multiplicity for cross-sections in both absolute and normalized values. The obtained new experimental data are the basis for the development and selection of reliable theoretical models that predict the regularities in the collisions of relativistic heavy nuclei due to the effects of cold nuclear matter and/or the formation of quark-gluon plasma. Product Description popup.authors Dobishuk Vasyl M Koliiev Serhii M Kot Olexander A Chernyshenko Serhii B popup.nrat_date 2022-03-09 Close