The Study of the Internal Structure of Archaeological Coins from the Fortress of Uzundara Using Neutron Radiography and Tomography

The study of the internal structure of archaeological objects is one of the most important tasks of archeology. Obtaining images of the internal structure of objects allows the installation of neutron tomography. Ancient coins found in the fortress of Uzundara were chosen as objects of study.Исследование проводилось в рамках программы научно-исследовательских работ Института ядерной физики Академии наук Республики Узбекистана на 2020-2024 годы, по теме «Радиационно - стимулированные процессы при ядерной трансмутации легированного монокристаллического кремния» в лаборатории радиационной физики и техники твердотельной электроники

Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR

Substantial experimental and theoretical efforts worldwide are devoted to explore the phase diagram of strongly interacting matter. At LHC and top RHIC energies, QCD matter is studied at very high temperatures and nearly vanishing net-baryon densities. There is evidence that a Quark-Gluon-Plasma (QGP) was created at experiments at RHIC and LHC. The transition from the QGP back to the hadron gas is found to be a smooth cross over. For larger net-baryon densities and lower temperatures, it is expected that the QCD phase diagram exhibits a rich structure, such as a first-order phase transition between hadronic and partonic matter which terminates in a critical point, or exotic phases like quarkyonic matter. The discovery of these landmarks would be a breakthrough in our understanding of the strong interaction and is therefore in the focus of various high-energy heavy-ion research programs. The Compressed Baryonic Matter (CBM) experiment at FAIR will play a unique role in the exploration of the QCD phase diagram in the region of high net-baryon densities, because it is designed to run at unprecedented interaction rates. High-rate operation is the key prerequisite for high-precision measurements of multi-differential observables and of rare diagnostic probes which are sensitive to the dense phase of the nuclear fireball. The goal of the CBM experiment at SIS100 (sqrt(s_NN) = 2.7 - 4.9 GeV) is to discover fundamental properties of QCD matter: the phase structure at large baryon-chemical potentials (mu_B > 500 MeV), effects of chiral symmetry, and the equation-of-state at high density as it is expected to occur in the core of neutron stars. In this article, we review the motivation for and the physics programme of CBM, including activities before the start of data taking in 2022, in the context of the worldwide efforts to explore high-density QCD matter.Comment: 15 pages, 11 figures. Published in European Physical Journal

A study of backward going pp and π−\pi^{-} in νμCC\nu_{\mu}CC interactions with the NOMAD detector

Backward proton and $\pi^-$ production has been studied in $\nu_{\mu}CC$ interactions with carbon nuclei. Detailed analyses of the momentum distributions, of the production rates, and of the general features of events with a backward going particle, have been carried out in order to understand the mechanism producing these particles. The backward proton data have been compared with the predictions of the reinteraction and the short range correlation models.Comment: 29 pages, 14 figures, submitted to Nucl. Phys.

Neutron-Tomographic Study of the Internal Structure of Knife Products Found in the Uzundara Fortress

This thesis examines the internal structure using neutron tomography of two knife products (of different composition), which were found in the Uzundara. From the received infor-mation, the method of their processing when forging an object and internal defects in the material are described

Measurement of the production cross section of a W boson in association with two b jets in pp collisions at root s=8TeV

Peer reviewe

Dependence of inclusive jet production on the anti-k(T) distance parameter in pp collisions at root s=13 TeV

Peer reviewe

Measurement of exclusive rho(770)(0) photoproduction in ultraperipheral pPb collisions at root s(NN)=5.02 TeV

Exclusive.(770) 0 photoproduction is measured for the first time in ultraperipheral pPb collisions at v s NN = 5.02 TeV with the CMS detector. The cross section s(.p..(770) 0 p) is 11.0 +/- 1.4 (stat) +/- 1.0 (syst) mu b at W. p = 92.6GeV for photon-proton centre-of-mass energies W. p between 29 and 213 GeV. The differential cross section ds/d| t| is measured in the interval 0.025 <| t| <1GeV 2 as a function of W. p, where t is the squared four-momentum transfer at the proton vertex. The results are compared with previous measurements and theoretical predictions. The measured cross section s(.p..(770) 0 p) has a power-law dependence on the photon-proton centre-of-mass, consistent with electron-proton collision measurements performed at HERA. The W. p dependence of the exponential slope of the differential cross section ds/d| t| is also measured.Peer reviewe

Strange hadron production in pp and pPb collisions at √s_(NN) = 5.02 TeV

The transverse momentum (p_T) distributions of Λ, Ξ⁻, and Ω⁻ baryons, their antiparticles, and K⁰_S mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 nb⁻¹ and 15.6 μb⁻¹ for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor R_(pPb), which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the p_T range from 2 to 7 GeV, where R_(pPb) for K⁰_S is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from EPOS LHC, which includes parametrized radial flow. The model is in qualitative agreement with the R_(pPb) data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions