Physics of Particles and Nuclei Letters最新文献

We investigate the IV characteristics and magnetization dynamics of the ({{varphi }_{0}}) Josephson junction under an external electromagnetic radiation. A new region of nonlinearety related to the beating near the ferromagnetic resonance are found.

In this paper, we study lepton pair production with polarized electron-positron beams in the context of the non-commutative standard model, an extension of the standard model based on non-commutative geometry. By employing the Seiberg–Witten map, we compute the production cross-section up to first order in the non-commutative parameter ({{Theta }_{{mu nu }}}). In our analysis we use the same value for both space-space and time-space non-commutative parameter, and we focus on collision energies in the range 300–1000 GeV, appropriate for the future ILC collider. Our main objectives are to examine the angular distribution ({{{text{d}}sigma } mathord{left/ {vphantom {{{text{d}}sigma } {{text{d}}Omega }}} right. kern-0em} {{text{d}}Omega }}) and the total cross-section, aiming to explore the effects of space-time non-commutativity at an energy scale around (Lambda sim {text{TeV}}) and the possibility of observing these effect at the ILC. Our results indicate a significant deviation in the angular distribution due to non-commutativity when (Lambda sim {{10}^{3}}{kern 1pt} {text{GeV}}). Moreover, the total cross-section for lepton pair production is more sensitive to space-time deformations in the polarized case compared to the unpolarized case. Specifically, we find that at center-of-mass energy (sqrt s = 1000{kern 1pt} ,{text{GeV}}), the deviation in the polarized case is approximately eight times larger than that in the unpolarized case. We also estimate from this study a bound on the scale of the non-commutative parameter (Lambda ).

Methods of calculation and accounting for modeling, and results obtained for the efficiencies of detectors of the central tracking system, external trackers, and time-of-flight detectors of the BM@N experiment at the Nuclotron/NICA accelerator complex are presented. The methods presented are applied to the analysis of meson and light fragment yields in the interactions of an argon beam with an energy of 3.2 AGeV with fixed targets.

The multipurpose and co-generational activities of these floating nuclear power plants (FNPP) have generated enormous attention. An essential parameter that justifies the interest in nuclear power reactors is the duration of the fuel campaign. Focus is placed on Th–U fuel cycle in all the calculations. The spectra of neutron flux of the reactor RITM-200 were analyzed for (Th²³² + U²³⁵)O₂ and (Th²³² + U²³³)O₂ fuel dispersion. The fuel campaign duration was then estimated with further studies of the dependency of fuel campaign duration on the fuel element diameter of the two dispersed fuel. The results showed that, replacement of standard fuel with (Th²³² + U²³⁵) led to marginal increases in fuel campaign duration and burnup respectively while in the case of (Th²³² + U²³³), a 44.4 and 59.9% increment is achieved in fuel campaign duration and burnup respective.

The thermal behaviour of the non-perturbative QCD vacuum has been examined in the context of the dual version of colour gauge theory in order to explore the dynamics of the quark-hadron phase transition at non-vanishing bario-chemical potential. By building the free energy change and the accompanying surface tension for the quark-hadron phase transition, the bulk properties for the quark-hadron phase have been examined. The surface tension at finite temperature is a significant quantity for the exploration of the bubble formation in the big bang scenario and for the QGP creation in ultra-relativistic heavy-ion collision.

The paper presents results on multiplicity correlations in two rapidity intervals and mean transverse momentum vs event multiplicity correlation function calculated in the developed Monte-Carlo model of multi-particle production run for p + p interactions at (sqrt {{{s}_{{NN}}}} = 900) and (7000) GeV. The model is based on interacting colour strings approach with longitudinal and transverse strings dynamics. Results are compared with the ALICE data and PYTHIA 8.3 simulations.

The Event Metadata System (EMS) developed for BM@N, a fixed target experiment of the NICA (Nuclotron-based Ion Collider fAcility) project has been designed to store and index event records for particle collisions obtained at the BM@N facility and subsequently reconstructed. The system enables to quickly search for a required set of physics events based on various given criteria for further physics analyses. The main implemented interfaces to the EMS include Web UI (user interface) and REST API (application programming interface), that are presented in the paper in detail. The both interfaces have its own main use patterns, namely, the Web UI is mostly employed for browsing the Event Catalogue and checking its overall state, while the REST API helps to integrate the EMS with other software systems of the experiment, such as the main BM@N framework, BmnRoot to conveniently select events for a particular physics analysis. The interfaces have been developed using Kotlin multiplatform technology, hence, both front-end and back-end components of the Web service are parts of one project using the same programming language and a common codebase.