Physics of Particles and Nuclei Letters最新文献

In the recent paper [Phys. Lett. B 858 (2024), 139056], a class of conserved (mathcal{N} = 2) higher-spin supercurrents was constructed using a harmonic approach, previously elaborated by the autor in collaboration with I.L. Buchbinder and E.A. Ivanov. Such supercurrents allow us to construct a wide class of abelian interactions for (mathcal{N} = 2) higher spins. The present report is a brief review of the obtained results.

We investigate the geometric Nielsen complexity of the unitary evolution of the supersymmetric quantum harmonic oscillator (SQHO), formulated on the Heisenberg–Weyl Lie superalgebra (mathfrak{s}mathfrak{h}(left. 2 right|2)).

We suggest supersymmetric generalization of the Ruijsenaars wave functions, write for them the corresponding difference equation and explain how they appear as one-point S matrix of modular transformation in (N = 1) supersymmetric Liouville field theory. We also comment on their relation with the partition function of (T[SU(2)]) three-dimensional (N = 2) supersymmetric gauge theory on squashed three-sphere modded by ({{mathbb{Z}}_{2}}) action.

The necessary and sufficient conditions to construct consistent Lagrangian formulation for irreducible interacting massless higher-spin (HS) fields on d-dimensional Minkowski space within approach with incomplete BRST operator and off-shell holonomic constraints are found. It is shown that in addition to superconmmuting of incomplete BRST operator with appropriate traceless and Young constraints, which annihilate the field and gauge parameter vectors, these constraints should form Abelian superalgebra both with BRST operator and with operators of cubic, quartic and etc. vertices. The consistent deformation of free model with constrained HS fields with integer spin requires for the cubic vertex to be by BRST-closed, traceless and Young-symmetric solution of the generating equations. The explicit form for the vertices for irreducible constrained interacting fields are obtained by means of projectors on traceless and Young-symmetric modes.

We find the novel supersymmetric deformation of the (mathbb{C}{{mathbb{P}}^{1}}) σ-model and its equivalence with the generalised chiral Gross–Neveu. This construction allows the use of field-theoretic techniques and particularly the study of renormalisability and β function. Provided approach is useful in finding conformal limits and establishes relation between chiral (GN) and sigma model (geometric) descriptions, which is explicitly demonstrated for the case of (mathbb{R} times {{S}^{1}})/Super-Thirring models. We also make remarks on its emergence in (mathcal{N} = 2) Liouville and 4-dim Chern–Simons theory.

We explore the sector of point-like string in Schrödinger spaces, reveal underlying supersymmetry and compute its Krylov complexity.

In the present work, we explore the effect of the meson cloud dressing on the octet and decuplet baryon masses within the perturbative chiral quark model by considering both the ground and excited quark propagators, in which the excited states in the quark propagators are truncated up to the low energy scale (Lambda = 1) GeV. The total results on the octet and decuplet baryon masses agree excellently with the experimental data. The study also clearly shows that the meson cloud plays an important role in the baryon mass, and the excited states in the intermediate quark propagators are significantly influential.

This work is devoted to the study of the simplest hypernuclei, namely (_{Lambda }^{3}{text{H}}) and (_{Lambda }^{4}{text{H}}), in the BM@N experiment. They may be one of the possible markers of the phase transition from nuclear matter to quark-gluon plasma in high-energy ion collisions. Reconstruction efficiency of two-body ({{pi }^{ - }})ecays of these hypernuclei was estimated using simulated data based on DCM-SMM nuclear interaction model and a realistic description of the BM@N spectrometer. A procedure to optimize significance of the observed signal of hypernuclei decays is developed and presented.

Fast neutron detection requires application of the detector material that is rich in hydrogen with a sufficient level of detection efficiency and the capability to discriminate neutron signals in the presence of undesirable gamma-ray background. In this work, we evaluated the performance of neutron modules with the measurement of gamma-sources. In particular, the light yield of the detectors was calibrated with a set of standard ²²Na, ¹³⁷Cs and ²⁴¹Am sources by the use of Compton Edge technique. In the meanwhile, the time resolution was estimated by measuring gamma-gamma coincidences with ⁶⁰Co source.

The article presents a method for measuring coherent transition radiation at one of the basic FLNR JINR installations, the MT-25 microtron, with ultra-high spectral resolution. The presented technique makes it possible to estimate the electron bunch length from measured spectra, demonstrating an effective tool for longitudinal diagnostics of charged particle beams with bunch length from a few tens of femtoseconds to a few tens of picoseconds have been demonstrated.