Possible Restoration of Z3Z_3 Symmetry in the Presence of Fundamental Higgs

We study the $Z_3$ symmetry in SU(3) Higgs theory using Monte Carlo simulation methods. We focus mainly on the distribution of the Polyakov loop and related parameters to study the $Z_3$ symmetry. We show that the $Z_3$ symmetry is explicitly broken when Higgs condesate acquires a nonzero value. However, we also show that there is a possibility of the $Z_3$ symmetry in the Higgs symmetric phase where Higgs condensate vanishes

1/Nc1/N_c approximation and universality of vector mesons

In this work, we argue that the observed differences in the value of the vector coupling constant extracted from the decays $\rho\to \pi\pi$ ($g_{\rho} = 6.0$), $\rho\to l^+l^-$ ($g_{\rho} = 5.0$) and $\omega\to l^+ l^-$ ($g_{\rho} = 5.7$), where $l=e,\mu$, are an indication of the important role played by the $1/N_c$ corrections in the description of these processes. We show that an emission of a photon by charged meson loops in the $\rho^0, \omega,\phi\to\gamma$ transitions is a key process that allows to describe above vector meson decays into two leptons with a single value $g_\rho = 6.0$. Our result supports the idea of universality of neutral vector mesons and clarifies the role of accounting of $1/N_c$ corrections to its fulfilment

Self-consistent methods for structure and production of heavy and superheavy nuclei

Self-consistent methods for the structure ofheavy and superheavy nuclei are reviewed. The constructionand application of energy-density functionals are discussed.The relationship between the self-consistent methods andmicroscopic-macroscopic approaches is considered on themean-field level. The extraction of single-particle potentialsfrom the energy-density functional is described. The isotopicdependence of nucleon distributions and its influence on thenucleus–nucleus interaction is analyzed. As a new additionalcondition we introduce that the energy-density functionalmust describe the heights of the Coulomb barriers in nucleus–nucleus interaction potentials, thus imposing constraints onthe properties of the functional at low matter densities. Theself-consistent methods are applied to describe the quasiparticle structure, cluster radioactivity, and fission of the heaviestnuclei. These methods are used to predict the probabilities ofβ-delayed multi-neutron emission and half-lives of β-decaysand electron captures in heavy and superheavy nuclei. Thepredicted properties of superheavy nuclei are used to estimate the production cross-sections of superheavy nuclei incomplete fusion reactions

A High Pressure Time Projection Chamber with Optical Readout

Measurements of proton-nucleus scattering and high resolution neutrino-nucleus interaction imaging are key to reduce neutrino oscillation systematic uncertainties in future experiments. A High Pressure Time Projection Chamber (HPTPC) prototype has been constructed and operated at Royal Holloway University of London and CERN as a first step in the development of a HPTPC capable of performing these measurements as part of a future long-baseline neutrino oscillation experiment such as the Deep Underground Neutrino Experiment. In this paper we describe the design and operation of the prototype HPTPC with an argon based gas mixture. We report on the successful hybrid charge and optical readout, using four CCD cameras, of signals from Am-241 sources

Study of 123^{123}Ag β\beta -decay at ALTO

The neutron rich $^{123}$Ag nucleus was populated via induced photofission of UC$_x$ at the ALTO ISOL facility. Its $\beta$-decay properties were studied by means of detecting $\beta$-delayed $\gamma$ and neutron activities. The measured half-life T$_{1/2}$ = 0.350(20) s agreed with the earlier data; the $\beta$-delayed neutron emission branching P$_{1n}$ = 1.01(24)% was reestablished using $\gamma$ and neutron counting

Charge exchange dp→(pp)ndp \rightarrow (pp)n reaction study at 1.75 A GeV/c by the STRELA spectrometer

The differential cross sections of the charge exchange reaction $dp \rightarrow (pp)n$ has been measured at 1.75 GeV/c per nucleon for small transferred momenta using the one arm magnetic spectrometer STRELA at the Nuclotron accelerator in JINR Dubna. The ratio of the differential cross section of the charge exchange reaction $dp \rightarrow (pp)n$ to that of the $np \rightarrow pn$ elementary process is discussed in order to estimate the spin-dependent part of the $np \rightarrow pn$ charge exchange amplitude. The $np \rightarrow pn$ amplitude turned out to be predominantly spin-dependent

Impact of Chronic Oral Administration of Silver Nanoparticles on Cognitive Abilities of Mice

To assess the effect of silver nanoparticles on mice cognitive abilities, daily, up to 4-month period, experimental mice were administrated with silver nanoparticles solution. Accumulation of silver in brain was assessed by neutron activation analysis. Cognitive abilities in mice before and after silver nanoparticles administration were evaluated in the Morris water maze behavioral test. No significant differences in the amounts of silver accumulated in brain were found between capable and incapable animals. Silver accumulation in brain of experimental animals in 4-months experiment was higher than in 2-months experiment for both groups. In the main Morris water maze behavioral test at the control points of 2 and 4 months no statistically significant differences were found in the parameters of treks between experimental and control animals

Angular Distributions of Emitted Electrons in the Two-Neutrino ββ Decay

The two-neutrino double-beta decay (2νββ-decay) process is attracting more and more attention of the physics community due to its potential to explain nuclear structure aspects of involved atomic nuclei and to constrain new (beyond the Standard model) physics scenarios. Topics of interest are energy and angular distributions of the emitted electrons, which might allow the deduction of valuable information about fundamental properties and interactions of neutrinos once a new generation of the double-beta decay experiments will be realized. These tasks require an improved theoretical description of the 2νββ-decay differential decay rates, which is presented. The dependence of the denominators in nuclear matrix elements on lepton energies is taken into account via the Taylor expansion. Both the Fermi and Gamow-Teller matrix elements are considered. For nuclei of experimental interest, relevant phase-space factors are calculated by using exact Dirac wave functions with finite nuclear size and electron screening. The uncertainty of the angular correlation factor on nuclear structure parameters is discussed. It is emphasized that the effective axial-vector coupling constant gAeff can be determined more reliably by accurately measuring the angular correlation factor

Bayesian analysis of multimessenger M-R data with interpolated hybrid EoS

We introduce a family of equations of state (EoS) for hybrid neutron star (NS) matter that is obtained by a two-zone parabolic interpolation between a soft hadronic EoS at low densities and a set of stiff quark matter EoS at high densities within a finite region of chemical potentials $\mu_H < \mu < \mu_Q$. Fixing the hadronic EoS as the APR one and chosing the color-superconductiong, nonlocal NJL model with two free parameters for the quark phase, we perform Bayesian analyses with this two-parameter family of hybrid EoS. Using three different sets of observational constraints that include the mass of PSR J0740+6620, the tidal deformability for GW170817 and the mass-radius relation for PSR J0030+0451 from NICER as obligatory (set 1), while set 2 uses the possible upper limit on the maximum mass from GW170817 as additional constraint and set 3 instead the possibility that the lighter object in the asymmetric binary merger GW190814 is a neutron star. We confirm that in any case the quark matter phase has to be color superconducting with the dimensionless diquark coupling approximately fulfilling the Fierz relation $\eta_D=0.75$ and the most probable solutions exhibiting a proportionality between $\eta_D$ and $\eta_V$, the coupling of the repulsive vector interaction that is required for a sufficiently large maximum mass. We anticipate the outcome of the NICER radius measurement on PSR J0740+6220 as a fictitious constraint and find evidence for claiming that GW190814 was a binary black hole merger if the radius will be 11 km or less