We study the effect of a strong magnetic field on properties neutron stars with quark-hadron phase transition. It is shown that prevents appearance quark phase, enhances leptonic fraction, decreases baryonic density extension mixed and stiffens total equation state, including both stellar matter contributions. Two parametrisations dependent static field, increasing, respectively, fast slowly reaching $2-4\times 10^{18}$G in center star, are considered. The compact fields have maximum mass...

We study the quark deconfinement phase transition in hot β-stable hadronic matter. Assuming a first order transition, we calculate enthalpy per baryon of hadron–quark transition. and compare nucleation rate time due to thermal quantum mechanisms. compute crossover temperature above which dominates finite mechanism. next discuss consequences for physics proto-neutron stars. introduce concept limiting conversion critical mass Mcr proto-hadronic stars, show that stars with M<Mcr could survive...

This study examines the English language competency (ELC) and pedagogical (PC) of prospective teachers in teacher education institutes (TEIs) across Odisha, India. Recognizing importance good training for effective teaching, this research employed a mixed-method approach, assessing sample 70 trainee-teachers through standardized knowledge test complemented by qualitative question, addressing challenges faced them. The results were concerning, with average scores 42.36% ELC 46.36% PC,...

We present a new hybrid method to solve the relativistic Hartree-Fock-Roothan equations where one- and two-electron radial integrals are evaluated numerically by defining basis functions on grid. This procedure reduces computational costs in evaluation of integrals. The orbitals generated this employed compute ionization potentials, excitation energies oscillator strengths alkali-metal atoms elements group IIIA through second order many-body perturbation theor other correlated theories.

The phase transition to a deconfined is studied and the consequences in formation of neutron stars are investigated. We use quark-meson coupling model for hadron matter MIT bag quark order build appropriate equations state hybrid stars. properties then calculated. differences between unpaired color-flavor locked discussed.

We study here hot nuclear matter in the quark meson coupling model which incorporates explicitly degrees of freedom, with quarks coupled to scalar and vector mesons. The equation state including composite nature nucleons is calculated at finite temperatures. calculations are done taking into account medium-dependent bag constant. Nucleon properties temperatures as found be appreciably different from value $T=0.$

The properties of neutron stars, consisting a crust hadrons and an internal part kaon condensate, are calculated within the quark-meson-coupling model. We considered stars with nucleons only in hadron phase also hyperons as well. results compared ones obtained from nonlinear Walecka model for hadronic phase.

Pure hadronic compact stars, above a threshold value of their gravitational mass (central pressure), are metastable to the conversion quark stars (hybrid or strange stars). In this paper, we present systematic study metastability pure using different relativistic models for equation state. particular, compare results quark-meson coupling model with those Glendenning-Moszkowski parametrization nonlinear Walecka model. For model, find large values...

We investigate the effects of strong magnetic fields on equation state warm stellar matter as it may occur in a protoneutron star. Both neutrino-free and neutrino-trapped at fixed entropy per baryon are analyzed. A relativistic mean-field nuclear model, including possibility hyperon formation, is considered. density-dependent field with magnitude ${10}^{15}\phantom{\rule{0.28em}{0ex}}\mathrm{G}$ surface not more than...

We have calculated the properties of nuclear matter in a self-consistent manner with quark-meson coupling mechanism incorporating structure nucleons vacuum through relativistic potential model; where dominant confining interaction for free independent quarks inside nucleon is represented by phenomenologically average equally mixed scalar-vector harmonic form. Corrections due to spurious center mass motion as well those other residual interactions, such one gluon exchange at short distances...

The possibility of the appearance $\mathrm{\ensuremath{\Delta}}$(1232) isobars in neutron star matter and so-called $\mathrm{\ensuremath{\Delta}}$ puzzle is investigated a relativistic quark model where confining interaction for quarks inside baryon represented by phenomenological average potential an equally mixed scalar-vector harmonic form. hadron-hadron nuclear then realized introducing additional couplings to $\ensuremath{\sigma}$, $\ensuremath{\omega}$, $\ensuremath{\rho}$ mesons...

We determine the equation of state (EOS) nuclear matter with inclusion hyperons in a self-consistent manner by using modified quark meson coupling model where confining interaction for quarks inside baryon is represented phenomenological average potential an equally mixed scalar-vector harmonic form. The hadron-hadron then realized introducing additional couplings to $\ensuremath{\sigma},\phantom{\rule{0.16em}{0ex}}\ensuremath{\omega}$, and $\ensuremath{\rho}$ mesons through mean-field...

We investigate compact star properties within the quark-meson-coupling model with a soft symmetry energy density dependence at large densities. In particular, hyperon content and mass/radius curves for families of stars obtained are discussed. The hyperon-meson couplings chosen according to experimental values nuclear matter potentials, possible uncertainties considered. It is shown that softer gives rise less hyperons, smaller radii, larger masses. Hyperon-meson may also have strong effect...

In the framework of relativistic mean field theory, we study effect nonlinear cross coupling between isoscalar–vector and isovector–vector mesons on top G2 parametrization. The energy pressure densities are calculated over a wide range baryon densities. observables such as symmetry related coefficients also evaluated systematically. symmetric nuclear matter is studied. work further extended to β-equilibrium estimate mass radius neutron stars octet see equation state.

We study nuclear symmetry energy and the thermodynamic instabilities of asymmetric matter in a self-consistent manner by using modified quark-meson coupling model where confining interaction for quarks inside nucleon is represented phenomenologically averaged potential an equally mixed scalar-vector harmonic form. The nucleon-nucleon then realized introducing additional quark couplings to $\ensuremath{\sigma},\phantom{\rule{0.16em}{0ex}}\ensuremath{\omega}$, $\ensuremath{\rho}$ mesons...

We investigate the phase transition to a deconfined and consequences in formation of neutron stars. use recently proposed effective-field-theory-motivated relativistic mean-field theory for hadrons MIT bag model color-flavor locked (CFL) quark matter get appropriate equation state. The properties stars are then calculated. differences between unpaired CFL discussed.

Abstract In the present study Co 3 O 4 and Sr‐Co nanoparticles were prepared by sol‐gel co‐precipitation methods tested as photo‐catalysts for degradation of methylene blue (MB, model molecule thiazine dyes class) malachite green (MG, triphenylmethane category)under solar light irradiation. To photocatalytic activity, was doped three different weight percentages strontium (5%, 10%, 15%). Among these, 10 wt% , named (10)Sr‐Co showed maximum photodegradation efficiency toward both MB MG. Their...

Back-to-back correlations of particle-antiparticle pairs are related to the in-medium mass-modification and squeezing quanta involved. They predicted appear when hot dense hadronic matter is formed in high energy nucleus-nucleus collisions. The survival magnitude back-to-back (BBC) boson-antiboson generated by mass modifications studied here case a thermalized, finite-sized, spherically symmetric expanding medium. We show that BBC signal indeed survives finite-time emission, as well...

In the present work we include isovector-scalar \ensuremath{\delta} meson in quark-meson coupling (QMC) model and study properties of asymmetric nuclear within QMC without with meson. Recent constraints set by isospin diffusion on slope parameter symmetry energy at saturation density are used to adjust parameters. The thermodynamical spinodal surfaces obtained instability region subsaturation densities QMC\ensuremath{\delta} models compared mean-field relativistic models. distillation effect...

In this work the low density regions of nuclear and neutron star matter are studied. The search for existence pasta phases in region is performed within context quark-meson coupling (QMC) model, which incorporates quark degrees freedom. Fixed proton fractions considered, as well beta equilibrium at zero temperature. We discuss recent attempts to better understand surface energy coexistence regime we present results that show subject some choices coefficient. also analyze influence on...

We investigate the occurrence of a ferromagnetic phase transition in high density hadronic matter (e.g., interior neutron star). This could be induced by four-fermion interaction analogous to one which is responsible for chiral symmetry breaking Nambu–Jona-Lasinio model, it related through Fierz transformation. Flavor SU(2) and flavor SU(3) quark are considered. A second-order predicted at densities about 5 times normal nuclear density. It also found that matter, first-order from so-called 2...