Effects of ϕ0\phi_0-meson on the EOS of hyperon star in the relativistic mean field model

Nuclear effective interactions are considered as a vital tool to guide into the region of the high degree of isospin asymmetry and density. We take varieties of parameter sets of the RMF model to show the parametric dependence of the hyperon star properties. We add $\phi_0$-meson to $\sigma$-$\omega$-$\rho$ model. The effects of $\phi_0$-meson on the equation of state and consequently on the maximum mass of the hyperon star are discussed. Due to the inclusion of $\phi_0$-meson the threshold density of different hyperon production shift to higher density region. The effects of the hyperon-meson coupling constants on the maximum mass and radius of the hyperon stars are discussed

Use of transverse beam polarization to probe anomalous VVH interactions at a Linear Collider

We investigate use of transverse beam polarization in probing anomalous coupling of a Higgs boson to a pair of vector bosons, at the International Linear Collider (ILC). We consider the most general form of VVH (V = W/Z) vertex consistent with Lorentz invariance and investigate its effects on the process e+ e- --> f bar{f} H, f being a light fermion. Constructing observables with definite CP and naive time reversal (tilde T) transformation properties, we find that transverse beam polarization helps us to improve on the sensitivity of one part of the anomalous ZZH coupling that is odd under CP. Even more importantly it provides the possibility of discriminating from each other, two terms in the general ZZH vertex, both of which are even under CP and tilde T. Use of transverse beam polarization when combined with information from unpolarized and linearly polarized beams therefore, allows one to have completely independent probes of all the different parts of a general ZZH vertex.Comment: 15 pages, 3 figures, published versio

Dynamical Restoration of Z_N Symmetry in SU(N)+Higgs Theories

We study the Z_N symmetry in SU(N)+Higgs theories with the Higgs field in the fundamental representation. The distributions of the Polyakov loop show that the Z_N symmetry is explicitly broken in the Higgs phase. On the other hand, inside the Higgs symmetric phase the Polyakov loop distributions and other physical observables exhibit the Z_N symmetry. This effective restoration of the Z_N symmetry changes the nature of the confinement-deconfinenement transition. We argue that the Z_N symmetry will lead to time independent topological defect solutions in the Higgs symmetric deconfined phase which will play important role at high temperatures.Comment: 13 pages, 4 figure

Preparation of Hydroxyapatite Porous Scaffold

The present work deals with the preparation and study of bioceramic scaffold using hydroxyapatite powder as the source material. Hap powder was prepared by Co-Precipitation technique using Ca(NO3)2.4H2O and (NH4)2HPO4 as raw materials. X-ray diffraction (XRD), Fourier Transform InfraRed (FTIR) spectroscopy and BET analysis were used to characterize the Hap powder and calculate its crystallite size, surface area and particle size. Polyethylene glycol (PEG – 600) was used as the pore former to produce the bioceramic scaffold. Bulk density, apparent porosity and compressive strength of the scaffold were calculated. Thereafter, characterization techniques like Mercury Intrusion Porosimetry and Scanning Electron Microscopy (SEM) were carried out to study the macro/micro pores and microstructure of the scaffold in detail. In the end, in-vitro bioactivity using SBF was done which was followed by a detailed SEM study of the SBF-treated scaffold which showed the growth of tissue over the scaffold surface