This article presents a theoretical investigation of the differential, integrated, elastic, inelastic, total, momentum-transfer, and viscosity cross-sections, along with total ionization cross-section, for elastically scattered electrons positrons from carbon dioxide (CO2) molecule in incident energy range 1 eV ≤Ei≤ MeV. In addition, first time, we report spin polarization e±−CO2 scattering sys...

The transport properties of quark-gluon plasma created in relativistic heavy-ion collisions are quantified by an improved global Bayesian analysis using the CERN Large Hadron Collider Pb--Pb data at $\sqrt{s_{\textbf{NN}}}=2.76\;$ and $5.02\;$TeV. results show that uncertainty extracted coefficients is significantly reduced including new sophisticated collective flow observables from two collis...

the purpose of this paper is to study the impact of using the internet on the normative, relativistic and cosmopolitan attitudes of the students of tabriz university. the writers have used the survey method in their study and obtained the data of their research through a questionnaire. the statistical sample consists of 283 graduate and doctoral students of tabriz university. the findings of th...

Using the parametrized relativistic particle we obtain the noncommutative Snyder space-time. In addition, we study the consistency conditions between the boundary conditions and the canonical gauges that give origin to noncommutative theories. Using these results we construct a first order action, in the reduced phase-space, for the Snyder particle with momenta fixed on the boundary. Pacs: 11.1...

A saddle point variational (SPV ) method was applied to the Dirac equation as an example of a fully relativistic equation with both negative and positive energy solutions. The effect of the negative energy states was mitigated by maximizing the energy with respect to a relevant parameter while at the same time minimizing it with respect to another parameter in the wave function. The Cornell pot...

We present some exact solutions to the ideal hydrodynamics of a relativistic superfluid with an almost-conformal equation state. The have stress tensors which are invariant under Lorentz boosts in one direction, and represent generalisations Bjorken Gubser flows. also study corrections flows first-order hydrodynamics, arguing that dissipation is dominated by shear viscosity. simple numerical fo...

We prove that particle models whose action is given by the integrated n-th curvature function over the world line possess n+ 1 gauge invariances. A geometrical characterization of these symmetries is obtained via Frenet equations by rephrasing the n-th curvature model in Rd in terms of a standard relativistic particle in Sd−n. We “prove by example” that the algebra of these infinitesimal gauge ...

nowdays, production of high quality engine oils is one of the worries of our country’s engine oil industry. in this study, the behavior of four commercial polymers used in nation motor oil industry in obtaining the best viscosity index improver was investigated. in this regard, viscometric behavior, shear stability and polymers’ performance for engine cranking were compared at low temperature. ...