In order to study the distribution of stress and deformation variable cross-section continuous box girder bridge, in this paper, finite element method is used establish model bridge. Considering layout lane load, combination working conditions calculated, bridge are analysed. The results show that maximum generally occurs at beam span middle section or support, sometimes value vehicle load poin...

We evaluate the differential cross section for the electroproduction of lepton pairs off a polarized nucleon target in the generalized Bjorken region to leading power accuracy in hard momentum. We discuss the importance of this process for phenomenology of generalized parton distributions. A special attention is given to the sensitivity of physical observables, i.e., diverse asymmetries, to the...

Open boundary conditions. Since the source current, Eq. 1, extends from z = −∞ to +∞ whereas our computational domain is finite, one has to apply suitable boundary conditions (see also [2]). Consider some accelerator component, residing in a vacuum cavity with attached beam pipe of smaller cross section than the cavity. Generally, the transitions from the pipe to the module have to be included ...

Data taken by the SLD Collaboration at the Stanford Linear Collider on e+ e-> Z0 obtained with a polarized electron beam have enabled many incisive tests of the electroweak sector of the standard model to be performed. We discuss our recent determinations of sinθw, derived from the total cross section asymmetry, and the quark final state asymmetries, As, Ac, Ab and branching ratios, Rc and Rb. ...

We study the production and leptonic decay of charginos in collisions of polarized photon beams including the complete spin correlations. The photons can be generated by Compton backscattering of polarized laser pulses off a polarized electron beam. Since the production process is determined alone by the electromagnetic coupling of the charginos this process allows to study their decay dynamics...

We study the wave equation for a massive scalar field in three-dimensional AdS (anti de Sitter) and dS (de Sitter) spaces to find what is the difference and similarity between two spaces. Here the AdS space is provided by the BTZ black hole with J = 0. To investigate its event (cosmological) horizons, we compute the absorption cross section, quasinormal modes, and study the AdS(dS)/CFT correspo...

We find the origin of logarithmic correction to the absorption cross section by studying the spin–dependent wave equation in three-dimensional anti-de Sitter space(AdS3). It turns out that all test fields(ψν=1) coupled to (1,1), (2,0), (0,2) operator on the boundary at infinity receive logarithmic corrections. These are a minimally coupled scalar and gauge bosons. It turns out that these correc...

Processes with the t-channel singularity in the physical region: finite beam sizes make cross sections finite Abstract It is known that some high-energy processes have a t-channel singularity in the physical region. In this paper we show that this singularity is regularized if one takes into account the finite sizes of the colliding beams, i.e. the realistic situation which takes place at high–...