Results 71 to 80 of about 2,316,597 (371)
Stability of the determination of the surface impedance of an obstacle from the scattering amplitude [PDF]
, 2012 We prove a stability estimate of logarithmic type for the inverse problem consisting in the determination of the surface impedance of an obstacle from the scattering amplitude.
M. Bellassoued, M. Choulli, A. Jbalia
semanticscholar +1 more source
Surface-Integral Approach to the Coulomb Few-Body Scattering Problem
EPJ Web of Conferences, 2010 We present main features of a surface-integral approach to the Coulomb few-body scattering problem. This approach is valid for both short-range and Coulombic longe-range interactions.
Stelbovics A.T. +3 more
doaj +1 more source
Four-gauge-particle scattering amplitudes and Polyakov string path integral in the proper-time gauge
Physics Letters B, 2019 We evaluate four-gauge-particle tree level scattering amplitudes using the Polyakov string path integral in the proper-time gauge, where the string path integral can be cast into the Feynman-Schwinger proper-time representation.
Taejin Lee
doaj +1 more source
Scattering of color dipoles: from low to high energies [PDF]
, 2002 A dipole-dipole scattering amplitude is calculated exactly in the first two orders of perturbation theory. This amplitude is an analytic function of the relative energy and the dipoles' sizes.
Babansky, Alexander, Balitsky, Ian
core +3 more sources
Pion-pion scattering amplitude [PDF]
Physical Review D, 2005 We obtain reliable ππ scattering amplitudes consistent with experimental data, both at low and high energies, and fulfilling appropriate analyticity properties. We do this by first fitting experimental low energy [s^(1/2) ≤ (1.42 GeV] phase shifts and inelasticities with expressions that incorporate analyticity and unitarity.
Peláez Sagredo, José Ramón +1 more
openaire +4 more sources
Scattering amplitudes in Lifshitz spacetime [PDF]
Classical and Quantum Gravity, 2014 We consider the calculation of scattering amplitudes in field theories dual to Lifshitz spacetimes. These amplitudes provide an interesting probe of the IR structure of the field theory; our aim is to use them to explore the observable consequences of the singularity in the spacetime.
Andrade, T., Ross, Simon F., Lei, Y.
openaire +4 more sources
Scattering of Electromagnetic Waveson Lattices of Rectangular Dielectric Resonators
Vìsnik Nacìonalʹnogo Tehnìčnogo Unìversitetu Ukraïni Kììvsʹkij Polìtehnìčnij Ìnstitut: Serìâ Radìotehnìka, Radìoaparatobuduvannâ, 2021 The c-functions that determine the degree of influence of an external exciting electromagnetic field on a rectangular dielectric resonator (DR) in open space are calculated and investigated.
О. О. Трубін
doaj +1 more source
A New Proposal for the Picture Changing Operators in the Minimal Pure Spinor Formalism
, 2011 Using a new proposal for the "picture lowering" operators, we compute the tree level scattering amplitude in the minimal pure spinor formalism by performing the integration over the pure spinor space as a multidimensional Cauchy-type integral.
CR Mafra +25 more
core +1 more source
Nuclear and Particle Physics Proceedings, 2015 AbstractI analyze the algebraic patterns underlying the structure of scattering amplitudes in quantum field theory. I focus on the decomposition of amplitudes in terms of independent functions and the systems of differential equations the latter obey.
openaire +4 more sources
Heterodyne x-ray diffuse scattering from coherent phonons
Structural Dynamics, 2017 Here, we report Fourier-transform inelastic x-ray scattering measurements of photoexcited GaAs with embedded ErAs nanoparticles. We observe temporal oscillations in the x-ray scattering intensity, which we attribute to inelastic ...
M. Kozina +11 more
doaj +1 more source