Results 71 to 80 of about 420,119 (232)
Two-Dimensional Attenuation and Velocity Tomography of Iran
Geosciences, 2022 Seismic bulletin data collected by the Iranian Seismological Center are used to image crust and mantle seismic attenuation, group velocity, and phase velocities for Lg, Pg, Sn, and Pn phases.
Thomas M. Hearn
doaj +1 more source
Amplitude of Elastic Scattering for the Region of Large Impact Parameters
Cumhuriyet Science Journal, 2019 The work is dedicated to consequences of analyticity and unitarity ofthe scattering amplitude. Using theGaussian quasipotential an equation for the scattering amplitude matrix isobtained and formula is derived for the cross sections.
T.o. Bayramova +2 more
doaj +1 more source
Approximation of the scattering amplitude [PDF]
, 2007 The simultaneous solution of Ax=b and ATy=g is required in a number of situations. Darmofal and Lu have proposed a method based on the Quasi-Minimal residual algorithm (QMR). We will introduce a technique for the same purpose based on the LSQR method and
Golub, Gene H. +2 more
core +2 more sources
On triple-cut of scattering amplitudes
Physics Letters B, 2007 It is analysed the triple-cut of one-loop amplitudes in dimensional regularisation within spinor-helicity representation. The triple-cut is defined as a difference of two double-cuts with the same particle content, and a same propagator carrying, respectively, causal and anti-causal prescription in each of the two cuts. That turns out into an effective
openaire +5 more sources
QCD factorizations in gamma* gamma* -> rho rho
, 2006 We calculate the lowest order QCD amplitude, i.e. the quark exchange contribution, to the forward production amplitude of a pair of longitudinally polarized $\rho$ mesons in the scattering of two virtual photons $\gamma^*(Q_1) \gamma^*(Q_2) \to \rho^0_L \
Anikin +25 more
core +2 more sources
IEEE AccessThe plasma sheath can absorb or reflect electromagnetic waves, thus affecting the communication of hypersonic vehicles. The study of attenuation and enhancement of electromagnetic scattering by plasma is of great significance.
Caixiong Han, Jiajie Wang, Lanfang Ding
doaj +1 more source
Scaled analog measurements of light scattering by aggregates with merging monomers
Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011 This work reports on the experimental analysis of light scattering by aggregates with merging monomers. For such complex shape particles, scaled targets can be built using a rapid prototyping technique (stereo lithography).
J.-M. Geffrin +3 more
doaj +1 more source
Calculation of Atomic Scattering Factor For X-ray in Copper
Tikrit Journal of Pure Science, 2023 In this paper the atomic scattering factor f( has been calculated for x-ray in copper using Wave function involves The independent particle approximation for the values , The physical importance of this factor appears in its relation with the several ...
Muhsin Hasan Ali
doaj +1 more source
Fixed-Angle Elastic Hadron Scattering [PDF]
, 1999 The scattering amplitude in the dual model with Mandelstam analyticity and trajectory $\alpha (s)=\alpha_{0}-\gamma \ln [ (1+\beta \sqrt{s_{0} -s})/(1+ \beta \sqrt{s_{0}})]$ is studied in the limit $s,|t|\to \infty, s/t=const.$ By using the saddle point ...
A. Duncan +27 more
core +4 more sources
AN INTEGRAL EQUATION FOR SCATTERING AMPLITUDES
Physical Review Letters, 1969 We outline a dynamical scheme for studying Regge behavior of scattering amplitudes. It is based on unitarity and the concept of short-range momentum-space correlations in high-energy processes.
Chew, G. F. +2 more
openaire +4 more sources