Results 51 to 60 of about 420,119 (232)
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
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Near-threshold hadron scattering with effective field theory [PDF]
EPJ Web of Conferences. When an exotic hadron locates near the threshold with the channel couplings, the internal structure of the exotic hadron is related to the scattering length. To incorporate the threshold effect, the Flatté amplitude has been often used to determine the
Sone Katsuyoshi, Hyodo Tetsuo
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Small-angle scattering on a system of magnetic and electric charges [PDF]
, 1996 The generalization of the conformal scattering method for small-angle scattering processes involving magnetic monopoles and ordinary charges is constructed.
Penttinen, M.
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, 2013 The purpose of this review is to bridge the gap between a standard course in quantum field theory and recent fascinating developments in the studies of on-shell scattering amplitudes. We build up the subject from basic quantum field theory, starting with Feynman rules for simple processes in Yukawa theory and QED.
Elvang, Henriette, Huang, Yu-tin
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Scattering amplitudes of fermions on monopoles
Journal of High Energy Physics, 2023 Abstract We consider scattering processes involving massless fermions and ’t Hooft-Polyakov magnetic monopoles in a minimal SU(2) model and in the Grand Unified SU(5) theory. We construct expressions for on-shell amplitudes for these processes in the J = 0 partial wave using the spinor helicity basis consisting of single-particle ...
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Three-Body Scattering Below Breakup Threshold: An Approach without using Partial Waves [PDF]
, 1999 The Faddeev equation for three-body scattering below the three-body breakup threshold is directly solved without employing a partial wave decomposition. In the simplest form it is a three-dimensional integral equation in four variables. From its solution
Elster, Ch., Gloeckle, W., Schadow, W.
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BFKL equation in the next-to-leading order: solution at large impact parameters
European Physical Journal C: Particles and Fields, 2019 In this paper, we show (1) that the NLO corrections do not change the power-like decrease of the scattering amplitude at large impact parameter ($$b^2 \,>\,r^2 \exp ( 2{\bar{\alpha }}_S\eta (1 + 4 {\bar{\alpha }}_S) )$$ b2>r2exp(2α¯Sη(1+4α¯S)) , where r ...
Carlos Contreras +2 more
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Scattering amplitudes and contour deformations [PDF]
Physical Review D, 2019 We employ a scalar model to exemplify the use of contour deformations when solving Lorentz-invariant integral equations for scattering amplitudes. In particular, we calculate the onshell 2 -> 2 scattering amplitude for the scalar system. The integrals produce branch cuts in the complex plane of the integrand which prohibit a naive Euclidean ...
Pedro Duarte +4 more
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Scattering amplitudes and electromagnetic horizons
Journal of High Energy Physics, 2023 Abstract We consider the scattering of charged particles on particular electromagnetic fields which have properties analogous to gravitational horizons. Classically, particles become causally excluded from regions of spacetime beyond a null surface which we identify as the ‘electromagnetic horizon’.
Anton Ilderton, William Lindved
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A Tutorial on the Classical Theories of Electromagnetic Scattering and Diffraction
Nanophotonics, 2020 Starting with Maxwell’s equations, we derive the fundamental results of the Huygens-Fresnel-Kirchhoff and Rayleigh-Sommerfeld theories of scalar diffraction and scattering.
Mansuripur Masud
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