Results 21 to 30 of about 420,119 (232)
Scattering amplitudes in affine gravity [PDF]
Physical Review D, 2021 Affine gravity is a connection-based formulation of gravity that does not involve a metric. After a review of basic properties of affine gravity, we compute the tree-level scattering amplitude of scalar particles interacting gravitationally via the connection in a curved spacetime.
Benjamin Knorr, Chris Ripken
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Tidal effects for spinning particles
Journal of High Energy Physics, 2021 Expanding on the recent derivation of tidal actions for scalar particles, we present here the action for a tidally deformed spin-1/2 particle. Focusing on operators containing two powers of the Weyl tensor, we combine the Hilbert series with an on-shell ...
Rafael Aoude +2 more
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Quasiclassical Green function in an external field and small-angle scattering [PDF]
, 1999 The quasiclassical Green functions of the Dirac and Klein-Gordon equations in the external electric field are obtained with the first correction taken into account.
A. I. Akhiezer +21 more
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Protostring scattering amplitudes [PDF]
Physical Review D, 2016 We calculate some tree level scattering amplitudes for a generalization of the protostring, which is a novel string model implied by the simplest string bit models. These bit models produce a lightcone worldsheet which supports $s$ integer moded Grassmann fields.
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A note on polytopes for scattering amplitudes [PDF]
Journal of High Energy Physics, 2012 24 pages, 22 ...
Arkani-Hamed, N +4 more
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Wave-scattering from a gently curved surface
Physics Letters B, 2016 We study wave scattering from a gently curved surface. We show that the recursive relations, implied by shift invariance, among the coefficients of the perturbative series for the scattering amplitude allow to perform an infinite resummation of the ...
Giuseppe Bimonte
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On the Cuts of Scattering Amplitudes [PDF]
Nuclear Physics B - Proceedings Supplements, 2008 The use of complex analysis for computing one-loop scattering amplitudes is naturally induced by generalised unitarity-cut conditions, fulfilled by complex values of the loop variable. We report on two techniques: the cut-integration with spinor-variables as contour integrals of rational functions; and the use of the Discrete Fourier Transform to ...
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Scattering Amplitudes: Celestial and Carrollian
Physical Review Letters, 2022 21 ...
Arjun Bagchi +3 more
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Complex forward scattering coefficient for signal characterisation
The Journal of Engineering, 2019 In this study, modelling and characteristics analysis of forward scattering coefficients and echoes are investigated. Traditional ground-target forward scattering signal model has not considered the impact of scattering phase; thus it is not accurate ...
Jing Chen +3 more
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Photoacoustics, 2020 Time-domain Brillouin scattering is an opto-acousto-optical probe technique for the evaluation of transparent materials. Via optoacoustic conversion, ultrashort pump laser pulses launch coherent acoustic pulses in the sample.
Vitalyi E. Gusev
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