Results 51 to 60 of about 2,132,739 (345)
Faddeev-type equations for three-body symmetry violating scattering amplitudes [PDF]
, 2010 The equations which relate three-body and two-body symmetry violating scattering amplitudes are derived in the first order of symmetry violating interactions.
L. D. Faddeev +3 more
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ANALYTIC SCATTERING AMPLITUDES FOR QCD [PDF]
Proceedings of the Conference in Honor of C N Yang's 85th Birthday, 2008 By analytically continuing QCD scattering amplitudes through specific complexified momenta, one can study and learn about the nature and the consequences of factorization and unitarity. In some cases, when coupled with the largest time equation and gauge invariance requirement, this approach leads to recursion relations, which greatly simplify the ...
Diana Vaman, York-Peng Yao
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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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Likelihood equations and scattering amplitudes [PDF]
Algebraic Statistics, 2020 We relate scattering amplitudes in particle physics to maximum likelihood estimation for discrete models in algebraic statistics. The scattering potential plays the role of the log-likelihood function, and its critical points are solutions to rational ...
B. Sturmfels, Simon Telen
semanticscholar +1 more source
MHV gluon scattering amplitudes from celestial current algebras [PDF]
Journal of High Energy Physics, 2020 We show that the Mellin transform of an n-point tree level MHV gluon scattering amplitude, also known as the celestial amplitude in pure Yang-Mills theory, satisfies a system of (n−2) linear first order partial differential equations corresponding to (n ...
Shamik Banerjee, Sudip Ghosh
semanticscholar +1 more source
, 2011 We review two novel techniques used to calculate tree-level scattering amplitudes efficiently: MHV diagrams, and on-shell recursion relations. For the MHV diagrams, we consider applications to tree-level amplitudes and focus in particular on the N=4 ...
Adamo T Mason L +55 more
core +1 more source
Three-loop helicity amplitudes for four-quark scattering in massless QCD
Journal of High Energy Physics, 2021 We compute the three-loop corrections to the helicity amplitudes for q q ¯ $$ \overline{q} $$ → Q Q ¯ $$ \overline{Q} $$ scattering in massless QCD. In the Lorentz decomposition of the scattering amplitude we avoid evanescent Lorentz structures and map ...
Fabrizio Caola +4 more
doaj +1 more source
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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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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