Scattering of massless particles: scalars, gluons and gravitons

@article{Cachazo2013ScatteringOM,
  title={Scattering of massless particles: scalars, gluons and gravitons},
  author={Freddy Cachazo and Song He and Ellis Ye Yuan},
  journal={Journal of High Energy Physics},
  year={2013},
  volume={2014},
  pages={1-33}
}
A bstractIn a recent note we presented a compact formula for the complete tree-level S-matrix of pure Yang-Mills and gravity theories in arbitrary spacetime dimension. In this paper we show that a natural formulation also exists for a massless colored cubic scalar theory. In Yang-Mills, the formula is an integral over the space of n marked points on a sphere and has as integrand two factors. The first factor is a combination of Parke-Taylor-like terms dressed with U(N ) color structures while… 

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Scattering equations and a new factorization for amplitudes. Part I. Gauge theories

  • H. Gomez
  • Mathematics
    Journal of High Energy Physics
  • 2019
A bstractIn this work we show how a double-cover (DC) extension of the Cachazo, He and Yuan formalism (CHY) can be used to provide a new realization for the factorization of the amplitudes involving

Fermions and the scattering equations

A bstractThis paper investigates how tree-level amplitudes with massless quarks, gluons and/or massless scalars transforming under a single copy of the gauge group can be expressed in the context of

One-loop amplitudes on the Riemann sphere

A bstractThe scattering equations provide a powerful framework for the study of scattering amplitudes in a variety of theories. Their derivation from ambitwistor string theory led to proposals for

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A bstractIn the formulation of Cachazo, He, and Yuan, tree-level amplitudes for massless particles in gauge theory and gravity can be expressed as rational functions of the Lorentz invariants ka ·

New formulas for amplitudes from higher-dimensional operators

A bstractIn this paper we study tree-level amplitudes from higher-dimensional operators, including F3 operator of gauge theory, and R2, R3 operators of gravity, in the Cachazo-He-Yuan formulation. As
...

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