<p>We study the recently introduced curve integral formalism that defines a new family of formulas for the scattering amplitudes of the colored scalar tr<i>ϕ</i><sup>3</sup> theory. We find that the curve integral manifests a very surprising fact about these amplitudes: the dependence on the number of particles, <i>n</i>, and the loop order, <i>L</i>, is effectively decoupled in these formulas. We derive the curve integrals at tree-level for all <i>n</i>. We then show that, for higher loop-order, it suffices to study the curve integrals for <i>L</i>-loop tadpole-like amplitudes, which have just one particle per color trace-factor. By combining these tadpole-like formulas with the tree-level results, we find formulas for the all <i>n</i> amplitudes at <i>L</i> loops. We illustrate this result by giving explicit curve integrals for all the amplitudes in the theory, including the non-planar amplitudes, through to two loops, for all <i>n</i>.</p>

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All loop scattering for all multiplicity

  • N. Arkani-Hamed,
  • H. Frost,
  • G. Salvatori,
  • P-G. Plamondon,
  • H. Thomas

摘要

We study the recently introduced curve integral formalism that defines a new family of formulas for the scattering amplitudes of the colored scalar trϕ3 theory. We find that the curve integral manifests a very surprising fact about these amplitudes: the dependence on the number of particles, n, and the loop order, L, is effectively decoupled in these formulas. We derive the curve integrals at tree-level for all n. We then show that, for higher loop-order, it suffices to study the curve integrals for L-loop tadpole-like amplitudes, which have just one particle per color trace-factor. By combining these tadpole-like formulas with the tree-level results, we find formulas for the all n amplitudes at L loops. We illustrate this result by giving explicit curve integrals for all the amplitudes in the theory, including the non-planar amplitudes, through to two loops, for all n.