The Grassmannian and the twistor string: Connecting all trees in N = 4 SYM
We present a new, explicit formula for all tree-level amplitudes in N = 4 super Yang-Mills. The formula is written as a certain contour integral of the connected prescription of Witten's twistor string, expressed in link variables. A very simple deformation of the integrand gives directly the Grassmannian integrand proposed in [1] together with the explicit contour of integration. The integral is derived by iteratively adding particles to the Grassmannian integral, one particle at a time, and makes manifest both parity and soft limits. The formula is shown to be related to that of [2], and generalizes the results of [3, 4] for NMHV and N2MHV to all N(k-2)MHV tree amplitudes in N = 4 super Yang-Mills.
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/JHEP01(2011)038
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Work Title | The Grassmannian and the twistor string: Connecting all trees in N = 4 SYM |
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License | In Copyright (Rights Reserved) |
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Publication Date | January 11, 2011 |
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Deposited | January 17, 2024 |
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