Gravity on-shell diagrams

Herrmann, Enrico; Trnka, Jaroslav

doi:10.1007/JHEP11(2016)136

Title: Gravity on-shell diagrams

Journal Article · Mon Nov 21 23:00:00 EST 2016 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/JHEP11(2016)136 · OSTI ID:1360112

Herrmann, Enrico ^[1]; Trnka, Jaroslav ^[2]

California Inst. of Technology (CalTech), Pasadena, CA (United States); University of California Davis
Univ. of California, Davis, CA (United States)

Here, we study on-shell diagrams for gravity theories with any number of super-symmetries and find a compact Grassmannian formula in terms of edge variables of the graphs. Unlike in gauge theory where the analogous form involves only d log-factors, in gravity there is a non-trivial numerator as well as higher degree poles in the edge variables. Based on the structure of the Grassmannian formula for N = 8 supergravity we conjecture that gravity loop amplitudes also possess similar properties. In particular, we find that there are only logarithmic singularities on cuts with finite loop momentum and that poles at infinity are present, in complete agreement with the conjecture presented in.

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Research Organization:: California Inst. of Technology (CalTech), Pasadena, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0011632

OSTI ID:: 1360112

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 11 Vol. 2016; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Positive Amplitudes In The Amplituhedron Arkani-Hamed, Nima; Hodges, Andrew; Trnka, Jaroslav arXiv https://doi.org/10.48550/arxiv.1412.8478	text	January 2014
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