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UV cancellations in gravity loop integrands

Enrico Herrmann
(
- SLAC
)
,
Jaroslav Trnka
(
- UC, Davis, QMAP
)

Aug 30, 2018

37 pages

Published in:

JHEP 02 (2019) 084

Published: Feb 14, 2019

e-Print:

1808.10446 [hep-th]

DOI:

10.1007/JHEP02(2019)084

View in:

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Abstract: (Springer)

In this work we explore the properties of four-dimensional gravity integrands at large loop momenta. This analysis can not be done directly for the full off-shell integrand but only becomes well-defined on cuts that allow us to unambiguously specify labels for the loop variables. The ultraviolet region of scattering amplitudes originates from poles at infinity of the loop integrands and we show that in gravity these integrands conceal a number of surprising features. In particular, certain poles at infinity are absent which requires a conspiracy between individual Feynman integrals contributing to the amplitude. We suspect that this non-trivial behavior is a consequence of yet-to-be found symmetry or a hidden property of gravity amplitudes.

Note:

37 pages, 3 tables, 45 figures

Scattering Amplitudes
Extended Supersymmetry
Supergravity Models
dimension: 4
gravitation
pole
scattering amplitude
Feynman graph
supergravity
ultraviolet

References(70)

Figures(0)

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