Light-ray operators, detectors and gravitational event shapes
Abstract Light-ray operators naturally arise from integrating Einstein equations at null infinity along the light-cone time. We associate light-ray operators to physical detectors on the celestial sphere and we provide explicit expressions in perturbation theory for their hard modes using the steepe...
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Online Access: | https://doi.org/10.1007/JHEP05(2021)015 |
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doaj-0fc1ad86d42a4fc393c1d2429eb6e1de2021-05-09T11:06:54ZengSpringerOpenJournal of High Energy Physics1029-84792021-05-012021514810.1007/JHEP05(2021)015Light-ray operators, detectors and gravitational event shapesRiccardo Gonzo0Andrzej Pokraka1School of Mathematics & Hamilton Mathematics Institute, Trinity College DublinDepartment of Physics, McGill UniversityAbstract Light-ray operators naturally arise from integrating Einstein equations at null infinity along the light-cone time. We associate light-ray operators to physical detectors on the celestial sphere and we provide explicit expressions in perturbation theory for their hard modes using the steepest descent technique. We then study their algebra in generic 4-dimensional QFTs of massless particles with integer spin, comparing with complexified Cordova-Shao algebra. For the case of gravity, the Bondi news squared term provides an extension of the ANEC operator at infinity to a shear-inclusive ANEC, which as a quantum operator gives the energy of all quanta of radiation in a particular direction on the sky. We finally provide a direct connection of the action of the shear-inclusive ANEC with detector event shapes and we study infrared-safe gravitational wave event shapes produced in the scattering of massive compact objects, computing the energy flux at infinity in the classical limit at leading order in the soft expansion.https://doi.org/10.1007/JHEP05(2021)015Classical Theories of GravityScattering Amplitudes |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Riccardo Gonzo Andrzej Pokraka |
spellingShingle |
Riccardo Gonzo Andrzej Pokraka Light-ray operators, detectors and gravitational event shapes Journal of High Energy Physics Classical Theories of Gravity Scattering Amplitudes |
author_facet |
Riccardo Gonzo Andrzej Pokraka |
author_sort |
Riccardo Gonzo |
title |
Light-ray operators, detectors and gravitational event shapes |
title_short |
Light-ray operators, detectors and gravitational event shapes |
title_full |
Light-ray operators, detectors and gravitational event shapes |
title_fullStr |
Light-ray operators, detectors and gravitational event shapes |
title_full_unstemmed |
Light-ray operators, detectors and gravitational event shapes |
title_sort |
light-ray operators, detectors and gravitational event shapes |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2021-05-01 |
description |
Abstract Light-ray operators naturally arise from integrating Einstein equations at null infinity along the light-cone time. We associate light-ray operators to physical detectors on the celestial sphere and we provide explicit expressions in perturbation theory for their hard modes using the steepest descent technique. We then study their algebra in generic 4-dimensional QFTs of massless particles with integer spin, comparing with complexified Cordova-Shao algebra. For the case of gravity, the Bondi news squared term provides an extension of the ANEC operator at infinity to a shear-inclusive ANEC, which as a quantum operator gives the energy of all quanta of radiation in a particular direction on the sky. We finally provide a direct connection of the action of the shear-inclusive ANEC with detector event shapes and we study infrared-safe gravitational wave event shapes produced in the scattering of massive compact objects, computing the energy flux at infinity in the classical limit at leading order in the soft expansion. |
topic |
Classical Theories of Gravity Scattering Amplitudes |
url |
https://doi.org/10.1007/JHEP05(2021)015 |
work_keys_str_mv |
AT riccardogonzo lightrayoperatorsdetectorsandgravitationaleventshapes AT andrzejpokraka lightrayoperatorsdetectorsandgravitationaleventshapes |
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1714601036483657728 |