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SUMMARY:A spin on gravitational radiation from the classical double copy
DTSTART;VALUE=DATE-TIME:20180112T060000Z
DTEND;VALUE=DATE-TIME:20180112T070000Z
DTSTAMP;VALUE=DATE-TIME:20180322T140721Z
UID:indico-event-6166@cern.ch
DESCRIPTION:The recent discovery of gravitational waves by LIGO gives new\
, pressing significance to the theoretical control of gravitational radiat
ion. We study a procedure to achieve this aim\, that is motivated by the B
CJ double copy correspondence between perturbative scattering amplitudes.
First\, we present a two-fold double copy for classical radiation from s
pinless sources. We compute\, to the leading order in perturbation theory\
, the scalar radiation generated by a system of bi-adjoint point charges c
oupled to a bi- adjoint scalar field. A set of color-to-kinematic substitu
tion rules transform the scalar radiation to Yang-Mills radiation from a s
ystem of adjoint color charges\, while a second application of the same r
ules gives radiation in a gravitational theory with point masses. Next\, w
e extend the classical double copy to spinning sources\, thus bringing it
closer to the astrophysically relevant case of compact binaries. Here\, we
compute\, to linear order in spin\, Yang-Mills radiation generated by a s
ystem of spinning color charges with chromomagnetic spin dipole couplings.
The color-to- kinematic substitution rules then yield radiation in a theo
ry with spinning sources coupled to the graviton\, dilaton and a 2-form ga
uge field. If this classical double copy correspondence persists to higher
orders in perturbation theory\, it suggests the possibility of vastly sim
plifying the calculation of gravitational radiation\, in particular\, that
from colliding compact objects.\n\nhttps://indico.tifr.res.in/indico/conf
erenceDisplay.py?confId=6166
LOCATION: A 269
URL:https://indico.tifr.res.in/indico/conferenceDisplay.py?confId=6166
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