BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Gravity as the square of gauge theory
DTSTART;VALUE=DATE-TIME:20210301T170000Z
DTEND;VALUE=DATE-TIME:20210301T180000Z
DTSTAMP;VALUE=DATE-TIME:20220518T221525Z
UID:indico-contribution-58@events.perimeterinstitute.ca
DESCRIPTION:Speakers: Leron Borsten (Imperial College London)\nCan gravity
\, in certain regards\, be the `product' of two gauge theories\, such as t
hose appearing in the Standard Model? I will begin by reviewing the Bern
—Carrasco—Johansson colour—kinematics duality conjecture\, which imp
lies that one can write the scattering amplitudes of Einstein-Hilbert grav
ity (coupled to a Kalb-Ramond 2-form and dilaton scalar) as the double cop
y of Yang—Mills amplitudes. Although the colour—kinematics duality\, a
nd therefore the double copy\, was quickly established at the tree level\,
it remains a longstanding open problem at the loop level\, despite highly
non-trivial explicit examples. \n\nI will then describe how one can take
this `gravity = gauge x gauge' amplitude paradigm `off-shell’ as a prod
uct of spacetime fields: the Yang-Mills BRST-Lagrangian itself double copi
es into perturbatively quantised Einstein-Hilbert gravity coupled to a Kal
b-Ramond 2-form and dilaton\, establishing the validity of the double copy
to all orders\, tree and loop. I will end by briefly discussing the homot
opy algebras underpinning this result and the inclusion of supersymmetry\,
which reveals fascinating octonionic structures (some very well-known\, o
thers completely new) that will be the subject of Mia Hughes's talk in the
following week.\n\nhttps://events.perimeterinstitute.ca/event/5/contribut
ions/58/
LOCATION:
URL:https://events.perimeterinstitute.ca/event/5/contributions/58/
END:VEVENT
END:VCALENDAR