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SUMMARY:!!!NOTE UNSUAL TIME!!! Collider physics tools for classical gravit
ational wave observables
DTSTART;VALUE=DATE-TIME:20220202T160000Z
DTEND;VALUE=DATE-TIME:20220202T170000Z
DTSTAMP;VALUE=DATE-TIME:20220524T221300Z
UID:indico-event-33219@indico.desy.de
DESCRIPTION:Speakers: Enrico Herrmann (UC Los Angeles)\n\nIn this talk\, I
will give an overview about some of the exciting recent advances in the e
xtraction of classical precision observables for the relativistic two-body
problem in General Relativity. This timely computational progress is rel
evant to both present and future gravitational wave observatories. Despite
various available avenues of attack\, some of which are pioneered at DESY
\, I will mostly concentrate on the framework devised by Kosower\, Maybee\
, and O'Connell (KMOC) which expresses classical observables in terms of
scattering amplitudes. I will highlight how collider physics ideas\, such
as generalized unitarity\, integration-by-parts relations\, the method of
regions\, reverse unitarity\, and differential equations allow us to comp
ute for example the scattering angle and the radiated energy for the coll
ision of two black holes to order G^3 (a 2-loop computation). I will also
briefly explore the generalization of these ideas to other classical obse
rvables\, such as the radiated angular momentum\, as well as to different
classes of theories (including scalar QED) to explore certain universal b
ehavior in the classical limit.\n\njoin the colloquium here: Zoom Link\n\n
Meeting ID: 831 0011 0493 \nPasscode: 493481 \n\nhttps://indico.desy.de/ev
ent/33219/
URL:https://indico.desy.de/event/33219/
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