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SUMMARY:Gim Seng Ng: Subleading Eikonal\, AdS/CFT and Double Stress Tensor
s
DTSTART;VALUE=DATE-TIME:20191101T100000Z
DTEND;VALUE=DATE-TIME:20191101T120000Z
DTSTAMP;VALUE=DATE-TIME:20200712T143243Z
UID:indico-event-859734@indico.cern.ch
DESCRIPTION:Abstract:\n\nThe eikonal phase which determines the Regge limi
t of the gravitational scattering amplitude of a light particle off a heav
y one in Minkowski spacetimes admits an expansion in the ratio of the Schw
arzschild radius of the heavy particle to the impact parameter. Such an ei
konal phase in AdS spacetimes of any dimensionality has been computed to a
ll orders and reduces to the corresponding Minkowski result when both the
impact parameter and the Schwarzschild radius are much smaller than the Ad
S radius. The leading term in the AdS eikonal phase can be reproduced in t
he dual CFT by a single stress tensor conformal block\, but the subleading
term is a result of an infinite sum of the double stress tensor contribut
ions. We provide a closed form expression for the OPE coefficients of the
leading twist double stress tensors in four spacetime dimensions and perfo
rm the sum to compute the corresponding lightcone behavior of a heavy-heav
y-light-light CFT correlator. The resulting compact expression passes a fe
w nontrivial independent checks. In particular\, it agrees with the sublea
ding eikonal phase at large impact parameter.\n\nhttps://indico.cern.ch/ev
ent/859734/
LOCATION:CERN 4/3-006 - TH Conference Room
URL:https://indico.cern.ch/event/859734/
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