21 February - 21 February
"High-Energy Behavior of Scattering Amplitudes in Theories with Purely Virtual Particles" by Dr. Marco Piva, University of Warsaw
Starts at 18:00
We are pleased to announce that the next ITMP seminar will be held on Wednesday, Mar 17, at 18:00 (Moscow time). The seminar will be arranged via Zoom.
Speaker: Dr. Vladimir Rosenhaus, Institute for Advanced Study, Princeton
Title: Chaotic scattering with a highly excited string
Abstract: Motivated by the desire to understand chaos in the S-matrix of string theory, we study tree level scattering amplitudes involving highly excited strings. While the amplitudes for scattering of light strings have been a hallmark of string theory since its early days, scattering of excited strings has been far less studied. Recent results on black hole chaos, combined with the correspondence principle between black holes and strings, suggest that the amplitudes have a rich structure. We review the procedure by which an excited string is formed by repeatedly scattering photons off of an initial tachyon. We compute the scattering amplitude of one arbitrary excited string decaying into two tachyons, and study its properties for a generic excited string. We find the amplitude is highly erratic as a function of both the precise excited string state and of the tachyon scattering angle.
If you want to join the seminar please register here before 15:00, March 17.
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