Lomonosov Moscow State University

ITMP Seminar "High energy scattering of strings in AdS"

ITMP Seminar
13 May 2024

Dear Colleagues,

We are pleased to announce that the next ITMP seminar will be held on Wednesday, May 15, 18:00 (Moscow time). It will be organised via Zoom. 

Speaker: Maria Nocchi, University of Oxford

Title: High energy scattering of strings in AdS

Abstract: When studying string scattering in flat space, we rely on a world-sheet description, yet extending this to curved backgrounds poses nontrivial challenges. In this talk, we discuss how to compute string amplitudes on AdS as a curvature expansion around flat space and emphasize the pivotal role of single valuedness, akin to its significance in flat space. Specifically, we focus on the AdS Virasoro-Shapiro amplitude and start from its recent representation as a world-sheet integral. We take the next step towards a world-sheet theory in AdS by investigating the high-energy regime. As in flat space, this is accessed by saddle point techniques. Moreover, the path integral representation for the amplitude is dominated by a classical solution. Our algorithm computes AdS classical solutions to arbitrary order in a 1/R expansion, where R is the radius of AdS, in terms of single-valued multiple polylogarithms whose letters are the locations of the punctures. Finally, we show that AdS curvature corrections exponentiate in this limit!

If you want to join the seminar please register here before 16:00, May 15 here.

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