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On the high energy scattering and absorption of strings by D-branes

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If you have a question about this talk, please contact Nima Doroud .

I will first review how the dynamics of a closed string in the presence of a stack of parallel D-branes is neatly described, in a suitable range of parameters, by an eikonal operator that encodes both classical gravity effects (deflection angle, time delay) and stringy corrections (tidal excitations of the string).

I will then focus on the region of parameters where the absorption of the closed string becomes the dominant effect. I will derive a compact and explicit expression for the quantum state of the open string created at tree level on the branes worldvolume. I will discuss some properties of this state (angular momentum, longitudinal and transverse extension) and compare them with the properties of the corresponding semiclassical solution that describes the closed-open transition.

This talk is part of the Quantum Fields and Strings Seminars series.

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