String Memories ... Lost and Regained

Abstract

We discuss stringy ${\alpha }^{\prime }$ corrections to the gravitational wave signal generated in the merging of two black holes. We model the merging with two BPS compact massive objects in the heterotic string, described by standard vertex operators or coherent states. Despite the expected cubic suppression in ${\alpha }^{\prime }$ w.r.t. the General Relativity result, at tree level the string corrections seem to leave a footprint or a memory on the gravitational wave signals within the sensitivity region of aLIGO/VIRGO and future interferometers. Including loop effects that broaden and destabilise the string resonances suggests a sort of lost stringy memory effect that can be regained through the analysis of the quasi normal modes in the ring-down phase.

36 pages

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• String Memories ... openly retold

Cited by in corpus (11)

• Black-hole microstate spectroscopy: ringdown, quasinormal modes, and echoes
• Chaotic scattering of highly excited strings
• Measure for chaotic scattering amplitudes
• Turning black-holes and D-branes inside out their photon-spheres
• Photon emission from an excited string
• The chaotic emergence of thermalization in highly excited string decays
• String Memories ... openly retold
• Warp factor and the gravitational wave spectrum
• Weak chaos and mixed dynamics in the string S-matrix
• Spinning-off stringy electro-magnetic memories
• Soft gravitational radiation from multi-body collisions