Abstract
We extend and generalise the string corrections to the EM memory to the Type I superstring including spin effects. Very much as in the simpler bosonic string context, the relevant corrections are non-perturbative in α′, slowly decaying (as 1/R) at large distances and modulated in retarded time u=t−R. For spin N states in the first Regge trajectory they entail a sequence of N derivatives wrt u on the ‘parent’ N=0 amplitude. We also briefly discuss how to include loop effects, that broaden and shift the string resonances, and how to modify our analysis for macroscopic semi-classical quasi-BPS coherent states, whose collisions may lead to detectable string memory signals in viable Type I models.
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