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arXiv · 2506.23974

Classical string profile for a class of DDF amplitudes

Diptarka Das·Santanu Mandal·Anurag Sarkar
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Abstract

In the critical bosonic string theory, we explicitly evaluate the three point scattering amplitude at tree level, of a photon with two massive higher spins. The massive excitations belong to states of the form $A_{-r_1}^{s_1} A_{-r_2}^{s_2}$ where $A_{-n}$ is a DDF creation operator. Next, we take the infinite ``spin'' limit to arrive at the classical string dynamics. We find a rotating ``floppy'' string lying mostly on a plane which develops a transverse kink.

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Diptarka Das, Santanu Mandal, Anurag Sarkar. 2025-06-30. Classical string profile for a class of DDF amplitudes. https://doi.org/10.1016/j.physletb.2025.139971

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