Abstract
We show that the two-point tree level amplitude in string theory in flat space is given by the standard free particle expression.
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ArXiv ePrint: 1906.06051
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Erbin, H., Maldacena, J. & Skliros, D. Two-point string amplitudes. J. High Energ. Phys. 2019, 139 (2019). https://doi.org/10.1007/JHEP07(2019)139
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DOI: https://doi.org/10.1007/JHEP07(2019)139