Abstract
It is shown that the truncated Wightman functions of three or more string-localized fields vanish if they are solutions of a Klein-Gordon equation in each variable. As an application it is shown that a string field is a free field if its two-point functions are those of a free field. Another application to perturbation theory is pointed out.
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Communicated by K. Osterwalder
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Steinmann, O. A Jost-Schroer theorem for string fields. Commun.Math. Phys. 87, 259–264 (1982). https://doi.org/10.1007/BF01218564
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DOI: https://doi.org/10.1007/BF01218564