Some remarks on tachyon action in 2d string theory
classification
✦ hep-th
keywords
actioncubicstringtachyontermstheoryalreadyamplitude
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We discuss the effective action of tachyon in the two dimensional string theory at tree level. We show that already starting from the cubic terms the action is nonlocal and the usually assumed simplest cubic term does not give the correct amplitude. Four point 1PI terms are also discussed.
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