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We compute off-shell three-and four-tachyon amplitudes at tree level by using a prescription based on the requirement of projective invariance. In particular we show that the off-shell four tachyon amplitude can be put in the same form as the corresponding on-shell one, exhibiting therefore the same analyticity properties. This is shown both for the bosonic(More)
Study of the critical properties of the Quantum Hall Fluid in the framework of a dual statistical model. Abstract By using Renormalization Group methods we analyze the outcome of a recent proposal of describing the Quantum Hall fluid in terms of a dual plasma which embodies dyons as effective degrees of freedom. As a consequence the physical interpretation(More)
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