Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-06-03
JHEP 0311 (2003) 043
Physics
High Energy Physics
High Energy Physics - Theory
22 pages
Scientific paper
10.1088/1126-6708/2003/11/043
In this work we propose an exact solution of the c=1 Liouville model, i.e. of the world-sheet theory that describes the homogeneous decay of a closed string tachyon. Our expressions are obtained through careful extrapolation from the correlators of Liouville theory with c > 25. In the c=1 limit, we find two different theories which differ by the signature of Liouville field. The Euclidean limit coincides with the interacting c=1 theory that was constructed by Runkel and Watts as a limit of unitary minimal models. The couplings for the Lorentzian limit are new. In contrast to the behavior at c > 1, amplitudes in both c=1 models are non-analytic in the momenta and consequently they are not related by Wick rotation.
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