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Paper   IPM / Physic / 6648
School of Physics
  Title:   Zamalochikov's C-Theorem and the Logarithmic Conformal Field Theory
1.  M.R. Rahimi Tabar
2.  S. Rouhani
  Status:   Published
  Journal: Phys. Lett. B
  No.:  53
  Vol.:  431
  Year:  1998
  Pages:   85-89
  Supported by:  IPM
We consider perturbation of a conformal field theory by a pair of relevant logarithmic operators and calculate the beta function up to two loops. We observe that the beta function can not be derived from a potential. Thus the renormalization group trajectories are not always along decreasing values of the central charge. However there exists a domain of structure constants in which the c-theorem still holds.

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