ar X iv : h ep - t h / 95 05 03 3 v 1 5 M ay 1 99 5 2 - d Gravity as a Limit of the SL ( 2 , R ) Black Hole

ar X iv : h ep - t h / 97 05 19 1 v 1 2 5 M ay 1 99 7 On calculation of the off - shell renormalization functions in the R 2 – gravity

A new way how to calculate the off-shell renormalization functions within the R 2-gravity has been proposed. The one-loop renormaliza-tion group equations in the approach suggested have been constructed. The behaviour of effective potential for an massless scalar field interacting with the quantum gravitational field has been analyzed in this approach.

ar X iv : h ep - t h / 95 10 12 3 v 1 1 8 O ct 1 99 5 INJE – TP – 95 – 3 An infinite number of potentials surrounding 2 d black hole

We found an infinite number of potentials surrounding 2d black hole. According to the transmission T and reflection R coefficients for scattering of string fields off 2d black hole, we can classify an infinite number of potentials into three : graviton-dilaton, tachyon and the other types. We suggest that the discrete states from all the Virasoro levels be candidates for new potentials (modes).

ar X iv : h ep - t h / 95 05 18 3 v 1 3 1 M ay 1 99 5

Using the N = 4 topological reformulation of N = 2 strings, we compute all loop partition function for special compactifications of N = 2 strings as a function of target moduli. We also reinterpret N = 4 topological amplitudes in terms of slightly modified N = 2 topological amplitudes. We present some preliminary evidence for the conjecture that N = 2 strings is the large N limit of Holomorphic...

ar X iv : h ep - t h / 95 05 05 9 v 1 1 0 M ay 1 99 5 orthochronous The Conformal Spin and Statistics Theorem

ar X iv : h ep - p h / 04 05 03 9 v 1 5 M ay 2 00 4 η , η ′ → π + π − γ with coupled channels