ar X iv : h ep - t h / 92 04 05 3 v 2 1 7 A pr 1 99 2 PUPT - 1314 Extra States and Symmetries in D < 2 Closed String Theory

نویسندگان

  • Shamit Kachru
  • Joseph Henry
چکیده

We show that there is (p − 1)(p − 1) dimensional semi-relative BRST cohomology at each non-positive ghost number in the (p, p) minimal conformal field theory coupled to two dimensional quantum gravity. These closed string states are related to currents and symmetry charges of ‘exotic’ ghost number. We investigate the symmetry structure generated by the most conventional currents (those of vanishing total ghost number), and make a conjecture about the extended algebra which results from incorporating the currents at negative ghost numbers.

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تاریخ انتشار 1992