The Orbifolds of Permutation-type as Physical String Systems at Multiples of C = 26 Ii. the Twisted Brst Systems Ofˆc = 52 Matter

This is the second in a series of papers which consider the orbifolds of permutation-type as candidates for new physical string systems at higher central charge. In the first paper, I worked out the extended actions of the twisted sectors of those orbifolds – which exhibit new permutation-twisted world-sheet gravities and correspondingly extended diffeomorphism groups. In this paper I begin the study of these systems as operator string theories, limiting the discussion for simplicity to the strings with ĉ = 52 matter (which are those governed by Z2-twisted permutation gravity). In particular, I present here a construction of the twisted reparametrization ghosts and new twisted BRST systems of all ĉ = 52 strings. The twisted BRST systems also imply new extended physical state conditions, whose analysis for individual ĉ = 52 strings is deferred to the next paper of the series. [email protected]