H Chakir et al 1997 Class. Quantum Grav. 14 2049 doi:10.1088/0264-9381/14/8/007
H Chakir, A Elfallah and E H Saidi
Show affiliationsWe extend the work of Argyres and Tye (1991 Phys. Rev. Lett. 67 3339) on fractional superstrings established for
to higher-dimensional parafermionic cosets. We derive the generic formula for the critical spacetime dimensions and the corresponding critical central charges for the more general
coset
We also show that only the cosets
and
allow one to build critical (N,k)-string models. Other features are also discussed.
81T30 String and superstring theories; other extended objects (e.g., branes) (See also 83E30)
Issue 8 (August 1997)
Received 16 August 1996, in final form 30 January 1997
H Chakir et al 1997 Class. Quantum Grav. 14 2049
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