CLOSED STRING COUPLINGS WITH MODULAR PROPERTIES
Sep 30, 198824 pages
Published in:
- Nucl.Phys.B 317 (1989) 147-170
- Published: 1989
Report number:
- MIT-CTP-1634
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Abstract: (Elsevier)
Closed string couplings that give direct constructions of the fundamental region of the modular group are obtained. They arise from Riemann surfaces associated with functions that map strips into a given number of fundamental regions of the group of anharmonic ratios. A Prym differential underlies a tadpole-like graph giving three copies of the modular region.- MODEL: STRING
- INVARIANCE: REPARAMETRIZATION
- COUPLING: STRING
- STRING: COUPLING
- FIELD THEORY: STRING
- MATHEMATICAL METHODS: Riemann surface
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