Instanton-induced closed-string amplitudes in minimal superstring theory at subleading order
- 1International Centre for Theoretical Sciences
- 2University of Pennsylvania
Abstract
A bstract : We compute the disk one-point function, the disk two-point function, and the annulus one-point function of the cosmological constant operator in the type 0A and type 0B minimal superstring theories with (1, 1) ZZ instanton boundary conditions. The moduli-space integrals appearing in the disk two-point function and the annulus one-point function have divergences associated with open-string-channel degenerations, which must be regulated using open-closed string field theory. The definition of the string field theory interaction vertices requires a choice of locations for the picture-changing operators, which we specify in detail. After carefully taking into account all contributions, including those from vertical integration, we find that the results precisely match the expectations from DDK-KPZ scaling. Our technical results on the detailed construction of interaction vertices are a first step toward understanding the analogous quantities in the ten-dimensional type IIB superstring, where one also needs to understand how to treat the bosonic and fermionic collective coordinates at subleading order.
Related
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BibTeX
@article{barman2026instantoninduced,
title = {{Instanton-induced closed-string amplitudes in minimal superstring theory at subleading order}},
author = {Jyotirmoy Barman and Rishabh Kaushik and Raghu Mahajan and Chitraang Murdia and Ashoke Sen},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)209},
url = {https://link.springer.com/article/10.1007/JHEP10(2026)209},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Instanton-induced closed-string amplitudes in minimal superstring theory at subleading order
AU - Jyotirmoy Barman
AU - Rishabh Kaushik
AU - Raghu Mahajan
AU - Chitraang Murdia
AU - Ashoke Sen
PY - 2026
DA - 2026/10/21
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)209
UR - https://link.springer.com/article/10.1007/JHEP10(2026)209
AB - A bstract : We compute the disk one-point function, the disk two-point function, and the annulus one-point function of the cosmological constant operator in the type 0A and type 0B minimal superstring theories with (1, 1) ZZ instanton boundary conditions. The moduli-space integrals appearing in the disk two-point function and the annulus one-point function have divergences associated with open-string-channel degenerations, which must be regulated using open-closed string field theory. The definition of the string field theory interaction vertices requires a choice of locations for the picture-changing operators, which we specify in detail. After carefully taking into account all contributions, including those from vertical integration, we find that the results precisely match the expectations from DDK-KPZ scaling. Our technical results on the detailed construction of interaction vertices are a first step toward understanding the analogous quantities in the ten-dimensional type IIB superstring, where one also needs to understand how to treat the bosonic and fermionic collective coordinates at subleading order.
SN - 1029-8479
ER -