期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP01(2022)127
关键词
D-branes; Superstring Vacua; Superstrings and Heterotic Strings; Supersymmetry Breaking
资金
- FWF [P 30265]
- Alexander von Humboldt Foundation
- University of Liverpool [ULG10047]
- NSF [PHY-2013988]
This article investigates the finite perturbative corrections in non-supersymmetric strings and discusses their physical and mathematical properties through the interplay between modular invariance and misaligned supersymmetry.
In this article we show that finite perturbative corrections in non-supersymmetric strings can be understood via an interplay between modular invariance and misaligned supersymmetry. While modular invariance is known to be crucial in closed-string models, its presence and role for open strings is more subtle. Nevertheless, we argue that it leads to cancellations in physical quantities such as the one-loop cosmological constant and prevents them from diverging. In particular, we show that if the sector-averaged number of states does not grow exponentially, as predicted by misaligned supersymmetry, all exponential divergences in the one-loop cosmological constant cancel out as well. To account for the absence of power-law divergences, instead, we need to resort to the modular structure of the partition function. We finally comment on the presence of misaligned supersymmetry in the known 10-dimensional tachyon-free non-supersymmetric string theories.
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