# KEK素粒子原子核研究所 　理論セミナー ( 中島爽太氏 )

分類 理論セミナー 2019/07/16（火）11:00 2019/07/16（火）12:00 研究本館1階　第1会議室 Exponentially suppressed cosmological constant with enhanced gauge symmetry in heterotic interpolating models 中島爽太氏（大阪市立大学） 英語/English 浅野侑磨/ 利用予定なし／0

## 概要

An interpolating model is a (D− d)-dimensional string model that continuously relates two D-dimensional string models. A few nine-dimensional interpolating models with two parameters are constructed and the massless spectra are studied by considering compactification of heterotic strings on a twisted circle with Wilson line. It is found that there are some conditions between radius R and Wilson line A under which the gauge symmetry is enhanced. In particular, when the gauge symmetry is enhanced to SO(18) \times SO(14), the cosmological constant is exponentially suppressed. We also construct a non-supersymmetric string model which is tachyon-free in all regions of moduli space and whose gauge symmetry involves E_8. This talk will be based on the work with H. Itoyama, arXiv: 1905.10745.

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