scholarly journals Observational signature of a near-extremal Kerr-Sen black hole in the heterotic string theory

2020 ◽  
Vol 101 (2) ◽  
Author(s):  
Minyong Guo ◽  
Shupeng Song ◽  
Haopeng Yan
Keyword(s):  
Black Hole ◽  
String Theory ◽  
Heterotic String ◽  
Heterotic String Theory ◽  
Observational Signature

scholarly journals Dyonic black hole in heterotic string theory

1997 ◽  
Vol 484 (1-2) ◽  
pp. 223-244 ◽  
Author(s):  
Dileep P. Jatkar ◽  
Sudipta Mukherji ◽  
Sudhakar Panda
Keyword(s):  
Black Hole ◽  
String Theory ◽  
Heterotic String ◽  
Heterotic String Theory

scholarly journals Hierarchical structure of physical Yukawa couplings from matter field Kähler metric

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Keiya Ishiguro ◽  
Tatsuo Kobayashi ◽  
Hajime Otsuka
Keyword(s):  
String Theory ◽  
Hierarchical Structure ◽  
Matter Field ◽  
Heterotic String ◽  
Heterotic String Theory ◽  
Kähler Metric ◽  
Yukawa Couplings ◽  
String Compactifications ◽  
Kahler Metric ◽  
Matter Fields

Abstract We study the impacts of matter field Kähler metric on physical Yukawa couplings in string compactifications. Since the Kähler metric is non-trivial in general, the kinetic mixing of matter fields opens a new avenue for realizing a hierarchical structure of physical Yukawa couplings, even when holomorphic Yukawa couplings have the trivial structure. The hierarchical Yukawa couplings are demonstrated by couplings of pure untwisted modes on toroidal orbifolds and their resolutions in the context of heterotic string theory with standard embedding. Also, we study the hierarchical couplings among untwisted and twisted modes on resolved orbifolds.

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