scholarly journals Non-Kaehler heterotic string solutions with non-zero fluxes and non-constant dilaton

2014 ◽  
Vol 2014 (6) ◽  
Author(s):  
Marisa Fernández ◽  
Stefan Ivanov ◽  
Luis Ugarte ◽  
Dimiter Vassilev
Keyword(s):  
Heterotic String ◽  
Constant Dilaton

scholarly journals Non-Kaehler Heterotic String Compactifications with Non-Zero Fluxes and Constant Dilaton

2009 ◽  
Vol 288 (2) ◽  
pp. 677-697 ◽  
Author(s):  
Marisa Fernández ◽  
Stefan Ivanov ◽  
Luis Ugarte ◽  
Raquel Villacampa
Keyword(s):  
Heterotic String ◽  
String Compactifications ◽  
Constant Dilaton

scholarly journals Chern-Simons invariants and heterotic superpotentials

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Lara B. Anderson ◽  
James Gray ◽  
Andre Lukas ◽  
Juntao Wang
Keyword(s):  
Heterotic String ◽  
New Techniques ◽  
Vacuum Stability ◽  
Large Classes ◽  
Moduli Stabilization ◽  
String Compactifications ◽  
Key Features ◽  
Effective Theories ◽  
Chern Simons ◽  
Tangent Bundles

Abstract The superpotential in four-dimensional heterotic effective theories contains terms arising from holomorphic Chern-Simons invariants associated to the gauge and tangent bundles of the compactification geometry. These effects are crucial for a number of key features of the theory, including vacuum stability and moduli stabilization. Despite their importance, few tools exist in the literature to compute such effects in a given heterotic vacuum. In this work we present new techniques to explicitly determine holomorphic Chern-Simons invariants in heterotic string compactifications. The key technical ingredient in our computations are real bundle morphisms between the gauge and tangent bundles. We find that there are large classes of examples, beyond the standard embedding, where the Chern-Simons superpotential vanishes. We also provide explicit examples for non-flat bundles where it is non-vanishing and non-integer quantized, generalizing previous results for Wilson lines.

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.

Dilaton incoming vertices of the closed superstring and the heterotic string

1990 ◽  
Vol 245 (1) ◽  
pp. 31-34 ◽  
Author(s):  
H. Kataoka ◽  
Hikaru Sato
Keyword(s):  
Heterotic String

Heterotic string in background gauge fields

1988 ◽  
Vol 297 (3) ◽  
pp. 637-652 ◽  
Author(s):  
Ken-ji Hamada ◽  
Jiro Kodaira ◽  
Juichi Saito
Keyword(s):  
Heterotic String ◽  
Gauge Fields

scholarly journals Singularities in d = 4, N = 1 heterotic string vacua

1998 ◽  
Vol 68 (1-3) ◽  
pp. 319-326
Author(s):  
Matthias Klein ◽  
Jan Louis
Keyword(s):  
Heterotic String
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