scholarly journals Spontaneous $$ \mathcal{N} $$ = 2 → $$ \mathcal{N} $$ = 1 supersymmetry breaking in supergravity and type II string theory

2010 ◽  
Vol 2010 (2) ◽  
Author(s):  
Jan Louis ◽  
Paul Smyth ◽  
Hagen Triendl
Keyword(s):  
String Theory ◽  
Supersymmetry Breaking ◽  
Type Ii

scholarly journals SO(3)×U(1) Isometric Instantons with Non-Abelian Hair in Four-Dimensional String Theory

1997 ◽  
Vol 12 (25) ◽  
pp. 1847-1858
Author(s):  
Adrián R. Lugo
Keyword(s):  
String Theory ◽  
Type Ii ◽  
Dimensional Solution ◽  
Coset Model

We compute the exact effective string vacuum backgrounds of the level k=81/19 SU(2,1)/U(1) coset model. A compact SU(2) isometry present in this seven-dimensional solution allows one to interpret it after compactification as a four-dimensional non-Abelian SU(2) charged instanton with a singular submanifold and an SO(3) × U(1) isometry. The semiclassical backgrounds, solutions of the type II strings, present similar characteristics

scholarly journals Standard model from a supergravity model with a naturally small cosmological constant

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Shing Yan Li ◽  
Yu-Cheng Qiu ◽  
S.-H. Henry Tye
Keyword(s):  
String Theory ◽  
Standard Model ◽  
Cosmological Constant ◽  
Supersymmetry Breaking ◽  
Supersymmetric Standard Model ◽  
Degrees Of Freedom ◽  
Interaction Terms ◽  
Supersymmetric Version ◽  
The Standard Model ◽  
Linear Version

Abstract Guided by the naturalness criterion for an exponentially small cosmological constant, we present a string theory motivated 4-dimensional $$ \mathcal{N} $$ N = 1 non-linear supergravity model (or its linear version with a nilpotent superfield) with spontaneous supersymmetry breaking. The model encompasses the minimal supersymmetric standard model, the racetrack Kähler uplift, and the KKLT anti-D3-branes, and use the nilpotent superfield to project out the undesirable interaction terms as well as the unwanted degrees of freedom to end up with the standard model (not the supersymmetric version) of strong and electroweak interactions.

scholarly journals EXTREME DYONIC BLACK HOLES IN STRING THEORY

1996 ◽  
Vol 11 (09) ◽  
pp. 689-713 ◽  
Author(s):  
A.A. TSEYTLIN
Keyword(s):  
Black Holes ◽  
String Theory ◽  
Short Distance ◽  
Black Hole Entropy ◽  
Universal Relation ◽  
Type Ii ◽  
Statistical Entropy ◽  
Five Dimensions ◽  
Compact Dimension ◽  
Lower Dimensional

Supersymmetric extreme dyonic black holes of toroidally compactified heterotic or type-II string theory can be viewed as lower-dimensional images of solitonic strings wound around a compact dimension. We consider conformal sigma models which describe string configurations corresponding to various extreme dyonic black holes in four and five dimensions. These conformal models have regular short-distance region equivalent to a WZW theory with level proportional to magnetic charges. Arguments are presented suggesting a universal relation between the black hole entropy (area) and the statistical entropy of BPS-saturated oscillation states of solitonic string.

FIVEBRANE STRUCTURES

2009 ◽  
Vol 21 (10) ◽  
pp. 1197-1240 ◽  
Author(s):  
HISHAM SATI ◽  
URS SCHREIBER ◽  
JIM STASHEFF
Keyword(s):  
String Theory ◽  
Heterotic String ◽  
Target Space ◽  
Type Ii ◽  
Anomaly Cancellation ◽  
Heterotic String Theory ◽  
Dual Version ◽  
String Structure ◽  
Topological Obstructions ◽  
The One

We study the cohomological physics of fivebranes in type II and heterotic string theory. We give an interpretation of the one-loop term in type IIA, which involves the first and second Pontrjagin classes of spacetime, in terms of obstructions to having bundles with certain structure groups. Using a generalization of the Green–Schwarz anomaly cancellation in heterotic string theory which demands the target space to have a String structure, we observe that the "magnetic dual" version of the anomaly cancellation condition can be read as a higher analog of String structure, which we call Fivebrane structure. This involves lifts of orthogonal and unitary structures through higher connected covers which are not just 3- but even 7-connected. We discuss the topological obstructions to the existence of Fivebrane structures. The dual version of the anomaly cancellation points to a relation of string and Fivebrane structures under electric-magnetic duality.

scholarly journals THE SIGMA MODEL FORMULATION OF TYPE II STRING THEORY IN THE AdS5 × S5 BACKGROUNDS WITH RAMOND–RAMOND FLUX

2003 ◽  
Vol 18 (10) ◽  
pp. 1749-1760
Author(s):  
SATCHIDANANDA NAIK
Keyword(s):  
String Theory ◽  
Sigma Model ◽  
Type Ii ◽  
Model Formulation ◽  
Model Action

A sigma model action is constructed for the type II string in the AdS 5 × S5 backgrounds with Ramond–Ramond flux.

scholarly journals Supersymmetry breaking by type II seesaw assisted anomaly mediation

2008 ◽  
Vol 77 (11) ◽  
Author(s):  
R. N. Mohapatra ◽  
Nobuchika Okada ◽  
Hai-Bo Yu
Keyword(s):  
Supersymmetry Breaking ◽  
Type Ii ◽  
Anomaly Mediation

scholarly journals New vacua for type II string theory

1996 ◽  
Vol 388 (4) ◽  
pp. 736-742 ◽  
Author(s):  
Joseph Polchinski ◽  
Andrew Strominger
Keyword(s):  
String Theory ◽  
Type Ii

scholarly journals PROGRESS IN WEAKLY COUPLED STRING PHENOMENOLOGY

2002 ◽  
Vol 17 (supp01) ◽  
pp. 70-83
Author(s):  
MARY K. GAILLARD
Keyword(s):  
String Theory ◽  
Supersymmetry Breaking ◽  
Particle Physics ◽  
Specific Model ◽  
Heterotic String ◽  
Particle Spectrum ◽  
Heterotic String Theory ◽  
Hidden Sector ◽  
String Phenomenology ◽  
Weakly Coupled

The weakly coupled vacuum of E8 ⊗ E8 heterotic string theory remains an attractive scenario for particle physics. The particle spectrum and the issue of dilaton stabilization are reviewed. A specific model for hidden sector condensation and supersymmetry breaking, that respects known constraints from string theory, is described, and its phenomenological and cosmological implications are discussed.

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