Topological Masses From Broken Supersymmetry

We develop a formalism for computing one-loop gravitational corrections to the effective action of D-branes. In particular, we study bulk to brane mediation of supersymmetry breaking in models where supersymmetry is broken at the tree-level in the closed string sector (bulk) by Scherk-Schwarz bounda...

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Autores principales: Antoniadis, Ignatios, Taylor, Tomasz R.
Lenguaje:eng
Publicado: 2004
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.nuclphysb.2004.06.025
http://cds.cern.ch/record/727677
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author Antoniadis, Ignatios
Taylor, Tomasz R.
author_facet Antoniadis, Ignatios
Taylor, Tomasz R.
author_sort Antoniadis, Ignatios
collection CERN
description We develop a formalism for computing one-loop gravitational corrections to the effective action of D-branes. In particular, we study bulk to brane mediation of supersymmetry breaking in models where supersymmetry is broken at the tree-level in the closed string sector (bulk) by Scherk-Schwarz boundary conditions, while it is realized on a collection of D-branes in a linear or non-linear way. We compute the gravitational corrections to the fermion masses $m_{1/2}$ (gauginos or goldstino) induced from the exchange of closed strings, which are non-vanishing for world-sheets with Euler characteristic -1 (``genus 3/2'') due to a string diagram with one handle and one hole. We show that the corrections have a topological origin and that in general, for a small gravitino mass, the induced mass behaves as $m_{1/2}\propto g^4 m_{3/2}$, with $g$ the gauge coupling. In generic orbifold compactifications however, this leading term vanishes as a consequence of cancellations caused by discrete symmetries, and the remainder is exponentially suppressed by a factor of $\exp(-1/\alpha'm^2_{3/2})$.
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spelling cern-7276772023-03-14T20:38:18Zdoi:10.1016/j.nuclphysb.2004.06.025http://cds.cern.ch/record/727677engAntoniadis, IgnatiosTaylor, Tomasz R.Topological Masses From Broken SupersymmetryParticle Physics - TheoryWe develop a formalism for computing one-loop gravitational corrections to the effective action of D-branes. In particular, we study bulk to brane mediation of supersymmetry breaking in models where supersymmetry is broken at the tree-level in the closed string sector (bulk) by Scherk-Schwarz boundary conditions, while it is realized on a collection of D-branes in a linear or non-linear way. We compute the gravitational corrections to the fermion masses $m_{1/2}$ (gauginos or goldstino) induced from the exchange of closed strings, which are non-vanishing for world-sheets with Euler characteristic -1 (``genus 3/2'') due to a string diagram with one handle and one hole. We show that the corrections have a topological origin and that in general, for a small gravitino mass, the induced mass behaves as $m_{1/2}\propto g^4 m_{3/2}$, with $g$ the gauge coupling. In generic orbifold compactifications however, this leading term vanishes as a consequence of cancellations caused by discrete symmetries, and the remainder is exponentially suppressed by a factor of $\exp(-1/\alpha'm^2_{3/2})$.We develop a formalism for computing one-loop gravitational corrections to the effective action of D-branes. In particular, we study bulk to brane mediation of supersymmetry breaking in models where supersymmetry is broken at the tree-level in the closed string sector (bulk) by Scherk–Schwarz boundary conditions, while it is realized on a collection of D-branes in a linear or non-linear way. We compute the gravitational corrections to the fermion masses m 1/2 (gauginos or goldstino) induced from the exchange of closed strings, which are non-vanishing for world-sheets with Euler characteristic −1 (“genus 3/2”) due to a string diagram with one handle and one hole. We show that the corrections have a topological origin and that in general, for a small gravitino mass, the induced mass behaves as m 1/2 ∝ g 4 m 3/2 , with g the gauge coupling. In generic orbifold compactifications however, this leading term vanishes as a consequence of cancellations caused by discrete symmetries, and the remainder is exponentially suppressed by a factor of exp(−1/ α ′ m 2 3/2 ).We develop a formalism for computing one-loop gravitational corrections to the effective action of D-branes. In particular, we study bulk to brane mediation of supersymmetry breaking in models where supersymmetry is broken at the tree-level in the closed string sector (bulk) by Scherk-Schwarz boundary conditions, while it is realized on a collection of D-branes in a linear or non-linear way. We compute the gravitational corrections to the fermion masses $m_{1/2}$ (gauginos or goldstino) induced from the exchange of closed strings, which are non-vanishing for world-sheets with Euler characteristic -1 (``genus 3/2'') due to a string diagram with one handle and one hole. We show that the corrections have a topological origin and that in general, for a small gravitino mass, the induced mass behaves as $m_{1/2}\propto g^4 m_{3/2}$, with $g$ the gauge coupling. In generic orbifold compactifications however, this leading term vanishes as a consequence of cancellations caused by discrete symmetries, and the remainder is exponentially suppressed by a factor of $\exp(-1/\alpha'm^2_{3/2})$.hep-th/0403293CERN-PH-TH-2004-060CERN-PH-TH-2004-60CERN-PH-TH-2004-060oai:cds.cern.ch:7276772004-03-31
spellingShingle Particle Physics - Theory
Antoniadis, Ignatios
Taylor, Tomasz R.
Topological Masses From Broken Supersymmetry
title Topological Masses From Broken Supersymmetry
title_full Topological Masses From Broken Supersymmetry
title_fullStr Topological Masses From Broken Supersymmetry
title_full_unstemmed Topological Masses From Broken Supersymmetry
title_short Topological Masses From Broken Supersymmetry
title_sort topological masses from broken supersymmetry
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/j.nuclphysb.2004.06.025
http://cds.cern.ch/record/727677
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