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Boundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3

We investigate certain fixed points in the boundary conformal field theory representation of type IIA D-branes on Gepner points of K3. They correspond geometrically to degenerate brane configurations, and physically lead to enhanced gauge symmetries on the world-volume. Non-abelian gauge groups aris...

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Autores principales: Fuchs, J., Kaste, P., Lerche, W., Lutken, C.A., Schweigert, C., Walcher, Johannes
Lenguaje:eng
Publicado: 2000
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(00)00779-3
http://cds.cern.ch/record/447655
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author Fuchs, J.
Kaste, P.
Lerche, W.
Lutken, C.A.
Schweigert, C.
Walcher, Johannes
author_facet Fuchs, J.
Kaste, P.
Lerche, W.
Lutken, C.A.
Schweigert, C.
Walcher, Johannes
author_sort Fuchs, J.
collection CERN
description We investigate certain fixed points in the boundary conformal field theory representation of type IIA D-branes on Gepner points of K3. They correspond geometrically to degenerate brane configurations, and physically lead to enhanced gauge symmetries on the world-volume. Non-abelian gauge groups arise if the stabilizer group of the fixed points is realized projectively, which is similar to D-branes on orbifolds with discrete torsion. Moreover, the fixed point boundary states can be resolved into several irreducible components. These correspond to bound states at threshold and can be viewed as (non-locally free) sub-sheaves of semi-stable sheaves. Thus, the BCFT fixed points appear to carry two-fold geometrical information: on the one hand they probe the boundary of the instanton moduli space on K3, on the other hand they probe discrete torsion in D-geometry.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2000
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spelling cern-4476552023-03-14T17:59:05Zdoi:10.1016/S0550-3213(00)00779-3http://cds.cern.ch/record/447655engFuchs, J.Kaste, P.Lerche, W.Lutken, C.A.Schweigert, C.Walcher, JohannesBoundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3Particle Physics - TheoryWe investigate certain fixed points in the boundary conformal field theory representation of type IIA D-branes on Gepner points of K3. They correspond geometrically to degenerate brane configurations, and physically lead to enhanced gauge symmetries on the world-volume. Non-abelian gauge groups arise if the stabilizer group of the fixed points is realized projectively, which is similar to D-branes on orbifolds with discrete torsion. Moreover, the fixed point boundary states can be resolved into several irreducible components. These correspond to bound states at threshold and can be viewed as (non-locally free) sub-sheaves of semi-stable sheaves. Thus, the BCFT fixed points appear to carry two-fold geometrical information: on the one hand they probe the boundary of the instanton moduli space on K3, on the other hand they probe discrete torsion in D-geometry.We investigate certain fixed points in the boundary conformal field theory representation of type IIA D-branes on Gepner points of K3. They correspond geometrically to degenerate brane configurations, and physically lead to enhanced gauge symmetries on the world-volume. Non-abelian gauge groups arise if the stabilizer group of the fixed points is realized projectively, which is similar to D-branes on orbifolds with discrete torsion. Moreover, the fixed point boundary states can be resolved into several irreducible components. These correspond to bound states at threshold and can be viewed as (non-locally free) sub-sheaves of semi-stable sheaves. Thus, the BCFT fixed points appear to carry two-fold geometrical information: on the one hand they probe the boundary of the instanton moduli space on K3, on the other hand they probe discrete torsion in D-geometry.hep-th/0007145CERN-TH-2000-164PAR-LPTHE-00-030ETH-TH-00-8CERN-TH-2000-164PAR-LPTHE-2000-30ETH-TH-2000-8oai:cds.cern.ch:4476552000-07-18
spellingShingle Particle Physics - Theory
Fuchs, J.
Kaste, P.
Lerche, W.
Lutken, C.A.
Schweigert, C.
Walcher, Johannes
Boundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3
title Boundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3
title_full Boundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3
title_fullStr Boundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3
title_full_unstemmed Boundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3
title_short Boundary Fixed Points, Enhanced Gauge Symmetry and Singular Bundles on K3
title_sort boundary fixed points, enhanced gauge symmetry and singular bundles on k3
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/S0550-3213(00)00779-3
http://cds.cern.ch/record/447655
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