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Universality properties of N=2 and N=1 Heterotic threshold corrections

In the framework of heterotic compactifications, we consider the one-loop corrections to the gauge couplings, which were shown to be free of any infra-red ambiguity. For a class of N=2 models, namely those that are obtained by toroidal compactification to four dimensions of generic six-dimensional N...

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Autores principales: Kiritsis, E., Kounnas, C., Petropoulos, P.M., Rizos, J.
Lenguaje:eng
Publicado: 1996
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(96)00550-0
http://cds.cern.ch/record/308353
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author Kiritsis, E.
Kounnas, C.
Petropoulos, P.M.
Rizos, J.
author_facet Kiritsis, E.
Kounnas, C.
Petropoulos, P.M.
Rizos, J.
author_sort Kiritsis, E.
collection CERN
description In the framework of heterotic compactifications, we consider the one-loop corrections to the gauge couplings, which were shown to be free of any infra-red ambiguity. For a class of N=2 models, namely those that are obtained by toroidal compactification to four dimensions of generic six-dimensional N=1 ground states, we give an explicit formula for the gauge-group independent thresholds, and show that these are equal within this class, as a consequence of an anomaly-cancellation constraint in six dimensions. We further use these results to compute the (N=2)-sector contributions to the thresholds of N=1 orbifolds. We then consider the full contribution of N=1 sectors to the gauge couplings which generically are expected to modify the unification picture. We compute such corrections in several models. We finally comment on the effect of such contributions to the issue of string unification.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
record_format invenio
spelling cern-3083532023-03-12T06:03:42Zdoi:10.1016/S0550-3213(96)00550-0http://cds.cern.ch/record/308353engKiritsis, E.Kounnas, C.Petropoulos, P.M.Rizos, J.Universality properties of N=2 and N=1 Heterotic threshold correctionsParticle Physics - TheoryIn the framework of heterotic compactifications, we consider the one-loop corrections to the gauge couplings, which were shown to be free of any infra-red ambiguity. For a class of N=2 models, namely those that are obtained by toroidal compactification to four dimensions of generic six-dimensional N=1 ground states, we give an explicit formula for the gauge-group independent thresholds, and show that these are equal within this class, as a consequence of an anomaly-cancellation constraint in six dimensions. We further use these results to compute the (N=2)-sector contributions to the thresholds of N=1 orbifolds. We then consider the full contribution of N=1 sectors to the gauge couplings which generically are expected to modify the unification picture. We compute such corrections in several models. We finally comment on the effect of such contributions to the issue of string unification.In the framework of heterotic compactifications, we consider the one-loop corrections to the gauge couplings, which were shown to be free of any infra-red ambiguity. For a class of N=2 models, namely those that are obtained by toroidal compactification to four dimensions of generic six-dimensional N=1 ground states, we give an explicit formula for the gauge-group independent thresholds, and show that these are equal within this class, as a consequence of an anomaly-cancellation constraint in six dimensions. We further use these results to compute the (N=2)-sector contributions to the thresholds of N=1 orbifolds. We then consider the full contribution of N=1 sectors to the gauge couplings which generically are expected to modify the unification picture. We compute such corrections in several models. We finally comment on the effect of such contributions to the issue of string unification.In the framework of heterotic compactifications, we consider the one-loop corrections to the gauge couplings, which were shown to be free of any infra-red ambiguity. For a class of N = 2 models, namely those that are obtained by toroidal compactification to four dimensions of generic six-dimensional N = 1 ground states, we give an explicit formula for the gauge-group-independent thresholds, and show that these are equal within this class, as a consequence of an anomaly cancellation constraint in six dimensions. We further use these results to compute the ( N = 2)-sector contributions to the thresholds of N = 1 orbifolds. We then consider the full contribution of N = 1 sectors to the gauge couplings, which generically are expected to modify the unification picture. We compute such corrections in several models. We finally comment on the effect of such contributions to the issue of string unification.hep-th/9608034CERN-TH-96-90SISSA-87-96-EPLPTENS-96-26CERN-TH-96-090LPT-ENS-96-26SISSA-87-96-EPoai:cds.cern.ch:3083531996-08-07
spellingShingle Particle Physics - Theory
Kiritsis, E.
Kounnas, C.
Petropoulos, P.M.
Rizos, J.
Universality properties of N=2 and N=1 Heterotic threshold corrections
title Universality properties of N=2 and N=1 Heterotic threshold corrections
title_full Universality properties of N=2 and N=1 Heterotic threshold corrections
title_fullStr Universality properties of N=2 and N=1 Heterotic threshold corrections
title_full_unstemmed Universality properties of N=2 and N=1 Heterotic threshold corrections
title_short Universality properties of N=2 and N=1 Heterotic threshold corrections
title_sort universality properties of n=2 and n=1 heterotic threshold corrections
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/S0550-3213(96)00550-0
http://cds.cern.ch/record/308353
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