Brane Supersymmetry Breaking and the Cosmological Constant: Open Problems

It has recently been argued that non--BPS brane world scenarios can reproduce the small value of the cosmological constant that seems to have been measured. Objections against this proposal are discussed and necessary (but not sufficient) conditions are stated under which it may work. At least n=2 e...

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Detalles Bibliográficos
Autor principal: Schmidhuber, Christof
Lenguaje:eng
Publicado: 2001
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(01)00538-7
http://cds.cern.ch/record/496260
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author Schmidhuber, Christof
author_facet Schmidhuber, Christof
author_sort Schmidhuber, Christof
collection CERN
description It has recently been argued that non--BPS brane world scenarios can reproduce the small value of the cosmological constant that seems to have been measured. Objections against this proposal are discussed and necessary (but not sufficient) conditions are stated under which it may work. At least n=2 extra dimensions are needed. Also, the mass matrix in the supergravity sector must satisfy $Str M^2=0$. Moreover, the proposal can be ruled out experimentally if Newton's constant remains unchanged down to scales of 10 micrometers. If, on the other hand, such a ``running Newton constant'' is observed, it could provide crucial experimental input for superstring phenomenology.
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spelling cern-4962602023-03-14T20:03:37Zdoi:10.1016/S0550-3213(01)00538-7http://cds.cern.ch/record/496260engSchmidhuber, ChristofBrane Supersymmetry Breaking and the Cosmological Constant: Open ProblemsParticle Physics - TheoryIt has recently been argued that non--BPS brane world scenarios can reproduce the small value of the cosmological constant that seems to have been measured. Objections against this proposal are discussed and necessary (but not sufficient) conditions are stated under which it may work. At least n=2 extra dimensions are needed. Also, the mass matrix in the supergravity sector must satisfy $Str M^2=0$. Moreover, the proposal can be ruled out experimentally if Newton's constant remains unchanged down to scales of 10 micrometers. If, on the other hand, such a ``running Newton constant'' is observed, it could provide crucial experimental input for superstring phenomenology.It has recently been argued that non--BPS brane world scenarios can reproduce the small value of the cosmological constant that seems to have been measured. Objections against this proposal are discussed and necessary (but not sufficient) conditions are stated under which it may work. At least n=2 extra dimensions are needed. Also, the mass matrix in the supergravity sector must satisfy $Str M^2=0$. Moreover, the proposal can be ruled out experimentally if Newton's constant remains unchanged down to scales of 10 micrometers. If, on the other hand, such a ``running Newton constant'' is observed, it could provide crucial experimental input for superstring phenomenology.It has recently been argued that non-BPS brane world scenarios can reproduce the small value of the cosmological constant that seems to have been measured. Objections against this proposal are discussed and necessary (but not sufficient) conditions are stated under which it may work. At least n =2 extra dimensions are needed. Also, the mass matrix in the supergravity sector must satisfy Str M 2 =0 . Moreover, the proposal can be ruled out experimentally if Newton's constant remains unchanged down to scales of 10 μm. If, on the other hand, such a “running Newton constant” is observed, it could provide crucial experimental input for superstring phenomenology.hep-th/0104131CERN-TH-2001-087CERN-TH-2001-087oai:cds.cern.ch:4962602001-04-16
spellingShingle Particle Physics - Theory
Schmidhuber, Christof
Brane Supersymmetry Breaking and the Cosmological Constant: Open Problems
title Brane Supersymmetry Breaking and the Cosmological Constant: Open Problems
title_full Brane Supersymmetry Breaking and the Cosmological Constant: Open Problems
title_fullStr Brane Supersymmetry Breaking and the Cosmological Constant: Open Problems
title_full_unstemmed Brane Supersymmetry Breaking and the Cosmological Constant: Open Problems
title_short Brane Supersymmetry Breaking and the Cosmological Constant: Open Problems
title_sort brane supersymmetry breaking and the cosmological constant: open problems
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/S0550-3213(01)00538-7
http://cds.cern.ch/record/496260
work_keys_str_mv AT schmidhuberchristof branesupersymmetrybreakingandthecosmologicalconstantopenproblems

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