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Superpotential de-s...
Superpotential de-sequestering in string models
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- Berg, Marcus, 1973- (author)
- Stockholms universitet,Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013),Stockholm University,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Karlstad University, Sweden
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- Conlon, Joseph (author)
- Oxford University, UK
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- Marsh, David (author)
- Cornell University, USA
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- Witkowski, Lukas (author)
- Oxford University, UK
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(creator_code:org_t)
- Berlin : Springer, 2013
- 2013
- English.
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In: Journal of High Energy Physics (JHEP). - Berlin : Springer. - 1126-6708 .- 1029-8479. ; 18:February
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Abstract
Subject headings
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- Non-perturbative superpotential cross-couplings between visible sector matter and Kähler moduli can lead to significant flavour-changing neutral currents in compactifications of type IIB string theory. Here, we compute corrections to Yukawa couplings in orbifold models with chiral matter localised on D3-branes and non-perturbative effects on distant D7-branes. By evaluating a threshold correction to the D7-brane gauge coupling, we determine conditions under which the non-perturbative corrections to the Yukawa couplings appear. The flavour structure of the induced Yukawa coupling generically fails to be aligned with the tree-level flavour structure. We check our results by also evaluating a correlation function of two D7-brane gauginos and a D3-brane Yukawa coupling. Finally, by calculating a string amplitude between n hidden scalars and visible matter we show how non-vanishing vacuum expectation values of distant D7-brane scalars, if present, may correct visible Yukawa couplings with a flavour structure that differs from the tree-level flavour structure.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Supersymmetry Breaking
- Compactification and String Models
- Intersecting branes models
- Conformal Field Models in String Theory
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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