Sökning: onr:"swepub:oai:DiVA.org:kau-26947" >
Superpotential de-s...
Superpotential de-sequestering in string models
-
- Berg, Marcus, 1973- (författare)
- Stockholms universitet,Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013),Stockholm University,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Karlstad University, Sweden
-
- Conlon, Joseph (författare)
- Oxford University, UK
-
- Marsh, David (författare)
- Cornell University, USA
-
visa fler...
-
- Witkowski, Lukas (författare)
- Oxford University, UK
-
visa färre...
-
(creator_code:org_t)
- Berlin : Springer, 2013
- 2013
- Engelska.
-
Ingår i: Journal of High Energy Physics (JHEP). - Berlin : Springer. - 1126-6708 .- 1029-8479. ; 18:February
- Relaterad länk:
-
http://arxiv.org/pdf...
-
visa fler...
-
https://arxiv.org/ab...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Supersymmetry Breaking
- Compactification and String Models
- Intersecting branes models
- Conformal Field Models in String Theory
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas