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D-Instanton effects in Type II and F-theory
D-Instanton effects in
Type II and F-theory
M.C., J. Halverson, R. Richter, 0905.3379; 0909.4292; 0910.2239;!
M.C., J. Halverson, P. Langacker, R. Richter, 1001.3148 !
(new twist on neutrino masses)
II. Particle Physics implications (Type II):
Systematic Study of Multi-Stack D-Brane Quivers
(MSSM’s w/ realistic fermion textures)
Employing non-perturbative effects: D-instanons
Focus on:
I. D-instantons in Type II (primarily IIA) and their
lifts to global F-theory (effects on charged matter couplings)
F-theory aspects: M.C., I. Garcia-Etxebbaria, R. Richter, 0911.0012
M.C., I. Garcia-Etxebbaria, J. Halverson, UPR-1216-T, about to appear!
Outline
iii. Particle physics implications
Progress on local and global constructions
Systematic local constructions of realistic MSSM’s
I. Type II side:
i. Model Building
[w/ (intersecting) D-branes --brief summary]
ii. Non-perturbative effects: D-instantons
Focus on O(1) Instantons
[aspects of U(1) instantons -time permitting]
II. Instantons in F-theory:
i. Lifting of zero modes for O(1) instantons
ii. Examples of global constructions w/ O(1) instantons
First supersymmetric 3-family Standard-like Models [M.C. , Shiu, Uranga ‘01]…
(Type IIA side)
intersecting D7- branes wrapping four-cycles in CY
[in F-theory part of geometry of singular CY four-fold]
promising local MSSM (E8 - intersection point) [Heckman ,Vafa et al.’09] !
global models? - early stages: GUT’s [Marsano, Saulina, Schaefer-Nemeki’09],!
[Blumenhagen,Grimm,Jurke,Weigand’09]… c.f. talks by Schaefer-Nemeki, Saulina!
Texas AM group’04-’08…!
Just MSSM [Gmeiner,Honecker, 0806.3039]!
intersecting D7- branes wrapping four-cycles in CY
[in F-theory part of geometry of singular CY four-fold]
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