Contact interactions in low scale string models with intersectingD6-branes
نویسندگان
چکیده
منابع مشابه
Unification with low string scale
I argue that in open-string theory with hierarchically small (or large) extra dimensions, gauge groups can unify naturally with logarithmically-running coupling constants at the high Kaluza-Klein (or string-winding) scale. This opens up the possibility of rescuing the standard logarithmic unification atMU ∼ 1015−18 GeV even if the fundamental-string scale is much lower, at intermediate or possi...
متن کاملMatrix Models and D-branes in Twistor String Theory
We construct two matrix models from twistor string theory: one by dimensional reduction onto a rational curve and another one by introducing noncommutative coordinates on the fibres of the supertwistor space P3|4 → CP . We comment on the interpretation of our matrix models in terms of topological D-branes and relate them to a recently proposed string field theory. By extending one of the models...
متن کاملStandard Model at Intersecting D5-branes : Lowering the String Scale
Recently a class of Type IIA orientifold models was constructed yielding just the fermions of the SM at the intersections of D6-branes wrapping a 6-torus. We generalize that construction to the case of Type IIB compactified on an orientifold of T × (C/ZN) with D5-branes intersecting at angles on T. We construct explicit models in which the massless fermion spectrum is just the one of a three-ge...
متن کاملon some bayesian statistical models in actuarial science with emphasis on claim count
چکیده ندارد.
15 صفحه اولContact interactions in D-brane models
We compute the tree-level four-point scattering amplitudes in string models where matter fields live on D-brane intersections. Extracting the contribution of massless modes, we are left with dimension-six four-fermion operators which in general receive contributions from three different sources: exchange of massive Kaluza–Klein excitations, winding modes and string oscillator states. We compute...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2008
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.78.125020