30 research outputs found
Supersymmetric Quantum Corrections and Poisson-Lie T-Duality
The quantum actions of the (4,4) supersymmetric non-linear sigma model and
its dual in the Abelian case are constructed by using the background superfield
method. The propagators of the quantum superfield and its dual and the gauge
fixing actions of the original and dual (4,4) supersymmetric sigma models are
determined. On the other hand, the BRST transformations are used to obtain the
quantum dual action of the (4,4) supersymmetric non-linear sigma model in the
sense of Poisson-Lie T-dualityComment: 18 page
Fractional Supersymmetry As a Matrix Model
Using parafermionic field theoretical methods, the fundamentals of 2d
fractional supersymmetry are set up. Known difficulties
induced by methods based on the quantum group representations
and non commutative geometry are overpassed in the parafermionic approach.
Moreover we find that fractional supersymmetric algebras are naturally realized
as matrix models. The K=3 case is studied in details. Links between 2d
and fractional supersymmetries and N=2
U(1) and N=4 su(2) standard supersymmetries respectively are exhibited. Field
theoretical models describing the self couplings of the matter multiplets
and are given.Comment: Latex,no figure,17page
On Black Hole Effective Potential in 6D/7D N=2 Supergravity
Using the harmonic superspace method and the duality between real and complex
representations of hypermultiplets, we compute the explicit scalar field
expression of the quaternionic metric of the moduli space
SO(1,1)x[SO(4,k)/(SO(4)xSO(k))] of 6D N=2 supergravity with generic k Maxwell
supermultiplets. The obtained metric includes the particular case k=20
associated with 10D type IIA superstring on K3. Uplifting to 7D N=2
supergravity is described and aspects of 6D/7D black attractor effective
potentials are studied.Comment: 49 pages, To appear in NP
Evaluation des incertitudes dans la preparation et la realisation des traitements par radiotherapie transcutanee
SIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc