674 research outputs found
Probing mu-term Generation Mechanism in String Models
We give a generic method to select a realistic -term generation
mechanism based on the radiative electroweak symmetry breaking scenario and
study which type is hopeful within the framework of string theory. We discuss
effects of the moduli F-term condensation and D-term contribution to soft
scalar masses.Comment: Latex, 17 pages, 4 Postscript figure
Drinfel'd Twisted Superconformal Algebra and Structure of Unbroken Symmetries
We investigate deformed superconformal symmetries on non(anti)commutative
(super)spaces from the point of view of the Drinfel'd twisted symmetries. We
classify all possible twist elements derived from an abelian subsector of the
superconformal algebra. The symmetry breaking caused by the
non(anti)commutativity of the (super)spaces is naturally interpreted as the
modification of their coproduct emerging from the corresponding twist element.
The remaining unbroken symmetries are determined by the commutative properties
of those symmetry generators possessing the twist element. We also comment on
non-canonically deformed non(anti)commutative superspaces, particularly those
derived from the superconformal twist element (\mathcal{F}_{\mathrm{SS}}).Comment: 13 pages, LaTeX; typos of published version and references are
correcte
Magnetic-Field-Induced Superconductivity in Eu_<0.8>Sn_<0.2>Mo_6S_<7-y>Se_y (Transport and Fermiology)
The electrical resistance of Eu_Sn_Mo_6S_Se_y (0≤y≤0.7) was measured under the magnetic fields up to 230 kOe. The hysteresis of the resistance was observed in the field range where the superconductive-normal-superconductive transitions appear. Analysis of the hysteresis provides a direct evidence that the magnetic-field-induced superconductivity of these compounds is caused by the Jaccarino-Peter compensation mechanism
- …