10,400 research outputs found
Chargino Contributions to Epsilon and Epsilon-Prime
We analyze the chargino contributions to the K-\bar K mixing and
epsilon-prime in the mass insertion approximation and derive the corresponding
bounds on the mass insertion parameters. We find that the chargino
contributions can significantly enlarge the regions of the parameter space
where CP violation can be fully supersymmetric. In principle, the observed
values of epsilon and epsilon-prime may be entirely due to the chargino --
up-squark loops.Comment: 9 pages, 2 figures, to appear in PL
Yangian Algebras and Classical Riemann Problems
We investigate different Hopf algebras associated to Yang's solution of
quantum Yang-Baxter equation. It is shown that for the precise definition of
the algebra one needs the commutation relations for the deformed algebra of
formal currents and the specialization of the Riemann problem for the currents.
Two different Riemann problems are considered. They lead to the central
extended Yangian double associated with and to the degeneration of
scaling limit of elliptic affine algebra. Unless the defining relations for the
generating functions of the both algebras coincide their properties and the
theory of infinite-dimensional representations are quite different. We discuss
also the Riemann problem for twisted algebras and for scaled elliptic algebra.Comment: 36 pages, 3 figures under bezier.sty, corrected some typo
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