50,670 research outputs found
New Formulas and Predictions for Running Fermion Masses at Higher Scales in SM, 2HDM, and MSSM
Including contributions of scale-dependent vacuum expectation values, we
derive new analytic formulas and obtain substantially different numerical
predictions for the running masses of quarks and charged-leptons at higher
scales in the SM, 2HDM and MSSM. These formulas exhibit significantly different
behaviours with respect to their dependence on gauge and Yukawa couplings than
those derived earlier. At one-loop level the masses of the first two
generations are found to be independent of Yukawa couplings of the third
generation in all the three effective theories in the small mixing limit.
Analytic formulas are also obtained for running in 2HDM and
MSSM. Other numerical analyses include study of the third generation masses at
high scales as functions of low-energy values of and SUSY scale
GeV.Comment: 42 pages RevTeX, including 16 figures. Typos corrected and one
reference adde
Effective Actions for 0+1 Dimensional Scalar QED and its SUSY Generalization at
We compute the effective actions for the 0+1 dimensional scalar field
interacting with an Abelian gauge background, as well as for its supersymmetric
generalization at finite temperature.Comment: 5 pages, Latex fil
Nodeless d-wave superconducting pairing due to residual antiferromagnetism in underdoped PrCeCuO
We have investigated the doping dependence of the penetration depth vs.
temperature in electron doped PrCeCuO using a model
which assumes the uniform coexistence of (mean-field) antiferromagnetism and
superconductivity. Despite the presence of a pairing gap in the
underlying spectrum, we find nodeless behavior of the low- penetration depth
in underdoped case, in accord with experimental results. As doping increases, a
linear-in- behavior of the penetration depth, characteristic of d-wave
pairing, emerges as the lower magnetic band crosses the Fermi level and creates
a nodal Fermi surface pocket.Comment: Accepted in PRL for publicatio
Entropic corrections to Newton's law
In this short letter we calculate separately the generalized uncertainty
principle (GUP) and self gravitational corrections to the Newton's
gravitational formula. We show that for a complete description of the GUP and
self-gravity effects, both temperature and the entropy must be modified.Comment: 4 pages, Accepted for publication in "Physica Scripta",Title changed,
Major revisio
Driven Heisenberg Magnets: Nonequilibrium Criticality, Spatiotemporal Chaos and Control
We drive a -dimensional Heisenberg magnet using an anisotropic current.
The continuum Langevin equation is analysed using a dynamical renormalization
group and numerical simulations. We discover a rich steady-state phase diagram,
including a critical point in a new nonequilibrium universality class, and a
spatiotemporally chaotic phase. The latter may be `controlled' in a robust
manner to target spatially periodic steady states with helical order.Comment: 7 pages, 2 figures. Published in Euro. Phys. Let
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