68,373 research outputs found
Ancillary Documentation on the Union Army Migration Data set (UMAD)
migration; economic history; economics of aging
The half-filled Hubbard chain in the Composite Operator Method: A comparison with Bethe Ansatz
The one-dimensional Hubbard model at half-filling is studied in the framework
of the Composite Operator Method using a static approximation. A solution
characterized by strong antiferromagnetic correlations and a gap for any
nonzero on-site interaction U is found. The corresponding ground-state energy,
double occupancy and specific heat are in excellent agreement with those
obtained within the Bethe Ansatz. These results show that the Composite
Operator Method is an appropriate framework for the half-filled Hubbard chain
and can be applied to evaluate properties, like the correlation functions,
which cannot be obtained by means of the Bethe Ansatz, except for some limiting
cases.Comment: 7 pages, 3 embedded Postscript figures, EuroTeX, submitted to
EuroPhysics Letter
Sensitivity to the Higgs sector of SUSY-seesaw models via LFV tau decays
Here we study and compare the sensitivity to the Higgs sector of the
SUSY-seesaw models via the LFV tau decays: tau-> 3 mu, tau->K^{+}K^{-}, tau->mu
eta and tau-> mu f_{0}. We emphasize that, at present, the two later channels
are the most efficient ones to test indirectly the Higgs particles.Comment: 4 pages, 3 figures, conference SUSY09 Boston (M.Herrero
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