9,209 research outputs found
Magnetic dipole moments for composite dark matter
We study neutral dark matter candidates with a nonzero magnetic dipole
moment. We assume that they are composite states of new fermions related to the
strong phase of a new gauge interaction. In particular, invoking a dark flavor
symmetry, we analyze the composition structure of viable candidates depending
on the assignations of hypercharge and the multiplets associated to the
fundamental constituents of the extended sector. We determine the magnetic
dipole moments for the neutral composite states in terms of their constituents
masses.Comment: 22 pages, 3 figure
Tatiana GÓRICHEVA, Hablar de Dios resulta peligroso. Mis experiencias en Rusia y en Occidente, Ed. Herder, Barcelona 1986, 142 pp., 12 x 19,5. [RECENSIÓN]
Long-range correlations and trends in Colombian seismic time series
We study long-range correlations and trends in time series extracted from the
data of seismic events occurred from 1973 to 2011 in a rectangular region that
contains mainly all the continental part of Colombia. The long-range
correlations are detected by the calculation of the Hurst exponents for the
time series of interevent intervals, separation distances, depth differences
and magnitude differences. By using a modification of the classical
method that has been developed to detect short-range correlations in time
series, we find the existence of persistence for all the time series considered
except for magnitude differences. We find also, by using the until the
third order, that the studied time series are not influenced by trends.
Additionally, an analysis of the Hurst exponent as a function of the number of
events in the time and the maximum window size is presented.Comment: 21 pages, 6 figures, 2 figures added, types corrected, accepted to be
published in Physica
Isaac VÁZQUEZ JANEIRO, Tratados castellanos sobre la Predestinación y sobre la Trinidad y la Encarnación, del Maestro Fray Diego de Valencia OFM (Siglo XV). Identificación de su autoría y edición crítica, Ed. CSIC - Inst F. Suárez («Bibliotheca Theologica Hispana», 2/2), Madrid 1984, 184 pp. 17,5 x 24,5. [RECENSIÓN]
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