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143 papers · 1 filter
Virtual states of light non-Borromean halo nuclei
A. Delfino, T. Frederico, M. S. Hussein +1
It is shown that the three-body non-Borromean halo nuclei like ^{12}Be, ^{18}C, ^{20}C have p-wave virtual states with energy of about 1.6 times the corresponding neutron-core bind…
Alfvenic Heating of Protostellar Accretion Disks
M. J. Vasconcelos, V. Jatenco-Pereira, R. Opher
We investigate the effects of heating generated by damping of Alfven waves on protostellar accretion disks. Two mechanisms of damping are investigated, nonlinear and turbulent, whi…
Eta Carinae: Binarity Confirmed
Augusto Damineli, Andreas Kaufer, Bernhard Wolf +3
We report the recovery of a spectroscopic event in eta Carinae in 1997/98 after a prediction by Damineli (1996). A true periodicity with P = 2020+-5 days (0.2% uncertainty) is obta…
Poisson approximation for large-contours in low-temperature Ising models
Pablo A. Ferrari, Pierre Picco
We consider the contour representation of the infinite volume Ising model at low temperature. Fix a subset V of Z^d, and a (large) N such that calling G_{N,V} the set of contours o…
Meson Cloud and SU(3) Symmetry Breaking in Parton Distributions
F. Carvalho, F. O. Durães, F. S. Navarra +2
We apply the Meson Cloud Model to the calculation of nonsinglet parton distributions in the nucleon sea, including the octet and the decuplet cloud baryon contributions. We give sp…
Time-Dependent Variational Analysis of Josephson Oscillations in a Two-component Bose-Einstein Condensate
Chi-Yong Lin, E. J. V. de Passos, Da-Shin Lee
The dynamics of Josephson-like oscillations between two coupled Bose-Einstein condensates is studied using the time-dependent variational method. We suppose that the quantum state…