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39 papers · 1 filter
Double beta decay of sigma^- hyperons
C. Barbero, G. Lopez Castro, A. Mariano
We compute the strangeness-conserving double beta decay of hyperons, which is the only hadronic system that can undergo such decays. We consider both, the lepton number conse…
Scalar fields in multidimensional gravity. No-hair and other no-go theorems
K. A. Bronnikov, S. B. Fadeev, A. V. Michtchenko
Global properties of static, spherically symmetric configurations of scalar fields of sigma-model type with arbitrary potentials are studied in dimensions, including space-time…
"No-Scalar-Hair" Theorems for Nonminimally Coupled Fields with Quartic Self-Interaction
Eloy Ayón-Beato
Self-gravitating scalar fields with nonminimal coupling to gravity and having a quartic self-interaction are considered in the domain of outer communications of a static black hole…
Deformations of the geometry of lipid vesicles
Riccardo Capovilla, Jemal Guven, Jose' Antonio Santiago
Consider a closed lipid membrane (vesicle), modeled as a two-dimensional surface, described by a geometrical hamiltonian that depends on its extrinsic curvature. The vanishing of i…
Casimir Forces between Nanoparticles and Substrates
C. E. Roman-Velazquez, Cecilia Noguez, C. Villarreal +1
We study the Casimir force between a nanoparticle and a substrate. We consider the interaction of metal nanoparticles with different substrates within the dipolar approximation. We…
All Static Circularly Symmetric Perfect Fluid Solutions of 2+1 Gravity
Alberto A. Garcia, Cuauhtemoc Campuzano
Via a straightforward integration of the Einstein equations with cosmological constant, all static circularly symmetric perfect fluid 2+1 solutions are derived. The structural func…