2,249 research outputs found
Peripheral NN scattering from subtractive renormalization of chiral interactions
We apply five subtractions in the Lippman-Schwinger (LS) equation in order to
perform a non-perturbative renormalization of chiral N3LO nucleon-nucleon
interactions. Here we compute the phase shifts for the uncoupled peripheral
waves at renormalization scales between and . In this range, the results are scale invariant and provide an
overall goof agreement with the Nijmegen partial wave analysis up to at least
, with a cutoff at .Comment: Talk given at the XXXVI RTFNB, Maresias Beach, Brazil, September 201
Similarity Renormalization Group Evolution of Chiral Effective Nucleon-Nucleon Potentials in the Subtracted Kernel Method Approach
Methods based on Wilson's renormalization group have been successfully
applied in the context of nuclear physics to analyze the scale dependence of
effective nucleon-nucleon () potentials, as well as to consistently
integrate out the high-momentum components of phenomenological high-precision
potentials in order to derive phase-shift equivalent softer forms, the so
called potentials. An alternative renormalization group approach
that has been applied in this context is the Similarity Renormalization Group
(SRG), which is based on a series of continuous unitary transformations that
evolve hamiltonians with a cutoff on energy differences. In this work we study
the SRG evolution of a leading order (LO) chiral effective potential in
the channel derived within the framework of the Subtracted Kernel
Method (SKM), a renormalization scheme based on a subtracted scattering
equation.Comment: Published versio
El dilema antropocéntrico. Notas sobre la economÃa polÃtica de la naturaleza de la cultura indÃgena
En este texto se exponen algunas reflexiones sobre la relación de los pueblos indÃgenas con aquella esfera de la realidad que en occidente llamamos "naturaleza" y se hace una crÃtica a la dicotomÃa oposicional naturaleza/cultura del racionalismo antropocéntrico occidental-que ha justificado y sigue justificando la opresión y explotación de los indÃgenas- a través de un recorrido sobre de las bases morales de la territorialidad indÃgena y de la relación cultura-naturaleza que sustentan la vida socio-biológica de los pueblos indÃgenas. En las comunidades indÃgenas de la Amazonia el sector de la econmÃa de subsistencia (economÃa social) con sus reglas culturales estrictas de reciprocidad, complementariedad, diversidad, formalización ritual y sacramental, y densidad espiritual tiene un papel hegemónico que da forma a toda la red de relaciones sociales internas en términos de una "economÃa moral" que involucra a la totalidad de los organismos y personas en la red dinámica de relaciones
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