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 $0.1~ \rm{fm}^{-1}$ and $1 ~ \rm{fm}^{-1}$. In this range, the results are scale invariant and provide an overall goof agreement with the Nijmegen partial wave analysis up to at least $E_{\rm{lab}} = 150 ~ \rm{MeV}$, with a cutoff at $\Lambda = 30~\rm{fm}^{-1}$.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 ($NN$) potentials, as well as to consistently integrate out the high-momentum components of phenomenological high-precision $NN$ potentials in order to derive phase-shift equivalent softer forms, the so called $V_{low-k}$ 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 $NN$ potential in the $^1 S_0$ 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 economía política de la naturaleza de la cultura indígena

En este texto se exponen algunas reflexiones sobre la relación de los pueblos indígenas con aquella esfera de la realidad que en occidente llamamos "naturaleza" y se hace una crítica a la dicotomía oposicional naturaleza/cultura del racionalismo antropocéntrico occidental-que ha justificado y sigue justificando la opresión y explotación de los indígenas- a través de un recorrido sobre de las bases morales de la territorialidad indígena y de la relación cultura-naturaleza que sustentan la vida socio-biológica de los pueblos indígenas. En las comunidades indígenas de la Amazonia el sector de la econmía de subsistencia (economía 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 "economía moral" que involucra a la totalidad de los organismos y personas en la red dinámica de relaciones