A perspectiva do negro: uma possibilidade de pensar a diáspora no Brasil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Exact Foldy-Wouthuysen transformation for real spin-0 particle in curved space

Up to now, the only known exact Foldy-Wouthuysen transformation (FWT) in curved space is that concerning Dirac particles coupled to static spacetime metrics. Here we construct the exact FWT related to a real spin-0 particle for the aforementioned spacetimes. This exact transformation exists independently of the value of the coupling between the scalar field and gravity. Moreover, the gravitational Darwin term written for the conformal coupling is one-third of the corresponding term in the fermionic case. There are some arguments in the literature that seem to favor the choice lambda=1/6. We rehearse a number of claims of these works.

Pharyngeal airway space cephalometric evaluation in transverse maxillary deficient patients after SARME

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)