We perform a Bethe–Salpeter equation (BSE) evaluation of composite scalar boson masses in order to verify how these masses can be smaller than the composition scale. The calculation is developed with a constituent self-energy dependent on its mass anomalous dimension ([Formula: see text]), and we obtain a relation showing how the scalar mass decreases as [Formula: see text] is increased. We also discuss how fermionic corrections to the BSE kernel shall decrease the scalar mass, whose effect can be as important as the one of a large [Formula: see text]. An estimate of the top quark loop effect that must appear in the BSE calculation gives a lower bound on the composite scalar mass.
Neste trabalho, considerando um modelo simplificado, estimamos o momento magnético m ¯, associado a dois ímãs de neodímio com diferentes geometrias. Investigamos como o efeito da temperatura modifica propriedades magnéticas, como a intensidade do campo magnético avaliada no extremo destes magnetos, a partir destes resultados apresentamos uma anomalia fictícia de cunho didático inspirado na discussão construída ao longo do trabalho, que permite ilustrar um problema atual no cenário de física de altas energias, conhecido como anomalia (g-2) do múon.
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