Abstract (EN):
We study the simplest class of Bekenstein-type, varying models, in which the two available
free functions (potential and gauge kinetic function) are Taylor-expanded up to linear order. Any
realistic model of this type reduces to a model in this class for a certain time interval around the
present day. Nevertheless, we show that no such model is consistent with all existing observational
results. We discuss possible implications of these findings, and in particular clarify the ambiguous
statement (often found in the literature) that “the Webb results are inconsistent with Oklo”.
Idioma:
Português
Tipo (Avaliação Docente):
Científica