There is a curious fact in modern physics: we know how to calculate almost everything, but we understand less and less what we are describing. Theories work, often in extraordinary ways. Forecasts coincide with experiments with measurements at an impressive number of figures. Yet, if we ask what is really happening, the answer becomes vague, fragmented, sometimes circular. Interactions without a mechanism In the standard story: particles interact because there are fundamental interactions, interactions exist because they are described by fields, fields exist because they work mathematically. But what happens physically during an interaction? What does it mean, in concrete terms, that two entities “exchange” something during interaction? Energy? Momentum? Information? Above all: why does that exchange have that value and not another? Here the first problem emerges: the physical mechanism is replaced by formalisation. Constants that don't tell a story Mating constants are an emblemat...
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