Galileons And Ghostly Degrees Of Freedom

There has been discussion among cosmologists about galileons, a hypothetical, class of effective scalar fields which are extremely universal and arise generically in describing the short distance behavior of the new degrees of freedom introduced during the process of modifying gravity, and in describing the dynamics of extra dimensional brane worlds.  They might be able to explain dark matter - no cosmological constant needed. Despite prolific use of the term 'theory', they are math that hopes to become physics. read more

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