Essential nature of Newton's constant in unimodular gravity
classification
✦ hep-th
gr-qc
keywords
constantnewtonessentialgravityindependentunimodularapproximationcalculation
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We point out that in unimodular gravity Newton's constant is an essential coupling, i.e. it is independent of field redefinitions. We illustrate the consequences of this fact by a calculation in a standard simple approximation, showing that in this case the renormalization group flow of Newton's constant is gauge and parametrization independent.
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