On the relationship of gravitational constants in KK reduction

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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Final version published in JHEP

Scientific paper

10.1088/1126-6708/2000/08/009

In this short note, we try to clarify a seemly trivial but often confusing question in relating a higher-dimensional physical gravitational constant to its lower-dimensional correspondence in Kaluza-Klein reduction. In particular, we re-derive the low-energy M-theory gravitational constant in terms of type IIA string coupling $g_s$ and constant $\alpha'$ through the metric relation between the two theories.

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