# The cosmological constant is always dimensional less?

1. Apr 22, 2010

### alejandrito29

the cosmological constant is always dimensional less?????

in the randall sundrum models the tension of our brane is

$$T=24M^3_5 \sqrt{\frac{-\Lambda}{24M^3_5}}$$...the sub index of M is the number of dimension of space time and the supercript is the power.

¿whats units have the planck scales $$M_4$$ and $$M_5$$???....and then....¿whats units have the tension $$T$$???

2. Apr 24, 2010

### Finbar

Re: question

The cosmological has dimensions of mass squared in every dimension(units c= hbar=2)

where did you get this equation for T from?