Cirrus Light 
"[@redweasel":](/1385850#comment_7281109
)
I said all baryonic matter is trapped, but it's not_*strictly_* baryonic matter that is confined to our brane. To be more precise, _*every_* particle is, afaik, aside from gravitons.
Gravity is the only force I know of that's described by a tensor field, and I think that's related to why it's not attached to our brane. A better educated physicist probably has the answer to that :q
(or just one willing to poke around the internet a little >.> )
And yeah, like many things, they use the math of vibrations, but it is just itself, not our model. I don't know if the relevant math describes it as anything other than vibrations - in fact I think it's somewhat explicitly waves in space, otherwise it wouldn't make sense that their model explicitly requires higher_*spatial_* dimensions, which is exactly what it does.
If they weren't spatial, then it wouldn't even be worth mentioning, but everything I've seen on string theory is quite explicit that it calls for 10_*spatial_* dimensions. The behavior of gravitons and the brane we're trapped on is exactly the behavior of an object in a space.
I'm not very familiar with the exact nature of the curvature of the higher dimensions enough to state whether it's all that different from the curvature of the familiar 4d spacetime or not, though.
Sciencepone of Science!
I said all baryonic matter is trapped, but it's not
Gravity is the only force I know of that's described by a tensor field, and I think that's related to why it's not attached to our brane. A better educated physicist probably has the answer to that :q
And yeah, like many things, they use the math of vibrations, but it is just itself, not our model. I don't know if the relevant math describes it as anything other than vibrations - in fact I think it's somewhat explicitly waves in space, otherwise it wouldn't make sense that their model explicitly requires higher
If they weren't spatial, then it wouldn't even be worth mentioning, but everything I've seen on string theory is quite explicit that it calls for 10
I'm not very familiar with the exact nature of the curvature of the higher dimensions enough to state whether it's all that different from the curvature of the familiar 4d spacetime or not, though.