Haelfix
Science Advisor
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I think he's talking about a SDM neutrino (different quantum numbers), but yes it too feels gravity, even though naively they are taken to be massless.
The point to take away from this thread, is that in the context of general relativity, is that PRESSURE affects the quantity we experimentally measure as 'mass'. It is a part of the stress energy content (a tensor, with 3 diagonal entries, and off diagonal entries that measure this quantity)
This is the source term that bends or 'creates' the geometry in which we live in. Or you could think of the geometry as being set that forces the source term to be what it is.
The point to take away from this thread, is that in the context of general relativity, is that PRESSURE affects the quantity we experimentally measure as 'mass'. It is a part of the stress energy content (a tensor, with 3 diagonal entries, and off diagonal entries that measure this quantity)
This is the source term that bends or 'creates' the geometry in which we live in. Or you could think of the geometry as being set that forces the source term to be what it is.