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If brane theory says that gravity is weak because it extends into another spatial dimension, is it also saying that the gravity attributed to dark matter might be due to matter in another spatial dimension?
string theory does offer possible candidates for dark matter since since many theories include a LOT more particles and forces than has been observed (detected). String theory seems to offer no specific predictions as to which of many possible candidates are the dark energy or dark matter
Just to be careful, branes are not 2D strings. Branes are nonperturbative objects that arise as solutions to the supergravity equations of motion. They can be in any number of dimensions (up to the total dimensionality of the theory), although some string theories can only have odd or even dimension branes. The proper notation is a Dp-brane, where p denotes the number of spatial dimensions. Most popular brane world models posit our universe to be a D3-brane, with 3 uncompactified spatial dimensions.Naty1 said:None that I have read about. There are a LOT of string theories out, many have branes; that is two dimensional strings.
Dark matter is a type of matter that does not interact with light or other forms of electromagnetic radiation, making it invisible to telescopes. Its existence is inferred from its gravitational effects on visible matter.
A brane, short for membrane, is a theoretical concept in physics that refers to a higher-dimensional surface on which particles and other objects can exist. It is often used in string theory and other theories of the universe.
Dark matter on a different brane refers to the idea that dark matter may exist on a brane other than the one we currently inhabit. This is a possible explanation for why we have not been able to directly detect dark matter in our own brane.
Scientists study dark matter on a different brane through theoretical models and mathematical calculations. They also look for indirect evidence of its existence through its gravitational effects on visible matter and the overall structure of the universe.
If dark matter exists on a different brane, it could have significant implications for our understanding of the universe and the fundamental laws of physics. It could also impact our search for dark matter and the development of new theories to explain its nature.