Thursday, 19 July 2018

particle physics - Doesn't dark matter imply a new force?


Given that every particle that we have experimental confirmation of is an oscillation of its field (from what we know), and given dark matter is thought to be a particle yet undiscovered according to most theory, isn't it implied that this is an oscillation in a yet unknown field? Especially with the lack of results relating to WIMPs and other particles theorized.


What theories predict a new field relating to dark matter? Have any garnered significant interest and additional work?



Answer



In the standard model of particle physics the fundamental forces are carried by the gauge bosons of the $SU(3)xSU(2)xU(1)$ theory. In the Feynman diagrams, any $dp/dt$ transferred in the interaction can be considered as a force, but there are just three fundamental forces, weak, strong, electromagnetic (and in effective quantizations of gravity, also gravitational) .


For dark matter extensions of the standard model and completely new theories ( like string theory) may be used. For GUTS there are extra symmetries and extra gauge bosons,, sometimes called X and Y, in analogy with the weak W and Z so in this sense there are extra fundamental forces at that level.


At the moment it will depend on the models used in the case that WIMPs are the constituents of dark matter. There are other models for dark matter, like MACHOs that have nothing to do with fundamental forces.


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