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One thing we have to distinguish here and it's very important. Mass and weight are not the same thing. Weight is due entirely to mass undergoing acceleration in a gravitational field. Mass is the energy/matter density that an object contains....even though weight and mass are both expressed in the same units of measurement. The Higgs particle imparts mass to a particle/object. Funnily enough, the Higgs particle has more mass energy than the particle it imparts mass to!!!! However, the lifetime of a Higgs particle is relatively transitory.
As far as it's relationship to "Dark Matter".....who's to say. However it's believed that Dark Matter is undetectable other than it's influence due to gravity, and it's probably not the ordinary matter we associate particles with. Basically, they don't what it is and are only making educated guesses at what it could be.
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