Why is particle mass an exact value and not a value with a “width”?
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in the energy/mass conservation law;
in the source of the gravitational field that the object containing massive particles such as the electron produces;
in the resistance towards acceleration that the massive objects
in the source of the gravitational field that the object containing massive particles such as the electron produces;
in the resistance towards acceleration that the massive objects
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The Higgs boson is an elementary particle in the Standard Model of particle physics, produced by the quantum excitation of the Higgs field,[8][9] one of the fields in particle physics theory.[9] It is named after physicist Peter Higgs, who in 1964, along with five other scientists, proposed the Higgs mechanism to explain why particles have mass. This mechanism implies the existence of the Higgs boson. The boson's existence was confirmed in 2012 by the ATLAS and CMS collaborations based on collisions in the LHC at CERN.
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