particles gauge and Higgs bosons see [unranked] elementary bosons 1 gamma - electromagnetic force carrier particle 2 g - strong force carrier particle 3 graviton [unconfirmed] - gravity force carrier particle 4.1 W+ - weak interaction carrier particle 4.2 W- - weak interaction carrier particle 5 Z - weak interaction carrier particle 6 Higgs bosons [hypothetical] 7 heavy bosons other than Higgs bosons [hypothetical] 8 axions (A0) and other very light bosons [hypothetical]