Unsolved Problems for the 21st Century

Force Particle Range Interaction Effect
Strong Gluon Short Quarks Binds quarks together Electromagnetic Photon Infinite Electrons Transfers energy from place to place Weak W+,W-,Z0 Short Leptons Governs Radioactive Decay Gravitational1 Higgs Boson Short All Massive Particles Confers mass to particles Gravitational2 Graviton Infinite All Massive Particles Conveys Gravitational Attraction

What is the nature of the Higgs Boson?

Where is the missing matter in the universe?

Speculation: Can the graviton's effect be shielded?

Physics (the short version):

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