BOSON – particles associated with fundamental forces - have integer spin

FERMIONS – particles normally associate with matter

- have half integer spin- divided into twelve flavors

Photon - a particle in which an electron sends to another electron

-Not seen-Messenger photons

Gluon - mediators of the strong interaction and carry both colour and anticolours - Resonsible for “gluing” the quarks together - Particles which commute between the quarks, sticking them together in pairs or threes - Strong forceW and Z bosons – mediate the weak force

Graviton – when two particles exert a gravitational influence on each other, gravitons are exchanged between them,

- carry two units of spin; all particles attractHiggs boson - hypothetical massive scalar elementary particle predicted to exist by the standard model

-carry fractional charges of the electrons, either 2/3 or -1/3-Do not exist alone-They are always bound up together (in threes or in quark-antiquark combinations- Every quark carries one of three color charges of the strong interaction; antiquarks similarly carry anticolor - Unlike the electromagnetic force which di5minishes as charged particles separate, color charged particles feel increasing force-Color charged particles may combine to form color neutral composite particles called hadrons-three quarks can exist together, one quark being "red", another "blue", another "green". These three colored quarks together form a color- neutral baryon-symmetrically, three antiquarks with the colors "antired", "antiblue" and antigreen" can form a color-neutral antibaryon

- come with and without an electric charge- All have a spin of ½ - best known lepton is an electron-

Elementary Particles

Elementary Particles

Bosons Fermions

Gauge Bosons

Other Bosons

Gluon

W and Z bosons

Photon

Graviton

Higgs Boson

LeptonsQuarks

Bottom

Top

Strange

Charm

Down

Up

Electron

Tau Particle

Muon

Neutrino