List of Elementary Particles

Elementary Particles

Leptons
Particle	Symbol	Mass (MeV/c2)	Electric Charge
electron	e-	0.511	−1
muon	μ-	105.7	−1
tau	τ	1784.1	−1
electron neutrino	νe	<7.3×10−6	0
muon neutrino	νμ	<0.27	0
tau neutrino	ντ	<35	0
Quarks1
down	d	5–15	− 1-3
up	u	2–8	2-3
strange	s	100–300	− 1-3
charm	c	1300–1700	2-3
bottom	b	4700–5300	− 1-3
top	t	>91,000	2-3
Gauge Bosons
photon	&ggr;	0	0
gluon	g	0	0
W-boson	W	80,200	1
Z-boson	Z	91,170	0
Some Sample Hadrons
Particle	Symbol	Mass (MeV/c2)	Electric Charge	Quark Content
positive pion	π+	139.6	1	ū
positive kaon	K+	493.7	1	ū
proton	p	938.3	1	uud
neutron	n	939.6	0	udd
lambda	&Lgr;	1115.6	0	uds

For each of these particles, except the photon, gluon, and Z-boson, there is an antiparticle with the same mass and opposite charge. In most cases the antiparticle is denoted by an overbar over the particle symbol (e.g., the symbol for the antiproton is ̄.

¹ Because quarks cannot be isolated, the masses given for them are approximate.