In our present understanding of matter, the fundamental particles are comprised of six leptons and six quarks described by non-abelian quantum field theories.  The strong force is comprised of eight massless gluons g, and the electro-weak force comprised or mediated by four exchange particles.  These are the photon (g) and three field particles the W⁺ ,W^-, and Z⁰ .   The Higgs Boson, H⁰ is predicted as a very heavy particle whose field generates all particle masses. Figure 1 below shows these particles and mediators.

Photo Credit:   The Royal Swedish Academy of Sciences.
Used by permission

 

NAME		SYMBOL	REST ENERGY	CHARGE	JOULES
L E P T O N S	electron neutrino	ne	< eV
	tau neutrino	nt	< eV
	muon nutrino	nm	< eV
	muon	m	m = 105.658357 M eV
	tau	t-	< eV
	electron	e-	m = 0.510998902 M eV		1/2
Q U A R K S	top quark	t	< eV
	bottom quark	b	< eV
	charmed quark	c	< eV
	strange quark	s	< eV
	up quark	u	< eV
	down quark	d	< eV
C      A  F   R  O   R  R   I  C   E  E   R      S	gluon	g	m = 0 eV
	photon	g	m <  2 x 10-16 eV	q < 5 X10-30e
	W boson	W+	m = 80.419 Gev	+ 1 e
	W boson	W-	m = 80.419 G eV	- 1 e
	Z boson	Z0	m = 91.1882 G eV	0 e
?	Higgs boson	H0	< eV

Most recent data credit:    D.E. Groom et al., The European Physical Journal C15 (2000) 1

Only quarks feel the effects of the strong nuclear force. Both quarks and  leptons are subject to the weak nuclear force. Every  particle that has electric charge, including the W+ and W-, feels the electromagnetic force.

The baryons and mesons are Composite Particles: quarks bound together by gluons. Baryons include the proton and neutron inside the atomic nucleus, and new:

families of "hyperons" and "resonances" at higher energies. Mesons have a quark and an antiquark bound in an "atom-like" system. Some of the more exciting baryons and mesons have at least one heavy quark such as a charm or bottom quark. Certain pairs of mesons like the Ko and anti-K o are used to study the breaking of the symmetries of the Standard Model, as seen in CP violation.^a