All mesons are unstable. Most lighter of them, pions are carriers of strong interaction between protons and neutrons, which create nuclei.
In table below are shown some hadrons, beginning from ones built
with only first quark family (u and d), through ones consisting
heavier quarks (s, c), up to most heavier quarks (b
i t).
There are given only "particles" differing in quark content, i.e. "particles" like hyperion L, for which "quark content" is identical like to proton, and differs only with a mass, are not given, see "Proton & Co.".
Energy given in MeV/c2.
| Barions | Mesons |
| uud p (proton) 938,271998+/-0,000038 |
(uu + dd)/sqrt(2) p0
(neutral pion) 134,9766+/-0,0006 |
| udd n (neutron) 939,565330+/-0,000038 |
ud p+
(positive pion) 139,57018+/-0,00035 charge radius r=0,672x10-15 m |
| uud p (antiproton) 938 |
du p- (negative
pion) 139,57018+/-0,00035 charge radius r=0,672x10-15 m |
| ...... |
|
|
|
| uds L(lambda) 1115,683+/-0,006 |
ds K0 (neutral kaon) 497,672+/-0,031 |
| uds S0 (sigma
zero) 1192.642+/-0,024 |
ds K0 (neutral antikaon) 497,672+/-0,031 |
| uus S+ (sigma
plus) 1189,37+/-0,07 |
us K+ (positive kaon) 493,677+/-0,013 |
| dds S- (sigma
minus) 1197,449+/-0,030 |
su K- (negative kaon) 493,677+/-0,013 |
| uss X0 (ksi
zero) 1314.83+/-0,20 |
|
| dss X- (ksi
minus) 1321,31+/-0,13 |
| sss W- (omega minus) 1672,45+/-0,29 |
|
|
|
| ddc Sc0
(sigma-c) 2452,6+/-0,6 |
cc J/Y(charmionium 1974
r.) also called tez hc 3096,87+/-0,04 |
| udc Sc+
(sigma-c) 2451,3+/-0,7 |
cu D0 1864,5+/-0,5 |
| uuc Sc++
(sigma-c) 2452,6+/-0,6 |
cd D+ 1869,3+/-0,5 |
| ...... | cd D- 1869,3+/-0,5 |
| ...... |
|
|
|
| udb Lb0
5624+/-9 |
bb Y (ypsylon 1977 r.) 9460,30+/-0,26 |
| usb Xb0
Energia ? lifetime 1,39 ps |
ub B+ 5279,0+/-0,5 lifetime 1,674 ps |
| ...... | ....... |