﻿ List of mesons

# List of mesons

The following tables contain the ground states of all known and predicted pseudoscalar (JP = 0 -) and vector mesons (JP = 1 -).

The symbols used in the tables are: ( isospin ), (G - parity ), ( total angular momentum ), ( parity ), (C - parity), (electric charge ), ( strangeness ), ( Charm ), ( Bottom Ness ), u (up- quark ), d ( down quark ), s ( strange quark ), c ( charm quark ) and b ( bottom quark ) and the symbols for the particles themselves

In each case, the characteristics and the composition of the curd particles are listed. Quarks are for the corresponding antiparticles to be replaced by antiquarks (and vice versa) and the sign of the quantum numbers, and go around. Values ​​in red are not sure yet confirmed by the experiment, but predicted by the quark model and in agreement with the measurements.

The numbers in parentheses following a numerical value represent the uncertainty in the last digits of the value. (Example: Specifying 134.9766 (6 ) is equivalent to 134.9766 ± 0.0006. )

## Pseudoscalar mesons

π π0 π -

( ρ0 γ ) / ( γ π π - ) or π0 π0 η

π π0 or π0 e νe

π0 π0

π0 π0 π0 or π π0 π -

π0 γ

## Notes to the neutral kaons

In the neutral kaons occur two complications:

• Because of the mixture of neutral kaons, the KS and KL are not eigenstates of strangeness. However, they are eigenstates of the weak force, which is responsible for its decay. Therefore, only these particle states have a certain life span.
• The values ​​given in the table are linear combinations of the KS and KL are only approximately correct, since there is a small correction due to the CP violation. See CP violation in kaons.

These effects there are in principle in other flavor - neutral mesons. The weak eigenstates are, however, considered only the kaons as separate particles, since they have drastically different lives.

## Note to ( missing ) mesons with top quarks

Although the quark compositions dt, ut, st, ct, bt, td, tu, ts, tc, tb and tt of the notation are possible, there are no mesons with top quark content, as this quark as opposed to all other quarks well ahead of time decays, which is needed to form hadrons ( mesons and baryons ).

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