Difference between revisions of "GlueX Physics Exotic Quantum Number Mesons"
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<i>Table 1: The naming scheme for hybrid mesons from the flux-tube model.</i> | <i>Table 1: The naming scheme for hybrid mesons from the flux-tube model.</i> | ||
+ | </center> | ||
+ | |||
+ | |||
+ | <br><center> | ||
+ | <table><tr> | ||
+ | <td width=50>J<sup>PC</sup></td> | ||
+ | <td width=50>(I<sup>G</sup>)</td> | ||
+ | <td width=50></td> | ||
+ | <td width=50>(I<sup>G</sup>)</td> | ||
+ | <td width=75></td> | ||
+ | <td width=50>(I)</td> | ||
+ | <td width=50></td> | ||
+ | </tr><tr> | ||
+ | <td>0<sup>--</sup></td> | ||
+ | <td>(1<sup>-</sup>)</td> | ||
+ | <td>&rho<sub>0</sub></td> | ||
+ | <td>(0<sup>+</sup>)</td> | ||
+ | <td>ω<sub>0</sub>,φ<sup>'</sup><sub>0</sub></td> | ||
+ | <td>(1/2)</td> | ||
+ | <td>K<sup>*</sup><sub>0</sub></td> | ||
+ | </tr><tr> | ||
+ | td><font color=blue>0<sup>+-</sup></font></td> | ||
+ | <td>(1<sup>+</sup>)</td> | ||
+ | <td>b<sub>0</sub></td> | ||
+ | <td>(0<sup>+</sup>)</td> | ||
+ | <td>h<sub>0</sub>,h<sup>'</sup><sub>0</sub></td> | ||
+ | <td>(1/2)</td> | ||
+ | <td>K<sup>*</sup><sub>0</sub></td> | ||
+ | </tr><tr> | ||
+ | <td><font color=blue>1<sup>-+</sup></font></td> | ||
+ | <td>(1<sup>-</sup>)</td> | ||
+ | <td>π<sub>1</sub></td> | ||
+ | <td>(0<sup>+</sup>)</td> | ||
+ | <td>η<sub>1</sub>,η<sup>'</sup><sub>1</sub></td> | ||
+ | <td>(1/2)</td> | ||
+ | <td>K<sup>*</sup><sub>1</sub></td> | ||
+ | </tr><tr> | ||
+ | <td><font color=blue>2<sup>+-</sup></font></td> | ||
+ | <td>(1<sup>+</sup>)</td> | ||
+ | <td>b<sub>2</sub></td> | ||
+ | <td>(0<sup>+</sup>)</td> | ||
+ | <td>h<sub>2</sub>,h<sup>'</sup><sub>2</sub></td> | ||
+ | <td>(1/2)</td> | ||
+ | <td>K<sup>*</sup><sub>2</sub></td> | ||
+ | </tr></table> | ||
+ | <i>Table 2: The naming scheme for exotic quantum-number mesons.</i> | ||
</center> | </center> | ||
Revision as of 16:56, 8 April 2010
Contents
GlueX Physics
Review Papers
Mesons in the Quark Model
Exotic Quantum Number Mesons
Exotic Quantum Numbers
As noted in the Quark Model chapter, simple systems can have the following JPC quantum
numbers:It was also noted that there were a number of JPC quantum numbers that are not
allowed for systems:0--, 0+-, 1-+, 2+-, 3-+, .... (2)
Observation of a state from equation (2) would indicated something outside the simple quark model picture. Such states could include multi-quark states such as , glueballs (states containing only gluons) ,, or hybrid mesons, written schematically as . In fact, the manifest glue represents an excitation of the gluonic field binding the system. For a more detailed description of the statos these states, please consult the recent review papers mentioned in this note. Various models make predictions for expected quantum numbers and masses for these states.
Naming Conventions
The notation used throughout this article to represent hybrid mesons is that which is currently in use by the Particle Data Group. In their notation, the parity and charge conjugation determine the name of thehybrid, which is taken as the name of the normal meson of the same J,P,C and isospin. The total spin is then used as a subscript to the name. The PDG naming scheme for the hybrid mesons from the flux-tube model is given in Table 1. We indicate the exotic quantum numbers in blue, and also note that that names for the JPC=0-- would be the ρ0, ω0 and the φ0.
JPC | (IG) | (IG) | (I) | |||
1++ | (1-) | a1 | (0+) | f1,f'1 | (1/2) | K1 |
1++ | (1+) | ρ1 | (0-) | ω1,φ1 | (1/2) | K*1 |
0-+ | (1-) | π0 | (0+) | η0,η'0 | (1/2) | K0 |
1-+ | (1-) | π1 | (0+) | η1,η'1 | (1/2) | K*1 |
2-+ | (1-) | π2 | (0+) | η2,η'2 | (1/2) | K2 |
0+- | (1+) | b0 | (0+) | h0,h'0 | (1/2) | K*0 |
1+- | (1+) | b1 | (0+) | h1,h'1 | (1/2) | K1 |
2+- | (1+) | b2 | (0+) | h2,h'2 | (1/2) | K*2 |
Table 1: The naming scheme for hybrid mesons from the flux-tube model.
JPC | (IG) | (IG) | (I) | |||
0-- | (1-) | &rho0 | (0+) | ω0,φ'0 | (1/2) | K*0 |