|
| O | X | O | X | O | X | four-block | ||
|
| μ = 0 | μ = 0 | μ = 3 | μ = 3 | μ = 1, 2 | μ = 1, 2 | μ = 0 | μ = 3 | μ = 1, 2 |
| particle Z2 | − | − | 0 | + | 0 | 0 | ± | ± | 0 |
| anti-particle Z1 | + | + | 0 | − | 0 | 0 |
|
| 0 |