Level (N)

Symbol

Combination

S

B

I

I3

Q

0

p(proton)

u(1) u(1) d(1)

1 2

1

1 2

1 2

+ | e |

n(neutron)

u(1) d(1) d(1)

1 2

1

1 2

1 2

0

1

u(1)

u(2) u(2) d(2)

1 2

1 3

1 2

1 2

2 3 | e |

d(1)

u(2) d(2) d(2)

1 2

1 3

1 2

1 2

1 3 | e |

u(N)

u(N + 1) u(N + 1) d(N + 1)

1 2

1 3 N

1 2

1 2

1 + 3 N 2 × 3 N | e |

N

d(N)

u(N + 1) d(N + 1) d(N + 1)

1 2

1 3 N

1 2

1 2

1 3 N 2 × 3 N | e |

u(∞)

Structure-less

1 2

0

1 2

1 2

1 2 | e |

d ( ) = u ( ) ¯

Structure-less

1 2

0

1 2

1 2

1 2 | e |