Status | Hypothetical |
---|---|
Symbol | N͂0 1, N͂0 2, N͂0 3, N͂0 4 |
Antiparticle | self (truly neutral particle) |
Types | 4 |
Mass | > 300 GeV |
Electric charge | 0 |
Spin | 1/2 |
Lepton number | 0 |
Baryon number | 0 |
R parity | −1 |
In supersymmetry, the neutralino[1]: 71–74 is a hypothetical particle. In the Minimal Supersymmetric Standard Model (MSSM), a popular model of realization of supersymmetry at a low energy, there are four neutralinos that are fermions and are electrically neutral, the lightest of which is stable in an R-parity conserved scenario of MSSM. They are typically labeled
N͂0
1 (the lightest),
N͂0
2,
N͂0
3 and
N͂0
4 (the heaviest) although sometimes is also used when is used to refer to charginos.
These four states are composites of the bino and the neutral wino (which are the neutral electroweak gauginos), and the neutral higgsinos. As the neutralinos are Majorana fermions, each of them is identical to its antiparticle.