Higgsino

Higgsinos (summarizing formula symbol ) are the hypothetical fermionic super partners of the bosonic Higgs fields in supersymmetric theories of elementary particle physics . ${\displaystyle {\tilde {H}}}$ ${\displaystyle H\,\!}$

Analogous to the number of Higgs fields, there are therefore a total of five Higgsinos in the MSSM :

Higgsinos

associated Higgs field contained in ... ${\displaystyle H\,\!}$	Dimensions	Electric charge		Symmetrical property
		neutral	loaded
Standard model ( Higgs boson )	rel. light	${\displaystyle {\tilde {h}}^{0}}$	-	Scalar
MSSM	heavy	${\displaystyle {\tilde {H}}^{0}}$	${\displaystyle {\tilde {H}}^{+},{\tilde {H}}^{-}}$
		${\displaystyle {\tilde {A}}^{0}}$	-	Pseudoscalar

Mixture to mass eigenstates

Due to matching quantum numbers ( spin , electrical and color charge ), the Higgsinos mix as interaction eigenstates with the unobservable Gaugino superpartners of the W and B fields, the Winos and the Bino , to the following observable mass eigenstates : ${\displaystyle {\tilde {W}}}$ ${\displaystyle {\tilde {B}}}$

• four electrically neutral Majorana fermions : the Neutralinos or (from the neutral Gauginos and or the Photino and the Zino and the neutral Higgsinos and or and ) ${\displaystyle {\tilde {\chi }}_{1}^{0}\dots {\tilde {\chi }}_{4}^{0}}$ ${\displaystyle {\tilde {N}}_{1}^{0}\dots {\tilde {N}}_{4}^{0}}$
  ${\displaystyle {\tilde {W}}^{0}}$ ${\displaystyle {\tilde {B}}^{0}}$ ${\displaystyle {\tilde {\gamma }}}$ ${\displaystyle {\tilde {Z}}^{0}}$ ${\displaystyle {\tilde {h}}^{0}}$ ${\displaystyle {\tilde {H}}^{0}}$ ${\displaystyle {\tilde {H}}_{a}^{0}}$ ${\displaystyle {\tilde {H}}_{b}^{0}}$
• two pairs of electrically charged Dirac fermions : the Charginos / and / or / and / (from the charged Gauginos and or and as well as the charged Higgsinos and ). ${\displaystyle {\tilde {\chi }}_{1}^{+}}$ ${\displaystyle {\tilde {\chi }}_{1}^{-}}$ ${\displaystyle {\tilde {\chi }}_{2}^{+}}$ ${\displaystyle {\tilde {\chi }}_{2}^{-}}$ ${\displaystyle {\tilde {C}}_{1}^{+}}$ ${\displaystyle {\tilde {C}}_{1}^{-}}$ ${\displaystyle {\tilde {C}}_{2}^{+}}$ ${\displaystyle {\tilde {C}}_{2}^{-}}$
  ${\displaystyle {\tilde {W}}^{1}}$ ${\displaystyle {\tilde {W}}^{2}}$ ${\displaystyle {\tilde {W}}^{+}}$ ${\displaystyle {\tilde {W}}^{-}}$ ${\displaystyle {\tilde {H}}^{+}}$ ${\displaystyle {\tilde {H}}^{-}}$

In contrast, in the standard model, no Higgs fields are necessary for the mixing of the corresponding fields of the electroweak interaction as a result of spontaneous symmetry breaking to be observable:

• Mixing of the fields W ⁰ and B ⁰ to form the neutral Z bosons and photons
• Mixing of fields W ¹ and W ² to form the charged W ⁺ and W ^- bosons .

Footnotes

1. ↑ Even the minimal supersymmetric standard model (MSSM) requires several Higgs fields, see Higgs particles in the MSSM .