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Chargino

From Wikipedia, the free encyclopedia
Hypothetical particle in particle physics
Standard Model ofparticle physics
Elementary particles of the Standard Model

Inparticle physics, thechargino is a hypothetical particle which refers to the masseigenstates of a chargedsuperpartner, i.e. any new electrically chargedfermion (withspin 1/2) predicted bysupersymmetry.[1][2] They arelinear combinations of the chargedwino and chargedhiggsinos. There are two charginos that are fermions and are electrically charged, which are typically labeled
±
1
(the lightest) and
±
2
(the heaviest), although sometimesχ~1±{\displaystyle {\tilde {\chi }}_{1}^{\pm }} andχ~2±{\displaystyle {\tilde {\chi }}_{2}^{\pm }} are also used to refer to charginos, whenχ~i0{\displaystyle {\tilde {\chi }}_{i}^{0}} is used to refer toneutralinos. The heavier chargino can decay through the neutralZ boson to the lighter chargino. Both can decay through a charged W boson to a neutralino:


±
2

±
1
+
Z0

±
2

0
2
+
W±

±
1

0
1
+
W±

See also

[edit]

References

[edit]
  1. ^Klapdor-Kleingrothaus, H. V.; Krivosheina, I. V. (1999).Lepton and Baryon Number Violation in Particle Physics, Astrophysics and Cosmology: Proceedings of the First International Symposium on Lepton and Baryon Number Violation (Lepton-Baryon 98), European Centre for Theoretical Studies (ECT), Trento, Italy, 2. CRC Press. p. 469.ISBN 978-1-4822-6863-8. Retrieved19 June 2020.
  2. ^Abazov, V. M.; et al. (2005)."Search for Supersymmetry via Associated Production of Charginos and Neutralinos in Final States with Three Leptons".Physical Review Letters.95 (15): 151805.arXiv:hep-ex/0504032.Bibcode:2005PhRvL..95o1805A.doi:10.1103/PhysRevLett.95.151805.hdl:10211.3/194402.PMID 16241718.S2CID 11330299.

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