Chargino

In particle physics, the chargino is a hypothetical particle which refers to the mass eigenstates of a charged superpartner, i.e. any new electrically charged fermion (with spin 1/2) predicted by supersymmetry.[1][2] They are linear combinations of the charged wino and charged higgsinos. There are two charginos that are fermions and are electrically charged, which are typically labeled
C ${\tilde {\chi }}$ ^±
₁ (the lightest) and
C ${\tilde {\chi }}$ ^±
₂ (the heaviest), although sometimes ${\tilde {\chi }}_{1}^{\pm }$ and ${\tilde {\chi }}_{2}^{\pm }$ are also used to refer to charginos, when ${\tilde {\chi }}_{i}^{0}$ is used to refer to neutralinos. The heavier chargino can decay through the neutral Z boson to the lighter chargino. Both can decay through a charged W boson to a neutralino:

C

{\tilde {\chi }}

^±
₂ →
C

{\tilde {\chi }}

^±
₁ +
Z⁰

C

{\tilde {\chi }}

^±
₂ →
N͂⁰
₂ +
W^±

C

{\tilde {\chi }}

^±
₁ →
N͂⁰
₁ +
W^±

References

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. Retrieved 19 June 2020.
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. PMID 16241718. Lay summary.

External links

http://lepsusy.web.cern.ch/lepsusy/www/inoslowdmsummer02/charginolowdm_pub.html
Alloul, Adam; Frank, Mariana; Fuks, Benjamin; De Traubenberg, Michel Rausch (2013). "Chargino and neutralino production at the Large Hadron Collider in left-right supersymmetric models". Journal of High Energy Physics. 2013 (10): 033. arXiv:1307.5073. Bibcode:2013JHEP...10..033A. doi:10.1007/JHEP10(2013)033.

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[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. Retrieved 19 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. PMID 16241718. Lay summary.