photino, n. Particle Physics.
(fəʊˈtiːnəʊ)
[f. photon n.1 + *-ino.]
The supersymmetric counterpart of a photon, with spin ½ instead of 1.
| 1977 [see *gluino n.]. 1985 Nature 3 Oct. 411/2 In supersymmetric (SUSY) theories, the photino is the fermion partner of the photon and is expected to be the lightest stable particle. 1986 Ann. Reg. 1985 390 If the sub-atomic universe were perfectly symmetrical, evidence was needed of the existence of so-far undiscovered particles to balance the properties of known particles; ‘squarks’ to balance quarks and photinos to balance photons, for example. 1989 M. Longair in P. Davies New Physics vi. 205/2 One of the few ways of detecting hypothetical particles such as axions and photinos may be through the measurement of cosmic fluxes of these particles. |