Noun
supersymmetry (usually uncountable, plural supersymmetries)
(physics) A theory that attempts to unify the fundamental physical forces and which proposes a physical symmetry between bosons and fermions.
Supersymmetry is a theory which stipulates that for every known particle there should be a partner particle. For instance, the electron should be paired with a supersymmetric 'selectron,' quarks ought to have 'squark' partners, and so on. Brian Greene
As I once told a newspaper reporter, in order to be sure to be quoted: discovery of supersymmetry would be more profound than life on Mars. John Henry Schwarz
Indeed, in 1998, Strominger argued that the original result could be generalized to an arbitrary consistent theory of quantum gravity without relying on strings or supersymmetry. Source: Internet
The resulting theory did not have a tachyon, and was proven to have space-time supersymmetry by John Schwarz and Michael Green in 1981. Source: Internet
But the third, and perhaps most convincing, reason most theorists like supersymmetry is because of unification. Source: Internet
I'm not sure what particular approach Sabine Hossenfelder takes to solving the quantum gravity problem, but I think it's ignorant to say that supersymmetry isn't a "real problem". Source: Internet