It often denotes charge density for a line of charge.
This Greek letter names a family of baryons that have an up, down, and another quark. The "superscript 0" form of that family of particles had an unexpectedly long lifetime, which led to the discovery of strangeness. This Greek letter names a theory that at its simplest involves six parameters, including the scalar spectral index, and is based on the FLRW solution of Einstein's field equations. That theory models the (*) expansion of the universe and is generally considered the standard model of Big Bang cosmology. This Greek letter names that model, which features cold dark matter, and it also denotes the cosmological constant. It often denotes charge density for a line of charge. Lagrange multipliers are denoted by, for 10 points, what Greek letter that also denotes the eigenvalues of a matrix?
This Greek letter names a family of baryons that have an up, down, and another quark.
lambda