Lithium be cut with a knife. When cut, it possesses a silvery-white color that quickly changes to gray as it oxidizes to lithium oxide. While it has one of the lowest melting points among all metals (180 °C), it has the highest melting and boiling points of the alkali metals. Lithium has a very low density (0.534 g/cm), comparable with pine wood. It is the least dense of all elements that are solids at room temperature; the next lightest solid element (potassium, at 0.862 g/cm) is more than 60% denser. Furthermore, apart from helium and hydrogen, it is less dense than
Next-to-Minimal Supersymmetric Standard Model much richer than that of the MSSM. In particular, the Higgs potential is in general no longer invariant under CP transformations; see CP violation. Typically, the Higgs bosons in the NMSSM are denoted in an order with increasing masses; that is, by formula_31, with formula_32 the lightest Higgs boson. In the special case of a CP-conserving Higgs potential we have three CP even Higgs bosons, formula_33, two CP odd ones, formula_34, and a pair of charged Higgs bosons, formula_35. In the MSSM, the lightest Higgs boson is always Standard Model-like, and therefore its production and decays are roughly known. In