Tau (particle) Tau (particle) The tau (τ), also called the tau lepton, tau particle, or tauon, is an elementary particle similar to the electron, with negative electric charge and a spin of. Together with the electron, the muon, and the three neutrinos, it is a lepton. Like all elementary particles with half-integer spin, the tau has a corresponding antiparticle of opposite charge but equal mass and spin, which in the tau's case is the antitau (also called the "positive tau"). Tau particles are denoted by and the antitau by . Tau leptons have a lifetime of and a mass of (compared to
Aya (given name) Aya (given name) Aya is a feminine given name with multiple meanings in different languages. In Old German, Aya means "sword". Aya (あや, アヤ) is a common female Japanese given name meaning "design", "colorful" or "beautiful". Aya is also in use in the Hebrew language and means "to fly swiftly" or "bird". Aya is also an Arabic feminine name written as آية meaning "wonderful", "amazing", "miracle" or "verse" (of the Quran). In Mongolian, similar to Turkish, it means goodness, music and "melody". In Chemehuevi, Aya means "tortoise". In Baoule on the Ivory Coast, Aya is given to the female born