upsilon$88824$ - tradução para Inglês
PARTICLE
Upsilon particles; Upsilon particle; ϒ meson
upsilon
n. Upsilon (20. Buchstabe im griechischen Alphabet)
Definição
upsilon
[?p's??l?n, ju:p-, '?ps?l?n, 'ju:p-]
¦ noun the twentieth letter of the Greek alphabet (?, ?), transliterated as 'u' or (chiefly in English words derived through Latin) as 'y'.
Origin
Gk, lit. 'slender U', from psilos 'slender', referring to the need to distinguish upsilon from the diphthong oi: in late Gk the two had the same pronunciation.
Wikipédia
Upsilon meson
The Upsilon meson (
ϒ
) is a quarkonium state (i.e. flavourless meson) formed from a bottom quark and its antiparticle. It was discovered by the E288 experiment team, headed by Leon Lederman, at Fermilab in 1977, and was the first particle containing a bottom quark to be discovered because it is the lightest that can be produced without additional massive particles. It has a lifetime of 1.21×10−20 s and a mass about 9.46 GeV/c2 in the ground state.
