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theta meson : ウィキペディア英語版
theta meson
:''Not to be confused with the θ+ of the τ–θ puzzle, which is now identified as kaon, or with the Θ+ and , formerly thought to be pentaquarks.''
The theta meson () is a hypothetical form of quarkonium (i.e. a flavourless meson) formed by a top quark and top antiquark. It is the equivalent of the phi (strange quark, strange antiquark), psi (charm quark, charm antiquark) and upsilon (bottom quark, bottom antiquark) mesons. Due to the top quark's shortlifetime, the theta meson is not expected to be observed in nature.
==See also==

*List of mesons


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「theta meson」の詳細全文を読む



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