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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:In the current work, spectroscopy and the possibility of observation at the LHC of tetraquarks composed of four heavy quarks are discussed. The tetraquarks concerned are T4c=[cc][c̅ c̅ ], T4b=[bb][b̅ b̅ ], and T2[bc]=[bc][b̅ c]̅ . By solving the nonrelativistic Schrödinger equation, masses of these states are found with the hyperfine splitting that is accounted for. It is shown that masses of tensor tetraquarks T4c(2++) and T2[bc](2++) are high enough to observe these states as peaks in the invariant mass distributions of heavy quarkonia pairs in pp→T4c+X→2J/ψ+X, pp→T2[bc]+X→2Bc+X and pp→T2[bc]+X→J/ψΥ(1S)+X channels, while T4b is under the threshold of decay into a vector bottomonia pair.