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arXiv 1507.03565hep-phhep-exnucl-ex
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$D^0 \to π^+ π^- π^0$衰变的奇异等谐共振检验

Test for exotic isoscalar resonance dominating $D^0 \to π^+ π^- π^0$ decays

Michael Gronau, Jonathan L. Rosner

摘要:

衰变$D^0 \to π^+ π^- π^0$似乎是占主导地位的$ρπ$状态的零总同位素自旋的配置。因此,这个末态的自旋$J$、宇称$P$和电荷共轭本征值$C$是$J^{PC} = 0^{--}$,它不能由夸克$q$和反夸克$\bar q$构成。如果在$M(D^0)$附近的共振占主导地位的最终状态,它必须是一个{\it杂化}由夸克-反夸克对和一个胶子组成,或{\it四夸克} $q q \bar q \bar q$。提出了在电生产中对这种谐振的测试。

英文摘要:

The decay $D^0 \to π^+ π^- π^0$ appears to be dominated by $ρπ$ states in a configuration of zero total isotopic spin. The spin $J$, parity $P$, and charge-conjugation eigenvalue $C$ of this final state are therefore $J^{PC} = 0^{--}$, which cannot be formed of a quark $q$ and antiquark $\bar q$. If a resonance near $M(D^0)$ dominates the final state, it must be a {\it hybrid} composed of a quark-antiquark pair and a constituent gluon, or a {\it tetraquark} $q q \bar q \bar q$. A test for this resonance in electroproduction is proposed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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