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arXiv 0908.1142hep-ph
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对“e(+)e(-)相互作用中D(sJ)衰变到D(*)K的研究”一文的评论

Comment on "Study of D(sJ) decays to D(*)K in inclusive e(+)e(-) interactions"

Eef van Beveren, George Rupp

摘要:

我们评论了最近由BABAR协作组[arXiv:0908.0806]对衰变模式D(sJ)(*)(2860)->D(*)K的观测,并对他们的强制性结论提出质疑,即数据排除了D(sJ)(*)(2860)的0(+)归属。特别是,我们认为,观察到的分支分数B(D(sJ)(*)(2860)-->D(*)K)/B(D(sJ)(*)(2860)-->DK)=1.1 pm 0.15 pm 0.19支持在约2.86 GeV的两个大部分重叠的共振,即一对径向激发张量2(+)和标量0(+)c-sbar态的存在。通过与相应的激发粲偶素态的比较,进一步证明了这种情况。还讨论了魅力奇异谱的其他方面。

英文摘要:

We comment on the recent observation of the decay mode D(sJ)(*)(2860)-->D(*)K by the BABAR Collaboration [arXiv:0908.0806], and contest their peremptory conclusion that the data exclude a 0(+) assignment for the D(sJ)(*)(2860). In particular, we argue that the observed branching fraction B(D(sJ)(*)(2860)-->D(*)K)/B(D(sJ)(*)(2860)-->DK)=1.1 pm 0.15 pm 0.19 supports the existence of two largely overlapping resonances at about 2.86 GeV, namely a pair of radially excited tensor 2(+) and scalar 0(+) c-sbar states. This scenario is further justified by comparing with the corresponding excited charmonium states. Also other aspects of the charm-strange spectrum are discussed.

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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