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arXiv 0906.1263hep-ph
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D和D ~* 介子在X(3872)面上的散射

On the scattering of D and D* mesons off the X(3872)

David L. Canham, H. -W. Hammer, Roxanne P. Springer

摘要:

X(3872)的质量(刚好低于D^{*0} D bar^0阈值)和可能的量子数(J^{PC}=1^{++})都表明,它要么是一个弱束缚的强子“分子”,要么是一个粲介子的虚态。假设X(3872)是弱束缚的分子,从X(3872)的束缚能可以预测中性D和D* 介子在X(3872)上的散射。在短程相互作用的有效场论中,我们计算了D ^0和D^{*0}介子及其反粒子在X(3872)表面散射的相移和散射截面。这提供了另一个三体过程的例子,以及核和原子系统中的三体过程,显示出普遍的性质。在B_c衰变和/或其它LHC事件的末态相互作用中提取散射是可能的。

英文摘要:

Both the mass (just below the D^{*0}Dbar^0 threshold) and the likely quantum numbers (J^{PC}=1^{++}) of the X(3872) suggest that it is either a weakly-bound hadronic ``molecule'' or a virtual state of charmed mesons. Assuming the X(3872) is a weakly-bound molecule, the scattering of neutral D and D* mesons off the X(3872) can be predicted from the X(3872) binding energy. We calculate the phase shifts and cross section for scattering of D^0 and D^{*0} mesons and their antiparticles off the X(3872) in an effective field theory for short-range interactions. This provides another example of a three-body process, along with those in nuclear and atomic systems, that displays universal properties. It may be possible to extract the scattering within the final state interactions of B_c decays and/or other LHC events.

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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