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arXiv 1304.4262hep-ph
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唯一介子对产生的微扰动力学探讨

Probing the perturbative dynamics of exclusive meson pair production

L. A. Harland-Lang, V. A. Khoze, M. G. Ryskin, W. J. Stirling

摘要:

我们提出了最近的一个新的应用程序的'硬排他的'微扰形式主义的过程gg --> Mmbar在大角度,其中M(Mbar)是一个轻介子(反介子)的结果。除了讨论相关的首阶gg --> qqbar(gg)qqbar(gg)6-部分子振幅的重要理论特征外,我们还评论了它们的唯象意义。特别地,我们考虑了在相对大的横动量k_t下介子对的中心排他产生,这是通过这种机制进行的。我们表明,这导致各种非平凡的预测范围内的排他性的过程,和截面的eta'和eta介子显示出显着的灵敏度,任何价gg组分的介子波函数。

英文摘要:

We present the results of a recent novel application of the `hard exclusive' perturbative formalism to the process gg --> MMbar at large angles, where M (Mbar) is a light meson (anti-meson). As well as discussing the important theoretical features of the relevant leading-order gg --> qqbar(gg) qqbar(gg) 6-parton amplitudes, we also comment on their phenomenological implications. In particular, we consider the central exclusive production of meson pairs at comparatively large transverse momentum k_t, which is expected to proceed via this mechanism. We show that this leads to various non-trivial predictions for a range of exclusive processes, and that the cross sections for the eta' and eta mesons display significant sensitivity to any valence gg component of the meson wavefunctions.

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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