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arXiv 1007.4395hep-ph
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高能散射截面的端点行为

Endpoint behavior of high-energy scattering cross sections

Junegone Chay, Chul Kim

摘要:

在接近终点的高能过程中,出现了与旁观者相互作用相关的新贡献。远离端点区域,这些新的贡献与领先贡献相比被抑制,但是当我们接近端点时,领先贡献被抑制,并且新的贡献变得可比较。我们提出了如何新的贡献规模,因为我们到达终点,并表明它们是可比的抑制领先的贡献,在深非弹性散射采用功率计数分析。深度非弹性散射中的强子张量被证明是包含旁观者相互作用的因子分解,它可以用初始强子的光锥分布振幅来表示。我们还考虑了Drell-Yan过程中旁观者贡献的贡献。在这里,观众的相互作用被抑制相比,根据功率计数的双部分子湮灭。

英文摘要:

In high-energy processes near the endpoint, there emerge new contributions associated with spectator interactions. Away from the endpoint region, these new contributions are suppressed compared to the leading contribution, but the leading contribution becomes suppressed as we approach the endpoint and the new contributions become comparable. We present how the new contributions scale as we reach the endpoint and show that they are comparable to the suppressed leading contributions in deep-inelastic scattering by employing a power counting analysis. The hadronic tensor in deep-inelastic scattering is shown to factorize including the spectator interactions, and it can be expressed in terms of the lightcone distribution amplitudes of initial hadrons. We also consider the contribution of the spectator contributions in Drell-Yan processes. Here the spectator interactions are suppressed compared to double parton annihilation according to the power counting.

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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