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arXiv 0706.2682hep-ph
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饱和衍射深度非弹性散射的统一描述

A unified description of diffractive deep inelastic scattering with saturation

Cyrille Marquet

摘要:

提出了一种新的描述深度非弹性散射中包含衍射的方法。衍射结构函数表示在偶极图片,并包含重夸克的贡献。偶极散射振幅是一个饱和度模型,它适用于DIS数据,当x=10^{-5}时,饱和度Q_s(x)大于1 GeV。q \bar{q} g对衍射最终状态的贡献以这样一种方式建模,即实现大Q ^2和小β限制。在xpom<0.01的情况下,饱和度是相关的,我们得到了HERA数据的无参数描述,卡方/点=1.2。

英文摘要:

We propose a new description of inclusive diffraction in deep inelastic scattering (DIS). The diffractive structure functions are expressed in the dipole picture and contain heavy-quark contributions. The dipole scattering amplitude, a saturation model fitted on inclusive DIS data, features a saturation scale Q_s(x) larger than 1 GeV for x=10^{-5}. The q\bar{q}g contribution to the diffractive final state is modeled in such a way that both the large-Q^2 and small-beta limits are implemented. In the regime xpom<0.01 in which saturation is expected to be relevant, we obtain a parameter-free description of the HERA data with chi^2/points=1.2.

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