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arXiv 1406.3073hep-ph
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SIDIS和Drell-Yan过程的泛非微扰函数

Universal Non-perturbative Functions for SIDIS and Drell-Yan Processes

Peng Sun, Joshua Isaacson, C. -P. Yuan, Feng Yuan

摘要:

通过考虑来自HERMES和COMPASS实验的深度非弹性散射(SIDIS)中半包容强子产生的约束,我们更新了著名的BLNY模型对强子碰撞中低横动量Drell-Yan轻子对产生的拟合.我们遵循Collins-Soper-Sterman(CSS)形式主义和b_*-处方。用一种不同于BLNY的新的泛函形式进行分析,发现了一个与夸克横动量分布有关的普适的非微扰形状因子。这释放了BLNY拟合到Drell-Yan数据与CSS再确认形式主义中来自HERMES/COMPASS的SIDIS数据之间的张力。

英文摘要:

We update the well-known BLNY fit to the low transverse momentum Drell-Yan lepton pair productions in hadronic collisions, by considering the constraints from the semi-inclusive hadron production in deep inelastic scattering (SIDIS) from HERMES and COMPASS experiments. We follow the Collins-Soper-Sterman (CSS) formalism with the b_*-prescription. A universal non-perturbative form factor associated with the transverse momentum dependent quark distributions is found in the analysis with a new functional form different from that of BLNY. This releases the tension between the BLNY fit to the Drell-Yan data with the SIDIS data from HERMES/COMPASS in the CSS resummation formalism.

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