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arXiv 1609.08463nucl-thhep-exhep-ph
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氘核效应与整体PDF拟合

Nuclear Effects in the Deuteron and Global PDF Fits

S. I. Alekhin, S. A. Kulagin, R. Petti

摘要:

通过对质子和氘的荷电轻子深度非弹性散射(DIS)、pp和pD碰撞中双μ子对的产生以及pp(p $\rm \bar p$)对撞机上$W^\pm$和$Z$玻色子产生的数据分析,详细研究了氘的核修正.特别是,我们讨论了在全球范围内的部分子分布(PDF)拟合描述的修改在束缚核子的离壳函数的确定。我们的结果与早先研究含$A\geq4$的原子核中DIS结构函数$F_2^A/F_2^D$的比值所得到的结果一致,证实了离壳层函数的普遍性。我们还讨论了各种模型的氘核波函数的灵敏度和核修正的影响上的$d$夸克分布的测定。

英文摘要:

We present a detailed study of nuclear corrections in the deuteron (D) from an analysis of data from charged-lepton deep-inelastic scattering (DIS) off proton and D, as well as from dimuon pair production in pp and pD collisions and $W^\pm$ and the $Z$ boson production at pp (p$\rm \bar p$) colliders. In particular, we discuss the determination of the off-shell function describing the modification of parton distributions (PDF) in bound nucleons in the context of global PDF fits. Our results are consistent with the ones obtained earlier from the study of the ratios of DIS structure functions $F_2^A/F_2^D$ in nuclei with $A\geq4$, confirming the universality of the off-shell function. We also discuss the sensitivity to various models of the deuteron wave function and the impact of nuclear corrections on the determination of the $d$ quark distribution.

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