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arXiv 1801.09402hep-ph
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$\sqrt{s}=7$ TeV上PDMATHAAB碰撞中低$p_{T}$粲夸克强子化的新特征

New feature of low $p_{T}$ charm quark hadronization in $pp$ collisions at $\sqrt{s}=7$ TeV

Jun Song, Hai-hong Li, Feng-lan Shao

备注：
7 pages, 5 figures. arXiv admin note: text overlap with arXiv:1712.08921
发表信息：
Eur. Phys. J. C (2018) 78: 344
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摘要：

把能很好地描述$\sqrt{s}=7$ TeV的$pp$碰撞中轻味强子数据的轻味组分夸克和反夸克作为色性中和低横动量粲夸克的潜在源（$p_{T}$），我们证明了单粲强子$D^{0,+}$，$D^{*+}$ $D_{s}^{+}$，在$\sqrt{s}=7$ TeV的$pp$碰撞中，低$p_{T}$范围（$2\lesssim p_{T}\lesssim7$ GeV/ $c$）的中快度$Λ_{c}^{+}$和$Ξ_{c}^{0}$可以通过微扰产生的魅夸克与那些轻味组分夸克和反夸克的等速组合得到很好的理解。这表明了一个可能的新的方案，低$p_{T}$粲夸克强子化，在传统的碎裂机制，在$pp$碰撞在LHC能量。这也是对LHC能区$pp$碰撞中产生的小部分子系统的有效组分夸克自由度展示的另一个支持。

英文摘要：

Treating the light-flavor constituent quarks and antiquarks that can well describe the data of light-flavor hadrons in $pp$ collisions at $\sqrt{s}=7$ TeV as the underlying source of chromatically neutralizing the charm quarks of low transverse momenta ($p_{T}$), we show that the experimental data of $p_{T}$ spectra of single-charm hadrons $D^{0,+}$, $D^{*+}$ $D_{s}^{+}$, $Λ_{c}^{+}$ and $Ξ_{c}^{0}$ at mid-rapidity in the low $p_{T}$ range ($2\lesssim p_{T}\lesssim7$ GeV/$c$) in $pp$ collisions at $\sqrt{s}=7$ TeV can be well understood by the equal-velocity combination of perturbatively-created charm quarks and those light-flavor constituent quarks and antiquarks. This suggests a possible new scenario of low $p_{T}$ charm quark hadronization, in contrast to the traditional fragmentation mechanism, in $pp$ collisions at LHC energies. This is also another support for the exhibition of the effective constituent quark degrees of freedom for the small parton system created in $pp$ collisions at LHC energies.

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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