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arXiv 1708.01630hep-phhep-ex
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用单粒子包含过程探测质子的海夸克含量

Probing the Sea Quark Content of the Proton with One-Particle-Inclusive Processes

Ignacio Borsa, Rodolfo Sassot, Marco Stratmann

摘要:

通过与半包容的深度非弹性轻子-核子散射数据的比较,我们研究了质子中约束部分子分布函数的可行性。具体来说,我们重新加权这些分布的副本,根据他们如何重现最近,非常精确的收费K介子多重性测量和分析如何优化这个过程的海夸克密度的测定,并提高其不确定性。这一结果有助于解释长期存在的辐射源夸克味的大小和电荷对称性破缺的问题。提出并采用了一种迭代方法来解释重加权过程中部分子到强子碎裂函数与假设的必然相关性。它示出了如何在迭代的每一步中同时优化碎片函数。作为第一个案例研究,我们实现了这种方法来分析K介子生产数据。

英文摘要:

We investigate the feasibility of constraining parton distribution functions in the proton through a comparison with data on semi-inclusive deep-inelastic lepton-nucleon scattering. Specifically, we reweight replicas of these distributions according to how well they reproduce recent, very precise charged kaon multiplicity measurements and analyze how this procedure optimizes the determination of the sea quark densities and improves their uncertainties. The results can help to shed new light on the long standing question on the size of the flavor and charge symmetry breaking among quarks of radiative origin. An iterative method is proposed and adopted to account for the inevitable correlation with what is assumed about the parton-to-hadron fragmentation functions in the reweighting procedure. It is shown how the fragmentation functions can be optimized simultaneously in each step of the iteration. As a first case study, we implement this method to analyze kaon production data.

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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