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来自对撞机数据的带电强子碎裂函数：NNPDF合作组

Charged hadron fragmentation functions from collider data: NNPDF Collaboration.

作者信息

Bertone V, Hartland N P, Nocera E R, Rojo J, Rottoli L

机构信息

1Department of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands.

2Nikhef Theory Group, Science Park 105, 1098 XG Amsterdam, The Netherlands.

出版信息

Eur Phys J C Part Fields. 2018;78(8):651. doi: 10.1140/epjc/s10052-018-6130-4. Epub 2018 Aug 16.

DOI:10.1140/epjc/s10052-018-6130-4
PMID:30197571
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6113698/
Abstract

We present NNFF1.1h, a new determination of unidentified charged-hadron fragmentation functions (FFs) and their uncertainties. Experimental measurements of transverse-momentum distributions for charged-hadron production in proton-(anti)proton collisions at the Tevatron and at the LHC are used to constrain a set of FFs originally determined from electron-positron annihilation data. Our analysis is performed at next-to-leading order in perturbative quantum chromodynamics. We find that the hadron-collider data is consistent with the electron-positron data and that it significantly constrains the gluon FF. We verify the reliability of our results upon our choice of the kinematic cut in the hadron transverse momentum applied to the hadron-collider data and their consistency with NNFF1.0, our previous determination of the FFs of charged pions, kaons, and protons/antiprotons.

摘要

我们展示了NNFF1.1h，这是对未识别带电强子碎裂函数（FFs）及其不确定性的一种新的确定。在Tevatron和大型强子对撞机（LHC）上质子 - （反）质子碰撞中带电强子产生的横向动量分布的实验测量，被用于约束一组最初从电子 - 正电子湮灭数据确定的FFs。我们的分析是在微扰量子色动力学的次领头阶进行的。我们发现强子对撞机数据与电子 - 正电子数据一致，并且它显著地约束了胶子FF。我们通过对应用于强子对撞机数据的强子横向动量运动学截断的选择，验证了我们结果的可靠性，以及它们与NNFF1.0（我们之前对带电π介子、K介子和质子/反质子FFs的确定）的一致性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/64635508bddd/10052_2018_6130_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/397a4146c235/10052_2018_6130_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/de90bfbcc6a4/10052_2018_6130_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/0503e41ec2d5/10052_2018_6130_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/b2f5d5d317fc/10052_2018_6130_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/a993c9199ead/10052_2018_6130_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/9590635f5401/10052_2018_6130_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/ae8835617a6b/10052_2018_6130_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/64635508bddd/10052_2018_6130_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/397a4146c235/10052_2018_6130_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/de90bfbcc6a4/10052_2018_6130_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/0503e41ec2d5/10052_2018_6130_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/b2f5d5d317fc/10052_2018_6130_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/a993c9199ead/10052_2018_6130_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/9590635f5401/10052_2018_6130_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/ae8835617a6b/10052_2018_6130_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/950a/6113698/64635508bddd/10052_2018_6130_Fig8_HTML.jpg

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本文引用的文献

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Eur Phys J C Part Fields. 2017;77(10):663. doi: 10.1140/epjc/s10052-017-5199-5. Epub 2017 Oct 4.
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A determination of the fragmentation functions of pions, kaons, and protons with faithful uncertainties: The NNPDF Collaboration.对π介子、K介子和质子的碎裂函数进行具有可靠不确定性的测定：NNPDF合作组。
Eur Phys J C Part Fields. 2017;77(8):516. doi: 10.1140/epjc/s10052-017-5088-y. Epub 2017 Aug 3.
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Next-to-Next-to Leading Order QCD Predictions for Single Jet Inclusive Production at the LHC.
大型强子对撞机上单喷注全包含产生的次下一个领头阶量子色动力学预测。
Phys Rev Lett. 2017 Feb 17;118(7):072002. doi: 10.1103/PhysRevLett.118.072002.
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