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High Energy Physics - Phenomenology

arXiv:1511.08026 (hep-ph)
[Submitted on 25 Nov 2015]

Title:Consistency check of charged hadron multiplicities and fragmentation functions in SIDIS

Authors:Dong-Jing Yang, Fu-Jiun Jiang, Wen-Chen Chang, Chung-Wen Kao, Seung-il Nam
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Abstract:We derived the conditions on certain combinations of integrals of the fragmentation functions of pion using HERMES data of the sum for the charged pion multiplicities from semi-inclusive deep-inelastic scattering (SIDIS) off the deuteron target. In our derivation the nucleon parton distribution functions (PDFs) are assumed to be isospin SU(2) symmetric. Similar conditions have also been obtained for the fragmentation functions (FFs) of kaon by the sum of charged kaon multiplicities as well. We have chosen several FFs to study the impact of those conditions we have derived. Among those FFs, only that produced in the nonlocal chiral-quark model (NL$\chi$QM) constantly satisfy the conditions. Furthermore, the ratios of the strange PDFs $S(x)$ and the nonstrange PDFs $Q(x,Q^2)$ extracted from the charged pion and kaon multiplicities differ from each other significantly. Finally, we demonstrate that the HERMES pion multiplicity data is unlikely to be compatible with the two widely-used PDFs, namely CTEQ6M and NNPDF3.0.
Comments: 11 pages, 5 figs
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex); Nuclear Theory (nucl-th)
Report number: CYCU-HEP-15-10
Cite as: arXiv:1511.08026 [hep-ph]
  (or arXiv:1511.08026v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1511.08026
Related DOI: https://doi.org/10.1016/j.physletb.2016.02.046

Submission history

From: Chung Wen Kao [view email]
[v1] Wed, 25 Nov 2015 12:05:40 UTC (1,051 KB)
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