TY - JOUR

T1 - Consistency check of charged hadron multiplicities and fragmentation functions in SIDIS

AU - Yang, Dong Jing

AU - Jiang, Fu Jiun

AU - Chang, Wen Chen

AU - Kao, Chung Wen

AU - Nam, Seung il

N1 - Funding Information:
We would like to thank Gunar Schnell for helpful comments and suggestions. The work of S. i. N. is in part supported by the NRF grant funded by MEST (Center for Korean J-PARC Users, Grant No. NRF-2013K1A3A7A06056592 ). C.W.K. and D.J.Y. are supported by the grant 102-2112-M-033-005-MY3 from Ministry of Science and Technology ( MOST ) of Taiwan. F.J.J. is supported by MOST of Taiwan (grant No. 102-2112-M-003-004-MY3 ).
Publisher Copyright:
© 2016 The Authors.

PY - 2016/4/10

Y1 - 2016/4/10

N2 - We derived the conditions on certain combinations of integrals of the fragmentation functions of pion using HERMES data for the sum of 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, we find that the fragmentation functions produced by the nonlocal chiral-quark model (NLχQM) constantly satisfy the conditions. Furthermore, the ratios of the strange PDFs S(x, Q2) and the non-strange PDFs Q(x, Q2) extracted from the charged pion and kaon multiplicities differ from each other significantly. Finally, we demonstrate that the HERMES pion multiplicity data are unlikely to be compatible with two widely-used PDFs, namely CTEQ6L and leading order NNPDF3.0.

AB - We derived the conditions on certain combinations of integrals of the fragmentation functions of pion using HERMES data for the sum of 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, we find that the fragmentation functions produced by the nonlocal chiral-quark model (NLχQM) constantly satisfy the conditions. Furthermore, the ratios of the strange PDFs S(x, Q2) and the non-strange PDFs Q(x, Q2) extracted from the charged pion and kaon multiplicities differ from each other significantly. Finally, we demonstrate that the HERMES pion multiplicity data are unlikely to be compatible with two widely-used PDFs, namely CTEQ6L and leading order NNPDF3.0.

KW - Charged hadron multiplicity

KW - DGLAP evolution

KW - Nonlocal chiral-quark model

KW - Parton distribution functions

KW - Pion and kaon fragmentation functions

KW - Semi-inclusive deeply-inelastic scattering

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U2 - 10.1016/j.physletb.2016.02.046

DO - 10.1016/j.physletb.2016.02.046

M3 - Article

AN - SCOPUS:84959431477

SN - 0370-2693

VL - 755

SP - 393

EP - 402

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -