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Transverse-momentum-dependent fragmentation and quark distribution functions from the Nambu-Jona-Lasinio-jet model

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dc.contributor.authorMatevosyan, H.
dc.contributor.authorBentz, W.
dc.contributor.authorCloet, I.
dc.contributor.authorThomas, A.
dc.date.issued2012
dc.description.abstractUsing the model of Nambu and Jona-Lasinio to provide a microscopic description of both the structure of the nucleon and of the quark to hadron elementary fragmentation functions, we investigate the transverse-momentum dependence of the unpolarized quark distributions in the nucleon and of the quark to pion and kaon fragmentation functions. The transverse-momentum dependence of the fragmentation functions is determined within a Monte Carlo framework, with the notable result that the average P⊥2 of the produced kaons is significantly larger than that of the pions. We also find that <P⊥2> has a sizable z dependence, in contrast with the naive Gaussian ansatz for the fragmentation functions. Diquark correlations in the nucleon give rise to a nontrivial flavor dependence in the unpolarized transverse-momentum-dependent quark distribution functions. The <kT2> of the quarks in the nucleon are also found to have a sizable x dependence. Finally, these results are used as input to a Monte Carlo event generator for semi-inclusive deep inelastic scattering (SIDIS), which is used to determine the average transverse momentum squared of the produced hadrons measured in SIDIS, namely, <PT2>. Again, we find that the average PT2 of the produced kaons in SIDIS is significantly larger than that of the pions and in each case <PT2> has a sizable z dependence.
dc.description.statementofresponsibilityHrayr H. Matevosyan, Wolfgang Bentz, Ian C. Cloët, and Anthony W. Thomas
dc.identifier.citationPhysical Review D: Particles, Fields, Gravitation and Cosmology, 2012; 85(1):014021-1-014021-13
dc.identifier.doi10.1103/PhysRevD.85.014021
dc.identifier.issn1550-7998
dc.identifier.issn1550-2368
dc.identifier.orcidMatevosyan, H. [0000-0002-4074-7411]
dc.identifier.orcidThomas, A. [0000-0003-0026-499X]
dc.identifier.urihttp://hdl.handle.net/2440/70838
dc.language.isoen
dc.publisherAmerican Physical Soc
dc.relation.granthttp://purl.org/au-research/grants/arc/FL0992247
dc.relation.granthttp://purl.org/au-research/grants/arc/CE110001004 (CoEPP)
dc.rights©2012 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevd.85.014021
dc.titleTransverse-momentum-dependent fragmentation and quark distribution functions from the Nambu-Jona-Lasinio-jet model
dc.typeJournal article
pubs.publication-statusPublished

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