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Type: Journal article
Title: Transverse-momentum-dependent fragmentation and quark distribution functions from the Nambu-Jona-Lasinio-jet model
Author: Matevosyan, H.
Bentz, W.
Cloet, I.
Thomas, A.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2012; 85(1):014021-1-014021-13
Publisher: American Physical Soc
Issue Date: 2012
ISSN: 1550-7998
Statement of
Hrayr H. Matevosyan, Wolfgang Bentz, Ian C. Cloët, and Anthony W. Thomas
Abstract: Using 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.
Rights: ©2012 American Physical Society
RMID: 0020116112
DOI: 10.1103/PhysRevD.85.014021
Grant ID: (CoEPP)
Appears in Collections:Physics publications

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