Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/88567
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Type: Journal article
Title: NJL-jet model for quark fragmentation functions
Author: Ito, T.
Bentz, W.
Cloet, I.
Thomas, A.
Yazaki, K.
Citation: Physical Review D: Particles, Fields, Gravitation and Cosmology, 2009; 80(7):074008-1-074008-17
Publisher: American Physical Society
Issue Date: 2009
ISSN: 1550-7998
1550-2368
Statement of
Responsibility: 
T. Ito, W. Bentz, I. C. Cloe, A.W. Thomas, and K. Yazaki
Abstract: A description of fragmentation functions which satisfy the momentum and isospin sum rules is presented in an effective quark theory. Concentrating on the pion fragmentation function, we first explain why the elementary (lowest order) fragmentation process q→qπ is completely inadequate to describe the empirical data, although the crossed process π→qq¯ describes the quark distribution functions in the pion reasonably well. Taking into account cascadelike processes in a generalized jet-model approach, we then show that the momentum and isospin sum rules can be satisfied naturally, without the introduction of ad hoc parameters. We present results for the Nambu–Jona-Lasinio (NJL) model in the invariant mass regularization scheme and compare them with the empirical parametrizations. We argue that the NJL-jet model, developed herein, provides a useful framework with which to calculate the fragmentation functions in an effective chiral quark theory.
Rights: © 2009 The American Physical Society
RMID: 0030009820
DOI: 10.1103/PhysRevD.80.074008
Appears in Collections:Physics publications

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