On the Application of Gluon to Heavy Quarkonium Fragmentation Functions

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dc.creatorQi, W.
dc.creatorQiao, C. F.
dc.creatorWang, J. X.
dc.date2007-01-31
dc.date2007-02-02
dc.date.accessioned2026-07-07T11:59:00Z
dc.date.available2026-07-07T11:59:00Z
dc.descriptionWe analyze the uncertainties induced by different definitions of the momentum fraction $z$ in the application of gluon to heavy quarkonium fragmentation function. We numerically calculate the initial $g \to J / ψ$ fragmentation functions by using the non-covariant definitions of $z$ with finite gluon momentum and find that these fragmentation functions have strong dependence on the gluon momentum $\vec{k}$. As $| \vec{k} | \to \infty$, these fragmentation functions approach to the fragmentation function in the light-cone definition. Our numerical results show that large uncertainties remains while the non-covariant definitions of $z$ are employed in the application of the fragmentation functions. We present for the first time the polarized gluon to $J/ψ$ fragmentation functions, which are fitted by the scheme exploited in this work.
dc.description11 pages, 7 figures;added reference for sec. 1
dc.identifierhttps://arxiv.org/abs/hep-ph/0701264
dc.identifierhttp://arxiv.org/abs/hep-ph/0701264
dc.identifierPhys.Rev.D75:074012,2007
dc.identifierdoi:10.1103/PhysRevD.75.074012
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206415
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOn the Application of Gluon to Heavy Quarkonium Fragmentation Functions
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