Double gluon fragmentation to $J/\psi$ pairs at the Tevatron

Abstract

It has been proposed that the large cross sections for prompt $\psi$, ${\psi }^{\prime }$, and ${\chi }_c$ production at the Fermilab Tevatron $p\bar{p}$ collider can be explained by a dominant color-octet term in the fragmentation function for a gluon to split into quarkonium. We show that this mechanism makes testable predictions for double-quarkonium $\psi \psi$, $\psi {\psi }^{\prime }$, $\psi {\chi }_c$, $\psi {\rm Y}$ and $\psi {\chi }_b$ production, as well as for $W\psi$ production, using color-octet matrix elements previously determined from charmonium production data. The $\psi \psi$ signal would already be measurable at the Tevatron, while the $\psi {\chi }_c$ and $W\psi$ signals would be on the edge of present detectability.

Revtex, 11 pages, one postscript figure. Compressed postscript file of text with figure available at http://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-911.ps.Z or at ftp://phenom.physics.wisc.edu/pub/preprints/1995/madph-95-911.ps.Z

References in corpus (5)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Color-Octet Fragmentation and the psi' Surplus at the Tevatron
• Quarkonium Wave Functions at the Origin
• Fragmentation production of J/psi and psi' at the Tevatron
• Charmonium Production at the Tevatron

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