Color-Octet Quarkonium Production at the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">Z</mi></math></span> Pole

Kingman Cheung; Wai-Yee Keung; Tzu Chiang Yuan

doi:10.1103/PhysRevLett.76.877

Color-Octet Quarkonium Production at the $Z$ Pole

Kingman Cheung, Wai-Yee Keung, and Tzu Chiang Yuan

Phys. Rev. Lett. 76, 877 – Published 5 February 1996

Abstract

The direct production rate of $J / ψ$ via the color-octet mechanism is calculated at the $Z$ resonance. The color-octet production process $Z \to J / ψ q \bar{q}$ is shown to have a substantial branching ratio as well as a distinctive energy spectrum, which can be used as a powerful tool to distinguish from the color-singlet direct production of the $J / ψ$ .

Received 15 September 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.877

Authors & Affiliations

Kingman Cheung¹, Wai-Yee Keung^2,3, and Tzu Chiang Yuan⁴

¹Center for Particle Physics, University of Texas at Austin, Austin, Texas 78712
²Physics Department, University of Illinois at Chicago, Illinois 60607-7059
³Fermilab, P.O. Box 500, Batavia, Illinois 60510
⁴Davis Institute for High Energy Physics, University of California at Davis, Davis, California 95616