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Charm-sea Contribution to High-p_T ψProduction at the Fermilab Tevatron

Cong-Feng Qiao

Abstract

The direct production of $J/ψ(ψ')$ at large transverse momentum, $p_T \gg M_{J/ψ}$, at the Fermilab Tevatron is revisited. It is found that the sea-quark initiated processes dominate in the high-$p_T$ region within the framework of color-singlet model, which is not widely realized. We think this finding is enlightening for further investigation on the charmonium production mechanism.

Charm-sea Contribution to High-p_T ψProduction at the Fermilab Tevatron

Abstract

The direct production of at large transverse momentum, , at the Fermilab Tevatron is revisited. It is found that the sea-quark initiated processes dominate in the high- region within the framework of color-singlet model, which is not widely realized. We think this finding is enlightening for further investigation on the charmonium production mechanism.

Paper Structure

This paper contains 9 equations, 1 figure.

Figures (1)

  • Figure 1: Fragmentation Contributions to the differential cross section for direct $J/\psi$ production at the Fermilab Tevatron, compared with the CDF experiment data read from cdf3. The upper curve corresponds to $\mu_R = \mu_F = \mu_{\rm frag} = p_T/2$, while the lower curve to $\mu_R = \mu_F= \mu_{\rm frag} = 2 p_T$.