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The direct production rate of[psi] in the[Upsilon] decay is shown to be dominated by the process[Upsilon][yields] ggg* followed by g*[yields][psi] via the color-octet mechanism proposed recently to explain the anomalous prompt charmonium production at the Tevatron. The authors show that this plausibly dominant process has a branching ratio compatible with the experimental data. Further experimental study in this channel is important to test the significance of the color-octet component of c[anti c] pair inside the[psi] system.
Three recent B physics results at CDF are presented. The first analysis measures the production polarization of the [psi](2S) from its decay into [mu]+[mu]-. The second one determines the [chi]b contribution to the [Upsilon](1S) production. Both analyses are important tests of the Color Octet Model. The third analysis related here is a measurement of the full decay amplitudes of B0 → J/[psi]K*0 and B0s → J/[psi][phi]. This provides both a test of the factorization model and information relevant to CP violation studies in the B sector. All of the results are to be considered preliminary.
The authors report recent results of D*[sup[+-]] meson, J/[psi] and[Upsilon] production at the Fermilab Tevatron. They observe about 8,000 D*[sup[+-]] mesons reconstructed in the decay chain of D*[r-arrow] D[sub[pi]][sup 0], D[sup 0][r-arrow] K[mu]+X. They measure the integrated D*[sup+] production cross section to be 347[+-] 65(stat.)[+-] 58(sys.) nb for the rapidity range[vert-bar][eta](D*[sup+])[vert-bar]1.0 and the transverse momentum range p[sub T] (D*[sup+]) 10 GeV/c. The measurement is slightly higher than the theoretical prediction, especially at lower pT range. We also measure the polarization of J/[psi] at production and find that the measured transverse polarization is not well explained by the color-octet model proposed to explain the anomalously high J/[psi] production cross section. We also present a new result on[Upsilon] production and polarization. Production of the[Upsilon] is consistent with being unpolarized.