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Polarizations of J/psi and psi' in hadroproduction at Tevatron in the k_t factorization approach | | Feng Yuan
; Kuang-Ta Chao
; | | Date: |
19 Sep 2000 | | Journal: | Phys.Rev.Lett. 87 (2001) 022002 | | Subject: | hep-ph | | Affiliation: | Heidelberg), Kuang-Ta Chao (PKU | | Abstract: | We present a calculation for the polarizations of $J/psi$ and $psi’$ produced in the hadron collisions at the Fermilab Tevatron. Various color octet channels including ${}^1S_0^{(8)}$, ${}^3P_J^{(8)}$, and ${}^3S_1^{(8)}$ as well as contributions from $chi_{cJ}$ decays are considered in the $k_t$ factorization approach. We find that in a rather wide range of the transverse momenta of $J/psi$ and $psi’$, the production rates could be dominated by the ${}^1S_0^{(8)}$ channel, and the predicted polarizations from the ${}^1S_0^{(8)}$ channel and $chi_{cJ}$ feeddown contributions are roughly compatible with the preliminary CDF data. This might provide a possible release from the conflict between the NRQCD collinear parton model calculations and the CDF data. | | Source: | arXiv, hep-ph/0009224 | | Services: | Forum | Review | PDF | Favorites | |
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