Speaker
Prof.
Bernd Kniehl
(Univ. Hamburg)
Description
We study the polarization observables of $J/\psi$ hadroproduction
at NLO in NRQCD, including the $^3\!P_J^{[8]}$ channel.
Exploiting the color-octet long-distance matrix elements previously extracted through a global fit to unpolarized $J/\psi$ production
data, we provide theoretical predictions in the helicity and Collins-Soper frames and compare them with data from CDF and ALICE.
The notorious CDF $J/\psi$ polarization anomaly familiar from leading-order analyses persists at the quantum level, while the
situation looks promising for the LHC.
Author
Prof.
Bernd Kniehl
(Univ. Hamburg)
