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- W1496428243 abstract "In this work, we present more details of the calculation on the next-to-leading-order (NLO) QCD corrections to polarization of direct $J/ensuremath{psi}$ production via color singlet at the Tevatron and LHC, together with the results for $ensuremath{Upsilon}$ for the first time. Our results show that the $J/ensuremath{psi}$ polarization status drastically changes from transverse polarization dominant at leading order into longitudinal polarization dominant in the whole range of the transverse momentum ${p}_{t}$ of $J/ensuremath{psi}$ when the NLO corrections are counted. For $ensuremath{Upsilon}$ production, the ${p}_{t}$ distribution of the polarization status behaves almost the same as that for $J/ensuremath{psi}$ except that the NLO result is transverse polarization at small ${p}_{t}$ range. Although the theoretical evaluation predicts a larger longitudinal polarization than the measured value at the Tevatron, it may provide a solution towards the previous large discrepancy for $J/ensuremath{psi}$ and $ensuremath{Upsilon}$ polarization between theoretical prediction and experimental measurement, and suggests that the next important step is to calculate the NLO corrections to hadronproduction of color-octet state $J/{ensuremath{psi}}^{(8)}$ and ${ensuremath{Upsilon}}^{(8)}$. Our calculations are performed in two ways: namely, we do and do not analytically sum over the polarizations, and then check them with each other." @default.
- W1496428243 created "2016-06-24" @default.
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- W1496428243 date "2008-10-10" @default.
- W1496428243 modified "2023-10-16" @default.
- W1496428243 title "QCD corrections to polarization of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math>and<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>Υ</mml:mi></mml:math>at Fermilab Tevatron and CERN LHC" @default.
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- W1496428243 doi "https://doi.org/10.1103/physrevd.78.074011" @default.
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