QCD factorization for high heavy quarkonium production
arXiv:1509.05907
Abstract
In this talk, we present the QCD factorization formula for heavy quarkonium production at large with factorized leading-power and next-to-leading power contributions in the expansion. We show that the leading order analytical calculations in this QCD factorization approach can reproduce effectively the full next-to-leading order numerical results derived using non-relativistic QCD (NRQCD) factorization formalism. We demonstrate that the next-to-leading power contributions are crucial to the description of the channels that are the most relevant for the rate as well as polarization of production at current collider energies.
Acknowledgements added. arXiv admin note: text overlap with arXiv:1407.0383