$\Upsilon(nS)$ and $\chi_b(nP)$ production at hadron colliders in nonrelativistic QCD
Abstract
and (n=1,2,3) production at the LHC is studied at next-to-leading order in in nonrelativistic QCD. Feeddown contributions from higher and states are all considered for lower cross sections and polarizations. The long distance matrix elements (LDMEs) are extracted from the yield data, and then used to make predictions for the polarizations, which are found to be consistent with the measured polarization data within errors. In particular, the polarization puzzle can be understood by a large feeddown contribution from states. Our results may provide a good description for both cross sections and polarizations of prompt and production at the LHC.
Keywords
Cite
@article{arxiv.1410.8537,
title = {$\Upsilon(nS)$ and $\chi_b(nP)$ production at hadron colliders in nonrelativistic QCD},
author = {H. Han and Y. Q. Ma and C. Meng and H. S. Shao and Y. J. Zhang and K. T. Chao},
journal= {arXiv preprint arXiv:1410.8537},
year = {2016}
}
Comments
The text and abstract are substantially changed due to the change in the fitting procedure: we now extract LDMEs of $\Upsilon(nS)$ and $\chi_b{nP}$ by fitting the yield data of the LHC (including cross sections measured by ATLAS, CMS, and LHCb), and then make predictions for the polarizations of $\Upsilon(nS)$