Associated production of $\Upsilon(1S)W$ at LHC in next-to-leading order QCD

TL;DR

This paper calculates the next-to-leading order QCD corrections to the associated production of $5S$ and W bosons at the LHC, predicting transverse momentum distributions and highlighting the significance of direct and indirect production contributions.

Contribution

The study provides the first comprehensive NLO QCD analysis of $5S + W$ production at the LHC, including feed-down effects and differential cross sections.

Findings

QCD corrections significantly enhance the LO differential cross section.

The $b\bar{b} [ ^3S_1^{(8)} ]$ component dominates the $p_T^{\Upsilon(1S)}$ region.

Indirect production via feed-down decays is an important contribution.

Abstract

We investigate the complete next-to-leading order (NLO) QCD corrections to $\Upsilon(1S) +W$ production at the LHC, and predict theoretically the distribution of the $\Upsilon(1S)$ transverse momentum. We analyse the contributions from different components up to the QCD NLO in the \ppUW process. Our results show that the \ppUW process has a large production rate and could be potentially detected at the LHC. We see that the differential cross section for the $\Upsilon(1S)$ direct-production at the LO is significantly enhanced by the QCD corrections, and the $b\bar{b} [ ^3S_1^{(8)} ]$ contribution component dominates in the whole plotted $p_T^{\Upsilon(1S)}$ region. We have also calculated the $\Upsilon(1S)$ meson indirect-productions via feed-down decays of $\Upsilon(2S)$, $\Upsilon(3S)$, $\chi_{b1}(1P)$, $\chi_{b2}(1P)$, $\chi_{b1}(2P)$, and $\chi_{b2}(2P)$ mesons. We find that the $\Upsilon(1S)$ indirect-productions can give important contributions to the distribution of $p_T^{\Upsilon(1S)}$ for the \ppUW process at the NLO. We conclude that the studying the $\Upsilon(1S)+W$ production at the LHC could provide an interesting opportunity in testing the nonrelativistic QCD factorization formalism.