Resummation prediction on gauge boson pair production with a jet veto

TL;DR

This paper studies how jet veto resummation affects gauge boson pair production at the LHC, showing it increases cross sections, reduces uncertainties, and aligns theory with experimental data.

Contribution

It provides next-to-next-to-leading-logarithmic resummation results for WZ and ZZ production with jet vetoes, improving theoretical predictions and explaining experimental discrepancies.

Findings

Jet veto resummation increases cross sections by ~18-19%.

Resummation reduces scale uncertainties, especially at high energies.

Results agree with CMS data within 2σ at 8 TeV.

Abstract

We investigate the resummation effects with a jet veto, for WZ and ZZ productions at the LHC in soft-collinear effective theory. We present the invariant mass distributions and the total cross section with different jet veto and jet radius for these process at Next-to-Next-to-Leading-Logarithmic level. Our results show that the jet-veto resummation can increase the jet-veto cross section and decrease the scale uncertainties, especially in the large center-of-mass energy. We find that for pt_veto>30 GeV and R=0.4, the resummation results can increase POWHEG+PYTHIA predictions by about 19% for WZ production and 18% for ZZ production, respectively. Our results agree with the CMS data for WZ productions within 2$\sigma$ C.L. at 8 TeV, which can explain the 2$\sigma$ discrepancy between the CMS experimental results and theoretical predictions based on NLO calculation with parton showers.