Abstract
We consider the associated production at the 14 TeV LHC in the littlest Higgs model (LHM) and study the corrections of the transverse momentum resummation and threshold resummation at the next-to-leading logarithmic (NLL) accuracy and the fixed-order prediction at the QCD next-to-leading order (NLO) including the contribution from the one-loop-induced -fusion channel. The QCD effects on the integrated cross section and the distributions of transverse momentum and invariant mass of the system for the production in the LHM are discussed. The distributions of transverse momentum and invariant mass of the system are evaluated by means of the transverse momentum resummation and threshold resummation, respectively. We estimate their scale uncertainties and find that the predictions obtained at the QCD accuracy are much more reliable than those using the pure NLO approach. We see also that the relative deviation between the results in the LHM and the standard model is considerably reduced by the resummation effects, but still observable.
1 More- Received 27 June 2016
DOI:https://doi.org/10.1103/PhysRevD.94.074020
© 2016 American Physical Society