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Article overview
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NLO+NLL limits on W' and Z' gauge boson masses in general extensions of the Standard Model | | T. Jezo
; M.Klasen
; D.R. Lamprea
; F. Lyonnet
; I. Schienbein
; | | Date: |
17 Oct 2014 | | Abstract: | QCD resummation predictions for the production of charged (W’) and neutral
(Z’) heavy gauge bosons decaying leptonically are presented. The results of our
resummation code at next-to-leading order and next-to-leading logarithmic
(NLO+NLL) accuracy are compared to Monte Carlo predictions obtained with PYTHIA
at leading order (LO) supplemented with parton showers (PS) and FEWZ at NLO and
next-to-next-to-leading order (NNLO) for the $p_T$-differential and total cross
sections in the Sequential Standard Model (SSM) and general SU(2)xSU(2)xU(1)
models. The LO+PS Monte Carlo and NNLO fixed-order predictions are shown to
agree approximately with those at NLO+NLL at small and intermediate $p_T$,
respectively, and the importance of resummation for total cross sections is
shown to increase with the gauge boson mass. The theoretical uncertainties are
estimated by variations of the renormalisation/factorisation scales and of the
parton densities, the former being significantly reduced by the resummation
procedure. New limits at NLO+NLL on W’ and Z’ boson masses are obtained by
reinterpreting the latest ATLAS and CMS results in general extensions of the
Standard Model. | | Source: | arXiv, 1410.4692 | | Services: | Forum | Review | PDF | Favorites | |
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