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Next-to-leading order corrections to Wt production and decay | | John Campbell
; Francesco Tramontano
; | | Date: |
28 Jun 2005 | | Journal: | Nucl.Phys. B726 (2005) 109-130 DOI: 10.1016/j.nuclphysb.2005.08.015 | | Subject: | hep-ph | | Abstract: | We present the results of a next-to-leading order calculation of Wt production, including the decays of both the top quark and the W boson. The effects of radiation in the decay of the top quark are also included. The separation of diagrams which appear in the real corrections, into singly- and doubly-resonant contributions, is performed using a b-jet veto which is motivated by the use of the bottom quark distribution function. We find that, for a choice of scale which is suitable for this approach, the QCD corrections are very mild and only change the cross section by up to 10% at the LHC, depending on the severity of the b-jet veto. When further cuts are applied, applicable for a Higgs boson search in the H->WW channel, we find that the radiative effects greatly decrease the number of background events expected from this process. In addition, the shapes of relevant distributions can be significantly changed at next-to-leading order. | | Source: | arXiv, hep-ph/0506289 | | Services: | Forum | Review | PDF | Favorites | |
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