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Revisiting the large extra dimension effects on $W$-pair production at the LHC in NLO QCD | | Bai Yu-Ming
; Guo Lei
; Li Xiao-Zhou
; Ma Wen-Gan
; Zhang Ren-You
; | | Date: |
21 Dec 2011 | | Abstract: | In the framework of the large extra dimensions (LED) model, we investigate
the effects induced by the Kaluza-Klein (KK) gravitons up to the QCD
next-to-leading order (NLO) on the $W$-pair production followed by a
subsequential $W$-decay at the CERN LHC. We depict the regions in the
$mathcal{L}-M_{S}$ parameter space where the LED effect can and cannot be
observed from the analyses of the $pp o W^+W^- + X$ and $pp o W^+W^- o
W^{pm}l^{mp}stackrel{(-)}{
u} + X$ processes. We find that the ability of
probing the LED effects can be improved by taking the cutoffs for the invariant
mass of $W$-pair and the transverse momentum of the final lepton. Our results
demonstrate that the NLO QCD corrections to observables are significant, and do
not show any improvement for the renormalization/factorization scale
uncertainty on the QCD NLO corrected cross section, because the LO result
underestimates the scale dependence. | | Source: | arXiv, 1112.4894 | | Services: | Forum | Review | PDF | Favorites | |
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