QCD corrections to excited lepton (pair) production at LHC

Abstract

We consider excited lepton ($\overline{l^{\ast }}l\mathrm{or}\overline{l^{\ast }}{l}^{\ast }$) production in the context of effective theories with being four-fermion contact interaction at LHC. We also consider the two body decay mode of excited lepton ($l^{\ast }$) to standard model fermion($l$) and a gauge boson $V(\equiv \gamma ,Z,W)$. We have performed next-to-leading order (NLO) QCD corrections to this process. In spite of non-renormalizable nature of the interaction, the higher order QCD corrections are possible and meaningful. We have shown that these corrections can be substantial and significant. By considering the issue of scale dependence, it is shown that the scale dependence of the NLO cross sections are greatly reduced as compare to leading order (LO) cross section.

15 pages, 9 figures. modified the text, some typos corrected, improved version submitted

References in corpus (5)

• Parton distributions for the LHC
• Search for excited electrons in ppbar collisions at sqrt(s) = 1.96 TeV
• Search for excited leptons in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for Excited Muons in ppbar Collisions at sqrt(s) = 1.96 TeV
• Search for excited leptons in e+e- collisions at sqrt{s}=189-209 GeV

Cited by in corpus (2)

• Search for excited leptons in proton-proton collisions at sqrt(s) = 8 TeV
• Search for excited leptons in $\ell \ell \gamma$ final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV