Search for New Physics via Single Top Production at the LHC

Details Search for New Physics via Single Top Production at the LHC Search for New Physics via Single Top Production at the LHC

2007-04-21

arxiv.org/abs/0704.2809v2

Phys.Lett.B658:50-56,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

version to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2007.10.057

We consider single-top production as a probe for new physics effects at the Large Hadron Collider (LHC). We argue that for natural theories a small deviation from the Standard Model tree-level couplings in this reaction can be parameterized by 3 higher dimension operators. Precision measurement of these effective couplings in the single-top events, via studying their interference effects with the SM contributions, can discriminate several new physics models. In particular, combining the production rate of three single-top production modes will provide a severe test of the Little Higgs model with T-parity. We find that at the LHC, a 5% accuracy in the measurement of the single-top cross sections would probe the new physics scale up to about $3 {\rm TeV}$.

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