Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 18: Beyond the Standard Model (Theorie) III

T 18.3: Talk

Thursday, March 31, 2011, 17:15–17:30, 30.23: 6-1

Measuring spin and CP from semi-hadronic ZZ decays using jet substructure — •Christoph Englert¹, Christoph Hackstein^2,3, and Michael Spannowsky⁴ — ¹Institute for Theoretical Physics, Heidelberg University — ²Institute for Experimental Nuclear Physics, KIT — ³Institute for Theoretical Physics, KIT — ⁴Institute of Theoretical Science, University of Oregon, Eugene

We apply novel jet techniques to investigate the spin and CP quantum numbers of a heavy resonance X, singly produced in pp→ X → ZZ → ℓ⁺ℓ⁻ jj at the LHC. We take into account all dominant background processes to show that this channel, which has been considered unobservable until now, can qualify under realistic conditions to supplement measurements of the purely leptonic decay channels X→ ZZ → 4ℓ. In particular, we find sensitivity to a CP-even or CP-odd scalar resonance, while, for tensorial and vectorial resonances, discriminative features are diminished in the boosted kinematical regime.