In QCH models the large enhancement expected in gg to ZZ cancels once the correct i epsilon branch is used, while gg to HZ develops an order-of-magnitude excess at high invariant mass.
Unparticle signals with a few particles
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abstract
We use Pade approximants to systematically approximate scalar unparticle propagators and their associated phase factors by a finite number of ordinary particles. This is possible for conformal dimensions 1<d<2, and also for d>2 if we add local terms. A small number of particles can, in some cases, mimic unparticle signals. We also discuss how the approximants capture basic unparticle properties.
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Quantum Critical Higgs: From AdS$_5$ to Colliders
In QCH models the large enhancement expected in gg to ZZ cancels once the correct i epsilon branch is used, while gg to HZ develops an order-of-magnitude excess at high invariant mass.