Z' search in non-minimal Universal Extra Dimensions: two-bumps and interference

par Dr Kenji Nishiwaki (Harish-Chandra Research Insitute, India)

mardi 9 sept. 2014, 14:00 → 15:00 Europe/Paris

Salle des sommets (LAPTh)

We discuss prospects of the Z' search at the LHC in non-minimal Universal Extra Dimensions with tree-level brane-local terms in five dimensions. In this scenario, we can find the two major differences from an ordinary Z' physics: (i) two Z' candidates exist close to one another; (ii) the effective couplings to the SM fermions could be very large due to drastic overlapping of their profiles along the extra dimension. To evaluate the actual situation precisely, we reconsider the important issues of resonant processes, i.e., treatment of resonant propagators and including interference effects, where they tell us interesting aspects even in a usual case with one Z' gauge boson. We also focus on observables measuring the asymmetry of the final state particles, which could be helpful when we try to discriminate the possibility that the invariant mass distribution of two Z' candidates looks like that of single Z' boson. This talk is based on the ongoing project with Aseshkrishna Datta (HRI) and Saurabh Niyogi (HRI).