Can I read Z' at the LHC: Interference and Finite Width Effects in Drell-Yan on EtoBox?

Z' at the LHC: Interference and Finite Width Effects in Drell-Yan by Accomando, Elena; Becciolini, Diego; Belyaev, Alexander; Moretti, Stefano; Shepherd-Themistocleous, Claire is a scholarly article available to read on EtoBox.

What is Z' at the LHC: Interference and Finite Width Effects in Drell-Yan about?

The interference effects between an extra neutral spin-1 Z'-boson and the Standard Model background in the Drell-Yan channel at the LHC are studied in detail. The final state with two oppositely charged leptons is considered. The interference contribution to the new physics signal, currently not fully taken into account by experimental collaborations in Z'-searches and in the interpretation of the results, can be substantial. It may affect limits or discovery prospects of Z' at the LHC. As the Z'-boson interference is model-dependent, a proper treatment would a priori require a dedicated experimental analysis for each particular model. Doing so could potentially improve the sensitivity to new physics, but would require significantly more experimental effort. At the same time, it is shown that one can define an invariant mass window, valid for a wide range of models, for which the contribution of the model-dependent interference to the Beyond the Standard Model signal is reduced to O(10%), comparable to the level of the combined uncertainty from parton densities and higher order corrections. This quasi-model-independent "magic cut" does not scale with the mass of the Z'-boson and is

Author

Accomando, Elena; Becciolini, Diego; Belyaev, Alexander; Moretti, Stefano; Shepherd-Themistocleous, Claire

Published

2013

Language

EN