Speaker
Description
Heavy Z' gauge bosons are predicted to exist by a number of promising theories of physics beyond the Standard Model, including GUTs. Many Z' models predict decay into a pair of oppositely charged electrons or muons. These decay channels offer clear, low-background signatures with fully reconstructed final states - ideal for discovery by a general purpose collider experiment like ATLAS. A summary of the search for dilepton resonances over a Standard Model background, based on a partial ATLAS Run 3 dataset, is presented. The analysis, currently at an advanced stage, aims to improve on the mass and cross-section exclusion limits, set by ATLAS and CMS in Run 2, on a number of Z' models as well as on Randall-Sundrum gravitons, to which the search is also sensitive.