Searching for Narrow Graviton Resonances with the ATLAS Detector at the Large Hadron Collid.pdfVIP

Preprint typeset in JHEP style. - HYPER VERSION Cavendish-HEP-00/07 DAMTP-2000-55 CERN-TH/2000-158 RAL-TR-2000-025 hep-ph/0006114 Searching for Narrow Graviton Resonances 0 with the ATLAS Detector at the Large 0 0 2 Hadron Collider g u A 7 ∗ † ‡ ‡,$ 1 B.C. Allanach , K. Odagiri , M.A. Parker and B.R. Webber ∗ DAMTP, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, 2 v UK 4 † Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK 1 1 ‡ Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, 6 CB3 0HE, UK 0 0 $ Theory Division, CERN, 1211 Geneva 23, Switzerland 0 / h p - Abstract: A spectrum of massive graviton states is present in several recent p e theoretical models that include extra space dimensions. In some such models the h graviton states are well separated in mass, and can be detected as resonances in : v i collider experiments. The ability of the ATLAS detector at the Large Hadron X Collider to identify such states and measure their properties is considered, in the r a case that the resonances are narrow compared to the experimental resolution. The discovery limits for the detection of the decay mode G → e+e− are derived. The angular distribution of the lepton pair is used to determine the spin of the interme- diate state. In one specific model, the resonance can be detected