Publication at Faculty of Mathematics and Physics |
2011
Abstract
This Letter presents a search for high mass e(+)e(-) or mu(+)mu(-) resonances in pp collisions at root s = 7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of similar to 40 pb(-1).
No statistically significant excess above the Standard Model expectation is observed in the search region of dilepton invariant mass above 110 GeV. Upper limits at the 95% confidence level are set on the cross section times branching ratio of Z'' resonances decaying to dielectrons and dimuons as a function of the resonance mass.
A lower mass limit of 1.048 TeV on the Sequential Standard Model Z'' boson is derived, as well as mass limits on Z* and E(6)-motivated Z'' models.