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Search for high mass dilepton resonances in pp collisions at √s=7 TeV with the ATLAS experiment

CollaborationWith : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Bell, Paul / Bell, William / Berglund, Frida Elina / Blondel, Alain / Bucci, Francesca / Clark, Allan Geoffrey / Dao, Valerio / Ferrere, Didier / Gadomski, Szymon / Garcia Navarro, Jose Enrique / Gaumer, Olivier / Gonzalez Sevilla, Sergio / Goulette, Marc / Hamilton, Andrew / Leger, Annie / Lister, Alison / Macina-Buono, Daniela / Martin Dit Latour, Bertrand / Mikulec, Bettina / Moneta, Lorenzo / Mora Herrera, Maria Clemencia Rosario / Morone, Maria Cristina / Nektarijevic, Snezana / Orellana, Frédérik / Pasztor, Arpad / Pohl, Martin / Robichaud-Veronneau, Andrée / Rosselet, Laurent / Wu, Xin
Published in Physics letters. B. 2011, vol. 700, no. 3-4, p. 163-180
Abstract This Letter presents a search for high mass e+e− or μ+μ−resonances in pp collisions at √s=7 TeV at the LHC. The data were recorded by the ATLAS experiment during 2010 and correspond to a total integrated luminosity of ∼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 E6-motivated Z′ models.
Keywords Grand unified theoryNarrow resonanceNew gauge bosonZ′DileptonMass spectrum
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ATLAS COLLABORATION. Search for high mass dilepton resonances in pp collisions at √s=7 TeV with the ATLAS experiment. In: Physics letters. B, 2011, vol. 700, n° 3-4, p. 163-180. doi: 10.1016/j.physletb.2011.04.044 https://archive-ouverte.unige.ch/unige:41119

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Deposited on : 2014-10-24

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