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

This Letter reports on a search for narrow high-mass resonances decaying into dilepton final states. The data were recorded by the ATLAS experiment in pp collisions at √s=7  TeV at the Large Hadron Collider and correspond to a total integrated luminosity of 1.08 (1.21)  fb(-1) in the e(+)e(-) (μ(+)μ...

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Veröffentlicht in:Physical review letters 2011-12, Vol.107 (27), p.272002-272002
Hauptverfasser: Aad, G, Abbott, B, Abdallah, J, Abdelalim, A A, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Acharya, B S, Adams, D L, Addy, T N, Adelman, J, Aderholz, M, Adomeit, S, Adragna, P, Adye, T, Aefsky, S, Aguilar-Saavedra, J A, Aharrouche, M, Ahlen, S P, Ahles, F, Ahmad, A, Ahsan, M, Aielli, G, Akdogan, T, Akesson, T P A, Akimoto, G, Akimov, A V, Akiyama, A, Alam, M S, Alam, M A, Albert, J, Albrand, S, Aleksa, M, Aleksandrov, I N, Alessandria, F, Alexa, C, Alexander, G, Alexandre, G, Alexopoulos, T, Alhroob, M, Aliev, M, Alimonti, G, Alison, J, Aliyev, M, Allport, P P, Allwood-Spiers, S E, Almond, J, Aloisio, A, Alon, R, Alonso, A, Alviggi, M G, Amako, K, Amaral, P, Amelung, C, Ammosov, V V, Amorim, A, Amorós, G, Amram, N, Anastopoulos, C, Ancu, L S, Andari, N, Andeen, T, Anders, C F, Anders, G, Anderson, K J, Andreazza, A, Andrei, V, Andrieux, M-L, Anduaga, X S, Angerami, A, Anghinolfi, F, Anjos, N, Annovi, A, Antonaki, A, Antonelli, M, Antonov, A, Antos, J, Anulli, F, Aoun, S, Aperio Bella, L, Apolle, R, Arabidze, G, Aracena, I, Arai, Y, Arce, A T H, Archambault, J P, Arfaoui, S, Arguin, J-F, Arik, E, Arik, M, Armbruster, A J, Arnaez, O, Arnault, C, Artamonov, A, Artoni, G, Arutinov, D
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Zusammenfassung:This Letter reports on a search for narrow high-mass resonances decaying into dilepton final states. The data were recorded by the ATLAS experiment in pp collisions at √s=7  TeV at the Large Hadron Collider and correspond to a total integrated luminosity of 1.08 (1.21)  fb(-1) in the e(+)e(-) (μ(+)μ(-)) channel. No statistically significant excess above the standard model expectation is observed and upper limits are set at the 95% C.L. on the cross section times branching fraction of Z' resonances and Randall-Sundrum gravitons decaying into dileptons as a function of the resonance mass. A lower mass limit of 1.83 TeV on the sequential standard model Z' boson is set. A Randall-Sundrum graviton with coupling k/M(Pl)=0.1 is excluded at 95% C.L. for masses below 1.63 TeV.
ISSN:0031-9007
1079-7114
1079-7114
DOI:10.1103/PhysRevLett.107.272002