Search for the Standard Model Higgs boson in the decay channel H→ZZ(*)→4ℓ with 4.8 fb-1 of pp collision data at √s=7 TeV with ATLAS

Journal Article

This Letter presents a search for the Standard Model Higgs boson in the decay channel H→ZZ(*)→ℓ+ℓ-ℓ'+ℓ'-, where ℓ, ℓ'=e or μ, using proton-proton collisions at √s=7 TeV recorded with the ATLAS detector and corresponding to an integrated luminosity of 4.8 fb-1. The four-lepton invariant mass distribution is compared with Standard Model background expectations to derive upper limits on the cross section of a Standard Model Higgs boson with a mass between 110 GeV and 600 GeV. The mass ranges 134-156 GeV, 182-233 GeV, 256-265 GeV and 268-415 GeV are excluded at the 95% confidence level. The largest upward deviations from the background-only hypothesis are observed for Higgs boson masses of 125 GeV, 244 GeV and 500 GeV with local significances of 2.1, 2.2 and 2.1 standard deviations, respectively. Once the look-elsewhere effect is considered, none of these excesses are significant. © 2012 CERN.

Full Text

Duke Authors

Cited Authors

  • Aad, G; Abbott, BK; Abdallah, JM; Abdel Khalek, S; Abdelalim, AA; Abdesselam, A; Abdinov, OB; Abi, BA; Abolins, MA; AbouZeid, OS; Abramowicz, H; Abreu, H; Acerbi, E; Acharya, BS; Adamczyk, L; Adams, DL; Addy, TN; Adelman, J; Aderholz, M; Adomeit, S; Adragna, P; Adye, TJ; Aefsky, S; Aguilar-Saavedra, JA; Aharrouche, M; Ahlen, SP; Ahles, F; Ahmad, A; Ahsan, MAH; Aielli, G; Akdoǧan, T; Åkesson, TPA; Akimoto, G; Akimov, AV; Akiyama, A; Alam, MS; Alam, MA; Albert, JB; Albrand, S; Aleksa, M; Aleksandrov, IN; Alessandria, F; Alexa, C; Alexander, G; Alexandre, G; Alexopoulos, TA; Alhroob, M; Aliev, MA; Alimonti, G; Alison, JM; Aliyev, MI; Allbrooke, BMM; Allport, PP; Allwood-Spiers, SE; Almond, JE; Aloisio, A; Alon, R; Alonso, A; Álvarez González, B; Alviggi, MG; Amako, K; Amaral, PB; Amelung, C; Ammosov, VV; Amorim, AEA; Amorós, G; Amram, N; Anastopoulos, C; Ancu, LS; Andari, N; Andeen, TR; Anders, CF; Anders, G; Anderson, KJ; Andreazza, A; Andrei, V; Andrieux, ML; Anduaga, XS; Angerami, A; Anghinolfi, F; Anisenkov, AV; Anjos, N; Annovi, A; Antonaki, A; Antonelli, M; Antonov, AA; Antoš, J; Anulli, F; Aoun, S; Aperio Bella, L; Apolle, R; Arabidze, G; Aracena, I; Arai, Y; Arce, ATH; Arfaoui, S; Arguin, JF; Arik, EB; Arik, M

Published Date

  • April 12, 2012

Published In

Volume / Issue

  • 710 / 3

Start / End Page

  • 383 - 402

International Standard Serial Number (ISSN)

  • 0370-2693

Digital Object Identifier (DOI)

  • 10.1016/j.physletb.2012.03.005

Citation Source

  • Scopus