- Main
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
- Aad, G;
- Abbott, B;
- Abdallah, J;
- Abdel Khalek, S;
- Abdelalim, AA;
- Abdesselam, A;
- Abdinov, O;
- Abi, B;
- Abolins, M;
- 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, T;
- Aefsky, S;
- Aguilar-Saavedra, JA;
- Aharrouche, M;
- Ahlen, SP;
- Ahles, F;
- Ahmad, A;
- Ahsan, M;
- Aielli, G;
- Akdogan, T;
- Åkesson, TPA;
- Akimoto, G;
- Akimov, AV;
- Akiyama, A;
- Alam, MS;
- Alam, MA;
- Albert, J;
- Albrand, S;
- Aleksa, M;
- Aleksandrov, IN;
- Alessandria, F;
- Alexa, C;
- Alexander, G;
- Alexandre, G;
- Alexopoulos, T;
- Alhroob, M;
- Aliev, M;
- Alimonti, G;
- Alison, J;
- Aliyev, M;
- Allbrooke, BMM;
- Allport, PP;
- Allwood-Spiers, SE;
- Almond, J;
- Aloisio, A;
- Alon, R;
- Alonso, A;
- Alvarez Gonzalez, B;
- Alviggi, MG;
- Amako, K;
- Amaral, P;
- Amelung, C;
- Ammosov, VV;
- Amorim, A;
- Amorós, G;
- Amram, N;
- Anastopoulos, C;
- Ancu, LS;
- Andari, N;
- Andeen, T;
- Anders, CF;
- Anders, G;
- Anderson, KJ;
- Andreazza, A;
- Andrei, V;
- Andrieux, ML;
- Anduaga, XS;
- Angerami, A;
- Anghinolfi, F;
- Anisenkov, A;
- 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, ATH;
- Arfaoui, S;
- Arguin, JF;
- Arik, E;
- Arik, M;
- Armbruster, AJ
- et al.
Abstract
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.
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