Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 tev with the atlas detector measurements of Higgs boson production and ... G. AAD et al.
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© 2015 CERN, for the ATLAS Collaboration. The final ATLAS Run 1 measurements of Higgs boson production and couplings in the decay channel H→ZZ∗→ ′+ ′-, where ′=e or μ, are presented. These measurements were performed using pp collision data corresponding to integrated luminosities of 4.5 and 20.3fb-1 at center-of-mass energies of 7 and 8 TeV, respectively, recorded with the ATLAS detector at the LHC. The H→ZZ∗→4 signal is observed with a significance of 8.1 standard deviations, with an expectation of 6.2 standard deviations, at mH=125.36GeV, the combined ATLAS measurement of the Higgs boson mass from the H→γγ and H→ZZ∗→4 channels. The production rate relative to the Standard Model expectation, the signal strength, is measured in four different production categories in the H→ZZ∗→4 channel. The measured signal strength, at this mass, and with all categories combined, is 1.44-0.33+0.40. The signal strength for Higgs boson production in gluon fusion or in association with tt¯ or bb¯ pairs is found to be 1.7-0.4+0.5, while the signal strength for vector-boson fusion combined with WH/ZH associated production is found to be 0.3-0.9+1.6.
AuthorsAad, G; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdinov, O; Aben, R; Abi, B; Abolins, M; Abouzeid, OS; Abramowicz, H; Abreu, H; Abreu, R; Abulaiti, Y; Abulaiti, Y; Acharya, BS; Acharya, BS; Adamczyk, L; Adams, DL; Adelman, J; Adomeit, S; Adye, T; Agatonovic-Jovin, T; Aguilar-Saavedra, JA; Aguilar-Saavedra, JA; Agustoni, M; Ahlen, SP; Ahmadov, F; Aielli, G; Aielli, G; Akerstedt, H; Akerstedt, H; Åkesson, TPA; Akimoto, G; Akimov, AV; Alberghi, GL; Alberghi, GL; Albert, J; Albrand, S; Alconada Verzini, MJ; Aleksa, M; Aleksandrov, IN; Alexa, C; Alexander, G; Alexandre, G; Alexopoulos, T; Alhroob, M; Alhroob, M; Alimonti, G; Alio, L; Alison, J; Allbrooke, BMM; Allison, LJ; Allport, PP; Aloisio, A; Aloisio, A; Alonso, A; Alonso, F; Alpigiani, C; Altheimer, A; Alvarez Gonzalez, B; Alviggi, MG; Alviggi, MG; Amako, K; Amaral Coutinho, Y; Amelung, C; Amidei, D; Amor Dos Santos, SP; Amor Dos Santos, SP; Amorim, A; Amorim, A; Amoroso, S; Amram, N; Amundsen, G; Anastopoulos, C; Ancu, LS; Andari, N; Andeen, T; Anders, CF; Anders, G; Anderson, KJ; Andreazza, A; Andreazza, A; Andrei, V; Anduaga, XS; Angelidakis, S; Angelozzi, I; Anger, P; Angerami, A; Anghinolfi, F; Anisenkov, AV; Anjos, N; Annovi, A; Antonaki, A; Antonelli, M; Antonov, A; Antos, J; Anulli, F; Aoki, M; Aperio Bella, L; Apolle, R
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