TY  - SER
AU  - Aad,G.
AU  - Abdallah,J.
AU  - Chelkov,G.A.
AU  - Abbott,B.
ED  - Томский государственный университет
TI  - Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
KW  - ATLAS, детектор
KW  - Большой адронный коллайдер
KW  - Хиггса бозон
KW  - столкновение частиц
KW  - лептоны
KW  - кварки
KW  - статьи в журналах
N1  - Библиогр.: 97 назв
N2  - A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb−1 of proton-proton collision data recorded by the ATLAS experiment at s√=8 TeV at the Large Hadron Collider. Five final states, targeting the decays H→WW∗, ττ, and ZZ∗, are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or μ) without a hadronically decaying τ lepton; three light leptons; two same-charge light leptons with a hadronically decaying τ lepton; four light leptons; and one light lepton and two hadronically decaying τ leptons. No significant excess of events is observed above the background expectation. The best fit for the tt¯H production cross section, assuming a Higgs boson mass of 125 GeV, is 2.1+1.4−1.2 times the SM expectation, and the observed (expected) upper limit at the 95% confidence level is 4.7 (2.4) times the SM rate. The p-value for compatibility with the background-only hypothesis is 1.8σ; the expectation in the presence of a Standard Model signal is 0.9σ
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000533911
ER  -