[en] The paper presents several recent ATLAS results on the analyses of B-meson decays into charmonium states. These include the measurements of B+ mass and the fractions of J/ψ mesons produced in b-hadron decays in pp collisions at = 13 TeV in the center of mass system. The measured partial widths and polarizations in B+ c → J/ψD(*)+ s decays and CP-violation parameters in B0 s → J/ψϕ decays in pp collisions at 7 and 8 TeV in the center of mass system are also presented.
Journal
Physics of Particles and Nuclei; ISSN 1063-7796; 
; v. 48(6); p. 854-856
; v. 48(6); p. 854-856
[en] A measurement of CP-violating weak phase φs and meson decay width difference with decays in the ATLAS experiment is presented. It is based on integrated luminosity of 14.3 fb−1 collected by the ATLAS detector from 8 TeV pp collisions at the LHC. The measured values are statistically combined with those from 4.9 fb−1 of 7 TeV collisions data, yielding an overall Run-1 ATLAS result. (paper)
Journal
Journal of Physics. Conference Series (Online); ISSN 1742-6596; ; v. 798(1); [4 p.]
; v. 798(1); [4 p.]
[en] Performance of the Transition Radiation Tracker (TRT) at the ATLAS experiment with argon and krypton gas mixtures was simulated. The efficiency of transition radiation registration, which is necessary for electron identification, was estimated along with the electron identification capabilities under such conditions
Journal