ATLAS collaboration (2855 authors)Aguilar-Saavedra, Juan AntonioAmor Dos Santos, Susana PatriciaAnjos, NunoAraque, Juan PedroCantrill, RobertCarvalho, JoãoCastro, Nuno FilipeConde Muiño, PatriciaDa Cunha Sargedas De Sousa, Mario JoseFiolhais, MiguelGalhardo, BrunoGomes, AgostinhoGonçalo, RicardoJorge, PedroLopes, LourencoMachado Miguens, JoanaMaio, AméliaManeira, JoséOleiro Seabra, Luis FilipeOnofre, AntónioPalma, AlbertoPedro, RuteSantos, HelenaSaraiva, JoãoSilva, JoséTavares Delgado, AdemarVeloso, FilipeWolters, Helmut2019-02-042019-02-042016-12-05http://dx.doi.org/10.1140/epjc/s10052-016-4521-yhttp://hdl.handle.net/10400.26/27152The dijet production cross section for jets containing a b-hadron (b-jets) has been measured in proton–proton collisions with a centre-of-mass energy of $\sqrt{s} = 7$  TeV, using the ATLAS detector at the LHC. The data used correspond to an integrated luminosity of $\mathrm 4.2\,\text {fb}^{-1}$ . The cross section is measured for events with two identified b-jets with a transverse momentum $p_{\text {T}} > 20$  GeV and a minimum separation in the $\eta $ – $\phi $ plane of $\Delta R = 0.4$ . At least one of the jets in the event is required to have $p_{\text {T}} > 270$  GeV. The cross section is measured differentially as a function of dijet invariant mass, dijet transverse momentum, boost of the dijet system, and the rapidity difference, azimuthal angle and angular distance between the b-jets. The results are compared to different predictions of leading order and next-to-leading order perturbative quantum chromodynamics matrix elements supplemented with models for parton-showers and hadronization.engjournal article2019-02-04