10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\pi -\pi +\pi - final states, produced in pp collisions at the LHC, are investigated using data corresponding to an integrated luminosity of 3/fb collected with the LHCb detector. B^0_(s) -> J\psi f_1(1285) decays are seen for the first time, and the branching fractions are measured. Using these rates, the f_1(1285) mixing angle between strange and non-strange components of its wave function in the q-qbar structure model is determined to be \pm (24.0^{+3.1+0.6}_{-2.6-0.8}) degrees. Implications on the possible tetraquark nature of the f_1(1285) are discussed
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
10 pages 3 figures. See paper for full list of authorsDecays of Bs and B0 mesons into J/\psi \pi +\p...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...