2013/10/31 by LHCb collaboration, R. Aaij, B. Adeva +674 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Luminosity #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex
paper · pdf · doi:10.1103/physrevlett.112.091802
published as Phys. Rev. Lett, 112 (2014) 091802 · 10 pages 3 figures, v2 after PRL review
arxiv created 2014/01/16 · openalex publication_date 2014/03/04 · arxiv updated 2016/03/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Decays of Bs0 and B0 mesons into J/\ensuremathψ \ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathπ+\ensuremathπ^\ensuremath- final states, produced in pp collisions at the LHC, are investigated using data corresponding to an integrated luminosity of 3 fb^\ensuremath-1 collected with the LHCb detector. B(s)0\ensuremath→J/\ensuremathψf1(1285) decays are seen for the first time, and the branching fractions are measured. Using these rates, the f1(1285) mixing angle between strange and nonstrange components of its wave function in the qq structure model is determined to be \ifmmode±\else\textpm\fi(24.0_\ensuremath-2.6\ensuremath-0.8+3.1+0.6)\ifmmode^∘\else\textdegree\fi. Implications on the possible tetraquark nature of the f1(1285) are discussed.