2014/02/25 by LHCb collaboration, R. Aaij, B. Adeva +687 · 1 citation
Chemistry · Physics and Astronomy · #Algorithm #Chemistry #Computer science #Crystallography #High-Energy Particle Collisions Research #Luminosity #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #State (computer science) #hep-ex
paper · pdf · doi:10.1103/physrevd.89.092006
published as Phys. Rev. D 89, 092006 (2014) · 31 pages, 20 figures
arxiv created 2014/02/25 · openalex publication_date 2014/05/14 · arxiv updated 2016/03/26 · openalex created_date 2017/07/14 · openalex updated_date 2026/08/05
Structure of the decay Bs0\ensuremath→J/\ensuremathψ\ensuremathπ+\ensuremathπ^\ensuremath- is studied using data corresponding to 3 fb^\ensuremath-1 of integrated luminosity from pp collisions produced by the LHC and collected by the LHCb detector. Five interfering \ensuremathπ+\ensuremathπ^\ensuremath- states are required to describe the decay: f0(980),f0(1500),f0(1790),f2(1270), and f2^\ensuremath'(1525). An alternative model including these states and a nonresonant J/\ensuremathψ\ensuremathπ+\ensuremathπ^\ensuremath- component also provides a good description of the data. Based on the different transversity components measured for the spin-2 intermediate states, the final state is found to be compatible with being entirely CP odd. The CP-even part is found to be <2.3% at a 95% confidence level. The f0(500) state is not observed, allowing a limit to be set on the absolute value of the mixing angle with the f0(980) of <7.7^\ifmmode^∘\else\textdegree\fi at a 90% confidence level, consistent with a tetraquark interpretation of the f0(980) substructure.