2014/11/30 by V. M. Abazov, D0 Collaboration, B. Abbott +98 · 1 citation
Physics and Astronomy · #Asymmetry #B meson #Bar (unit) #Collider #High-Energy Particle Collisions Research #Large Hadron Collider #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Quantum Chromodynamics and Particle Interactions #Tevatron #hep-ex
paper · pdf · doi:10.1103/physrevlett.114.051803
published as Phys. Rev. Lett. 114, 051803 (2015) · 8 pages, 3 figures
openalex publication_date 2015/02/04 · arxiv created 2015/02/05 · arxiv updated 2015/03/04 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a measurement of the forward-backward asymmetry in the production of B^\ifmmode±\else\textpm\fi mesons, AFB(B^\ifmmode±\else\textpm\fi), using B^\ifmmode±\else\textpm\fi\ensuremath→J/\ensuremathψK^\ifmmode±\else\textpm\fi decays in 10.4 fb^\ensuremath-1 of pp collisions at √(s)=1.96 TeV collected by the D0 experiment during Run II of the Tevatron collider. A nonzero asymmetry would indicate a preference for a particular flavor, i.e., b quark or b antiquark, to be produced in the direction of the proton beam. We extract AFB(B^\ifmmode±\else\textpm\fi) from a maximum likelihood fit to the difference between the numbers of forward- and backward-produced B^\ifmmode±\else\textpm\fi mesons. We measure an asymmetry consistent with zero: AFB(B^\ifmmode±\else\textpm\fi)=\phantom\rule0ex0ex[\ensuremath-0.24\ifmmode±\else\textpm\fi0.41 (stat)\ifmmode±\else\textpm\fi0.19 (syst)]%.