First observation of Bs → J/ψf0(980) decays

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Dossett, D. ; Gershon, T. J. ; Harrison, P. F. ; Latham, Thomas ; Poluektov, Anton ; Whitehead, M. (Mark) ; Williams, M. P. ; HASH(0x55942f3524a0) (2011)
  • Publisher: Elsevier Science BV
  • Related identifiers: doi: 10.1016/j.physletb.2011.03.006
  • Subject: QC
    arxiv: Nuclear Theory | Nuclear Experiment | High Energy Physics::Experiment

Using data collected with the LHCb detector in proton–proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the system. Using a fit to the π+π− mass spectrum with interfering resonances gives . In the interval ±90 MeV around 980 MeV, corresponding to approximately two full f0 widths we also find , where in both cases the uncertainties are statistical and systematic, respectively.
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