First observation of B^0_s -> J/psi f0(980) decays

R. Aaij , C. Adrover (1) , F. Alesio (1) , E. Aslanides (1) , J. Cogan (1) , B. Khanji (1) , R. Le Gac (1) , O. Leroy (1) , G. Mancinelli (1) , E. Maurice (1) , M. Sapunov (1) , J. Serrano (1) , A. Tsaregorodtsev (1) , E. Ben-Haim (2) , M. Benayoun (2) , W. da Silva (2) , P. David (2) , L. del Buono (2) , F. Kapusta (2) , I. de Bonis (3) , D. Decamp (3) , Ph. Ghez (3) , P. Hopchev (3) , J.-P. Lees (3) , I.V. Machikhiliyan (3) , M.-N. Minard (3) , B. Pietrzyk (3) , S. t'Jampens (3) , V. Tisserand (3) , S. Barsuk (4) , O. Callot (4) , B. d'Almagne (4) , J. He (4) , V. Iakovenko (4) , B. Jean-Marie (4) , J. Lefrançois (4) , F. Machefert (4) , A. Martens (4) , A. Martin Sanchez (4) , M. Nicol (4) , P. Robbe (4) , M.-H. Schune (4) , B. Viaud (4) , I. Videau (4)

1 CPPM - Centre de Physique des Particules de Marseille
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 LAPP - Laboratoire d'Annecy de Physique des Particules
4 LAL - Laboratoire de l'Accélérateur Linéaire

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay Bs -> J/psi f0(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the B_s system. Using a fit to the

Mots clés: LHC; Hadronic B decays; B0s meson

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique des Hautes Energies - Phénoménologie [hep-ph]

R. Aaij, C. Adrover, F. Alesio, E. Aslanides, J. Cogan, et al.. First observation of B^0_s -> J/psi f0(980) decays. Physics Letters B, 2011, 698, pp.115-122. ⟨10.1016/j.physletb.2011.03.006⟩. ⟨in2p3-00563723⟩