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First measurement of the CP-violating phase [phi] dd [bar] s in B0s(K+)(K+) decays  (  Zeitschriftenartikel  ) 
A flavour-tagged decay-time-dependent amplitude analysis of B s 0 (K+)(K+) decays is presented in the K± mass range from 750 to 1600MeV/c2. The analysis uses pp collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb1. Several quasi-two-body decay modes are considered, corresponding to K± combinations with spin 0, 1 and 2, which are dominated by the K 0 * (800)0 and K 0 * (1430)0, the K*(892)0 and the K 2 * (1430)0 resonances, respectively. The longitudinal polarisation fraction for the B0sK(892)K¯¯¯¯¯(892)0Bs0K(892)K¯(892)0 {B}_s^0\to {K}^{\ast }(892){}^{\circ}{\overline{K}}^{\ast }{(892)}^0 decay is measured as fL = 0.208 ± 0.032 ± 0.046, where the first uncertainty is statistical and the second is systematic. The first measurement of the mixing-induced CP-violating phase, dd¯¯¯ssdd¯ {\phi}_s^{d\overline{d}} , in bdd¯¯¯sbdd¯s b\to d\overline{d}s transitions is performed, yielding a value of dd¯¯¯s=0.10±0.13(stat)±0.14sdd¯=0.10±0.13(stat)±0.14 {\phi}_s^{d\overline{d}}=-0.10\pm 0.13\left(\mathrm{stat}\right)\pm 0.14 (syst) rad. Open image in new window
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