%0 Generic
%A Fontana, Marianna
%D 2015
%F heidok:18105
%R 10.11588/heidok.00018105
%T Search for the B_{d,s}^0 -> K^{*0} K_{S}^0 decays at LHCb
%U https://archiv.ub.uni-heidelberg.de/volltextserver/18105/
%X The search for the previously unobserved \BdstoKstarKs decays is performed at the LHCb experiment, using proton-proton collisions at a centre of mass energy of $\sqrt{s}=7$ TeV. These decays provide a fertile ground in the search of New Physics in \CP violation measurements. The data sample was recorded in 2011 and corresponds to  an integrated luminosity of 1 fb^{-1}. The first observation of the  B_{s}^0 -> K^{*0} K_{S}^0 decay is reported. A measurement of the limit and the branching  fraction relative to the  B_{d}^0 -> K^{*0} K_{S}^0 decay yields the following results:    BF(B_{d}^0 -> K^{*0} K_{S}^0)/BF(B_{d,s}^0 -> K_{S}^0 \pi^+ \pi^-) < 0.12 (0.15)  at 90\% (95\%) CL     BF(B_{s}^0 -> K^{*0} K_{S}^0)/BF(B_{d,s}^0 -> K_{S}^0 \pi^+ \pi^-) =  0.22 \pm 0.06(stat) \pm 0.02(syst) \pm 0.01(f_s/f_d),    where the first uncertainty is statistical, the second systematic and the third comes from the uncertainty on   the hadronisation fraction.