%0 Journal Article
%T First observations of the rare decays B (+) -> K (+)pi (+)pi (-)mu(+)mu (-) and B (+)-> phi K (+)mu(+)mu (-)
%A LHCb Collaboration (Aaij, R. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Ruiz Valls, P.
%A Sanchez Mayordomo, C.
%J Journal of High Energy Physics
%D 2014
%V 10
%N 10
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2014
%O WOS:000343801600001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1986), last updated on Thu, 27 Nov 2014 15:44:00 +0000
%X First observations of the rare decays B (+) -> K (+)pi (+) pi (-) μ(+) μ(-) and B (+)-> phi K+ mu(+)mu(-) are presented using data corresponding to an integrated luminosity of 3.0 fb(-1), collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The branching fractions of the decays are B(B (+) -> K (+)pi (+) pi (-) μ(+) μ(-) ) = (4.36 (-0.27) (+0.29) (stat) +/- 0.21 (syst) +/- (norm)) x 10(-7), B(B (+)-> phi K+ mu(+)mu(-)) = (0.82 (+0.19)(-0.17) (stat) (+0.10)(-0.04) (syst) +/- 0.27 (norm)) x 10(-7) where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. A measurement of the differential branching fraction in bins of the invariant mass squared of the dimuon system is also presented for the decay B (+) -> K (+)pi (+) pi (-) μ(+) μ(-)
%K Rare decay
%K Hadron-Hadron Scattering
%K B physics
%K Flavor physics
%R 10.1007/JHEP10(2014)064
%U http://arxiv.org/abs/arXiv:1408.1137
%U https://doi.org/10.1007/JHEP10(2014)064
%P 064-18pp