@Article{LHCbCollaborationAaij_etal2014,
author="LHCb Collaboration (Aaij, R. et al
and Martinez-Vidal, F.
and Oyanguren, A.
and Ruiz Valls, P.
and Sanchez Mayordomo, C.",
title="First observations of the rare decays B (+) -> K (+)pi (+)pi (-)mu(+)mu (-) and B (+)-> phi K (+)mu(+)mu (-)",
journal="Journal of High Energy Physics",
year="2014",
publisher="Springer",
volume="10",
number="10",
pages="064--18pp",
optkeywords="Rare decay; Hadron-Hadron Scattering; B physics; Flavor physics",
abstract="First observations of the rare decays B (+) -> K (+)pi (+) pi (-) $\mu$(+) $\mu$(-) 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 (-) $\mu$(+) $\mu$(-) ) = (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 (-) $\mu$(+) $\mu$(-)",
optnote="WOS:000343801600001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1986), last updated on Thu, 27 Nov 2014 15:44:00 +0000",
issn="1029-8479",
doi="10.1007/JHEP10(2014)064",
opturl="http://arxiv.org/abs/arXiv:1408.1137",
opturl="https://doi.org/10.1007/JHEP10(2014)064",
archivePrefix="arXiv",
eprint="arXiv:1408.1137",
language="English"
}