@Article{LHCbCollaborationAaij_etal2019,
author="LHCb Collaboration (Aaij, R. et al
and Garcia Martin, L. M.
and Henry, L.
and Jashal, B. K.
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Vidal, J.
and Sanchez Mayordomo, C.",
title="Amplitude analysis of the B0 (s)! K0K0 decays and measurement of the branching fraction of the B0! K0K0 decay",
journal="Journal of High Energy Physics",
year="2019",
publisher="Springer",
volume="07",
number="7",
pages="032--31pp",
optkeywords="B physics; Hadron-Hadron scattering (experiments)",
abstract="The B0 K0K0 and B0 s K0K0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb. An untagged and timeintegrated amplitude analysis of B0 (s) (K+)(K) decays in two-body invariant mass regions of 150MeV/c2 around the K0 mass is performed. A stronger longitudinal polarisation fraction in the B0 K0K0 decay, fL = 0 : 724 0 : 051 (stat) 0 : 016 (syst), is observed as compared to fL = 0 : 240 0 : 031 (stat) 0 : 025 (syst) in the B0 s K0K0 decay. The ratio of branching fractions of the two decays is measured and used to determine B (B0 K0K0) = (8 : 0 0 : 9 (stat) 0 : 4 (syst)) x 10(-7).",
optnote="WOS:000475572300001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4093), last updated on Mon, 19 Aug 2019 07:30:05 +0000",
issn="1029-8479",
doi="10.1007/JHEP07(2019)032",
opturl="https://arxiv.org/abs/1905.06662",
opturl="https://doi.org/10.1007/JHEP07(2019)032",
language="English"
}