TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2019
DA  - 2019//
TI  - Amplitude analysis of the B0 (s)! K0K0 decays and measurement of the branching fraction of the B0! K0K0 decay
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 032
EP  - 31pp
VL  - 07
IS  - 7
PB  - Springer
KW  - B physics
KW  - Hadron-Hadron scattering (experiments)
AB  - 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).
SN  - 1029-8479
UR  - https://arxiv.org/abs/1905.06662
UR  - https://doi.org/10.1007/JHEP07(2019)032
DO  - 10.1007/JHEP07(2019)032
LA  - English
N1  - WOS:000475572300001
ID  - LHCbCollaborationAaij_etal2019
ER  -