TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jaimes Elles, S. J.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Rebollo De Miguel, M.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanderswood, I.
PY  - 2023
DA  - 2023//
TI  - Observation of the B0s → D*+ D*- decay
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 119
EP  - 19pp
VL  - 07
IS  - 7
PB  - Springer
KW  - Branching fraction
KW  - Hadron-Hadron Scattering
AB  - The first observation of the B-s(0) -> D*+ D*- decay and the measurement of its branching ratio relative to the B-0 -> D*+ D*(-) decay are presented. The data sample used corresponds to an integrated luminosity of 9 fb(-1) of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV between 2011 and 2018. The decay is observed with more than 10 standard deviations and the time-integrated ratio of branching fractions is determined to be [GRAPHICS] . where the first uncertainty is statistical, the second systematic and the third due to the uncertainty of the fragmentation fraction ratio f(s)/f(d). The B-s(0) -> D*(+) D*(-) branching fraction is calculated to be [GRAPHICS] . where the fourth uncertainty is due to the B-0 -> D*(+) D*(-) branching fraction. These results are calculated using the average B-s(0) meson lifetime in simulation. Correction factors are reported for scenarios where either a purely heavy or a purely light B-s(0) eigenstate is considered.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2210.14945
UR  - https://doi.org/10.1007/JHEP07(2023)119
DO  - 10.1007/JHEP07(2023)119
LA  - English
N1  - WOS:001061773900001
ID  - LHCbCollaborationAaij_etal2023
ER  -