Updated search for B-c(+) decays to two charm mesons

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doi:10.1007/JHEP12(2021)117

A data set corresponding to an integrated luminosity of 9 fb(-1) of proton-proton collisions collected by the LHCb experiment has been analysed to search for D-(s)(()*())+ ((D) over bar)(*)0 decays. The decays are fully or partially reconstructed, where one or two (8) missing neutral pions or photons from the decay of an excited charm meson are allowed. Upper limits for the branching fractions, normalised to B+ decays to final states with similar topologies, are obtained for sixteen B-c(+) decay modes. For the decay B-c(+) -> D-s(+)(D) over bar (0), an excess with a significance of 3.4 standard deviations is found.

Aaij, R., Abdelmotteleb, A., Beteta, C.a., Ackernley, T., Adeva, B., Adinolfi, M., et al. (2021). Updated search for B-c(+) decays to two charm mesons. JOURNAL OF HIGH ENERGY PHYSICS(12) [10.1007/JHEP12(2021)117].