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Regular version of the site

Article

Observation of the semileptonic decay B+→pp¯μ+νμ

Journal of High Energy Physics. 2020. Vol. 03. P. 146.

The Cabibbo-suppressed semileptonic decay B+→pp⎯⎯⎯μ+νμ is observed for the first time using a sample of pp collisions corresponding to an integrated luminosity of 1.0, 2.0 and 1.7fb−1 at centre-of-mass energies of 7, 8 and 13TeV, respectively. The differential branching fraction is measured as a function of the pp⎯⎯⎯ invariant mass using the decay mode B+→J/ψK+ for normalisation. The total branching fraction is measured to be

(B+→pp⎯⎯⎯μ+νμ)=(5.27+0.23−0.24±0.21±0.15)×10−6,

where the first uncertainty is statistical, the second systematic and the third is from the uncertainty on the branching fraction of the normalisation channel.