The first observation of the decay of a B0 meson to a purely baryonic final state, B0âpp, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0 fb-1. The branching fraction is determined to be B(B0âpp)=(1.25±0.27±0.18)Ã10-8, where the first uncertainty is statistical and the second systematic. The decay mode B0âpp is the rarest decay of the B0 meson observed to date. The decay Bs0âpp is also investigated. No signal is seen and the upper limit B(Bs0âpp)<1.5Ã10-8 at 90% confidence level is set on the branching fraction.
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Titolo: | First Observation of the Rare Purely Baryonic Decay B0 âp p- | |
Autori: | ||
Data di pubblicazione: | 2017 | |
Rivista: | ||
Handle: | http://hdl.handle.net/11567/888768 | |
Appare nelle tipologie: | 01.01 - Articolo su rivista |