First Observation of the Rare Purely Baryonic Decay B⁰→pp¯
The first observation of the decay of a B⁰ meson to a purely baryonic final state, B⁰→pp, 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...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Published: |
American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/115944 https://orcid.org/0000-0002-3684-1560 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 |
| Summary: | The first observation of the decay of a B⁰ meson to a purely baryonic final state, B⁰→pp, 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(B⁰→pp)=(1.25±0.27±0.18)×10⁻⁸, where the first uncertainty is statistical and the second systematic. The decay mode B⁰→pp is the rarest decay of the B⁰ meson observed to date. The decay B[subscript s]⁰→pp is also investigated. No signal is seen and the upper limit B(B[subscript s]⁰→pp) < 1.5×10⁻⁸ at 90% confidence level is set on the branching fraction. |
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