First Observation of the Rare Purely Baryonic Decay &ITB&IT<SUP>0</SUP> → &ITp&IT$(&ITp&IT)over-bar-$

Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Ali, S
et al (show 794 more authors) (2017) First Observation of the Rare Purely Baryonic Decay &ITB&IT<SUP>0</SUP> → &ITp&IT$(&ITp&IT)over-bar-$. PHYSICAL REVIEW LETTERS, 119 (23). 232001-.

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The first observation of the decay of a B^{0} meson to a purely baryonic final state, B^{0}→pp[over ¯], 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(B^{0}→pp[over ¯])=(1.25±0.27±0.18)×10^{-8}, where the first uncertainty is statistical and the second systematic. The decay mode B^{0}→pp[over ¯] is the rarest decay of the B^{0} meson observed to date. The decay B_{s}^{0}→pp[over ¯] is also investigated. No signal is seen and the upper limit B(B_{s}^{0}→pp[over ¯])<1.5×10^{-8} at 90% confidence level is set on the branching fraction.

Item Type: Article
Additional Information: 'All figures and tables, along with any supplementary material and additional information, are available at
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 12 Jan 2018 12:26
Last Modified: 06 Oct 2023 01:57
DOI: 10.1103/PhysRevLett.119.232001
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