# First Observation of the Rare Purely Baryonic Decay $B^0\to p\bar p$

Abstract : 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 Bs0→pp¯ is also investigated. No signal is seen and the upper limit B(Bs0→pp¯)<1.5×10-8 at 90% confidence level is set on the branching fraction.
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Phys.Rev.Lett., 2017, 119 (23), pp.232001. 〈10.1103/PhysRevLett.119.232001〉

https://hal.archives-ouvertes.fr/hal-01669721
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Soumis le : jeudi 21 décembre 2017 - 00:14:01
Dernière modification le : lundi 16 avril 2018 - 21:23:26

### Citation

R. Aaij, Bernardo Adeva, Marco Adinolfi, Ziad Ajaltouni, Simon Akar, et al.. First Observation of the Rare Purely Baryonic Decay $B^0\to p\bar p$. Phys.Rev.Lett., 2017, 119 (23), pp.232001. 〈10.1103/PhysRevLett.119.232001〉. 〈hal-01669721〉

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