TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2017
DA  - 2017//
TI  - First Observation of the Rare Purely Baryonic Decay B0 -> p p-bar
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 232001 - 10pp
VL  - 119
IS  - 23
PB  - Amer Physical Soc
AB  - The first observation of the decay of a B0 meson to a purely baryonic final state, B-0 -> p$(p)over-bar-$ , 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 -> p$(p)over-bar-$) = (1.25 +/- 0.27 +/- 0.18) x 10(-8), where the first uncertainty is statistical and the second systematic. The decay mode B-0 -> p$(p)over-bar-$ is the rarest decay of the B-0 meson observed to date. The decay B-s(0 )-> p$(p)over-bar-$ is also investigated. No signal is seen and the upper limit B(B-s(0) -> p$(p)over-bar-$) < 1.5 x 10(-8) at 90% confidence level is set on the branching fraction.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1709.01156
UR  - https://doi.org/10.1103/PhysRevLett.119.232001
DO  - 10.1103/PhysRevLett.119.232001
LA  - English
N1  - WOS:000416947500004
ID  - LHCbCollaborationAaij_etal2017
ER  -