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

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

LHCb

Collaboration

Sep 4, 2017

10 pages

Published in:

Phys.Rev.Lett. 119 (2017) 23, 232001

Published: Dec 4, 2017

e-Print:

1709.01156 [hep-ex]

DOI:

10.1103/PhysRevLett.119.232001

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\mathit p}}{{\overline{\mathit p}}}

Report number:

LHCB-PAPER-2017-022,
CERN-EP-2017-190

Experiments:

CERN-LHC-LHCb

View in:

reference search19 citations

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Abstract: (APS)

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.

Note:

'All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-022.html

p p: scattering
p p: colliding beams
B0: rare decay
B0: hadronic decay
B0: branching ratio: measured
B/s0: hadronic decay
B/s0: branching ratio: upper limit
decay modes
statistical
LHC-B

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Figures(2)

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