Observation of the annihilation decay mode $B^{0}\to K^{+}K^{-}$ - INSPIRE

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Observation of the annihilation decay mode $B^{0}\to K^{+}K^{-}$

LHCb

Collaboration

Oct 26, 2016

9 pages

Published in:

Phys.Rev.Lett. 118 (2017) 8, 081801

Published: Feb 21, 2017

e-Print:

1610.08288 [hep-ex]

DOI:

10.1103/PhysRevLett.118.081801

PDG:

{{\mathit B}^{0}}

\rightarrow

{{\mathit K}^{+}}{{\mathit K}^{-}}

Report number:

LHCB-PAPER-2016-036,
CERN-EP-2016-255

Experiments:

CERN-LHC-LHCb

View in:

reference search44 citations

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Abstract: (APS)

A search for the B0→K+K- decay is performed using pp-collision data collected by LHCb. The data set corresponds to integrated luminosities of 1.0 and 2.0 fb-1 at center-of-mass energies of 7 and 8 TeV, respectively. This decay is observed for the first time, with a significance of more than 5 standard deviations. The analysis also results in an improved measurement of the branching fraction for the Bs0→π+π- decay. The measured branching fractions are B(B0→K+K-)=(7.80±1.27±0.81±0.21)×10-8 and B(Bs0→π+π-)=(6.91±0.54±0.63±0.19±0.40)×10-7. The first uncertainty is statistical, the second is systematic, the third is due to the uncertainty on the B0→K+π- branching fraction used as a normalization. For the Bs0 mode, the fourth accounts for the uncertainty on the ratio of the probabilities for b quarks to hadronize into Bs0 and B0 mesons.

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-2016-036.html

p p: scattering
p p: colliding beams
B0: hadronic decay
B/s0: hadronic decay
K: pair production
pi: pair production
B0: branching ratio: measured
B/s0: branching ratio: measured
annihilation
decay modes

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