First observation of $CP$ violation in the decays of $B^0_s$ mesons - INSPIRE

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First observation of $CP$ violation in the decays of $B^0_s$ mesons

LHCb

Collaboration

Apr 23, 2013

9 pages

Published in:

Phys.Rev.Lett. 110 (2013) 22, 221601

Published: May 30, 2013

e-Print:

1304.6173 [hep-ex]

DOI:

10.1103/PhysRevLett.110.221601

PDG:

\mathit A_{CP}

{{\mathit B}^{0}}

\rightarrow

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

Report number:

CERN-PH-EP-2013-068,
LHCB-PAPER-2013-018

Experiments:

CERN-LHC-LHCb

View in:

reference search299 citations

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Abstract: (APS)

Using pp collision data corresponding to an integrated luminosity of 1.0 fb-1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in Bs0→K-π+ decays, ACP(Bs0→K-π+)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of Bs0 mesons. Furthermore, we provide an improved determination of direct CP violation in B0→K+π- decays, ACP(B0→K+π-)=-0.080±0.007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date.

Note:

9 pages, 2 figures, 1 table, second version with slight changes after journal review

11.30.Er
13.25.Hw
p p: scattering
p p: colliding beams
CP: violation
asymmetry: CP
B/s0: hadronic decay
B0: hadronic decay
LHC-B
CERN LHC Coll

References(35)

Figures(2)

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