Evidence for CP violation in time-integrated $D^0 \to h^-h^+$ decay rates - INSPIRE

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Evidence for CP violation in time-integrated $D^0 \to h^-h^+$ decay rates

LHCb

Collaboration

Dec, 2011

8 pages

Published in:

Phys.Rev.Lett. 108 (2012) 111602

e-Print:

1112.0938 [hep-ex]

DOI:

PDG:

\Delta \mathit A_{CP}

\mathit A_{CP}({{\mathit K}^{+}}{{\mathit K}^{-}}

\mathit A_{CP}({{\mathit \pi}^{+}}{{\mathit \pi}^{-}}

Report number:

LHCB-PAPER-2011-023,
CERN-PH-EP-2011-208

Experiments:

CERN-LHC-LHCb

View in:

reference search393 citations

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Abstract:

A search for time-integrated CP violation in D0 -> h-h+ (h=K, pi) decays is presented using 0.62 fb^-1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*+ -> D0 pi+ and D*- -> D0bar pi- decay chains. The difference in CP asymmetry between D0 -> K-K+ and D0 -> pi-pi+, Delta ACP = ACP(K-K+) - ACP(pi-pi+), is measured to be [-0.82 \pm 0.21(stat.) \pm 0.11(syst.)]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.

11.30.Er
13.25.Ft
13.85.Ni
p p: interaction
D*(2010): hadronic decay
D0: hadronic decay
pi: pair production
K: pair production
particle identification: flavor
CP: violation

References(14)

Figures(3)

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