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research article
Evidence for CP Violation in Time- Integrated D-0 -> h(-)h(+) Decay Rates
A search for time-integrated CP violation in D-0 -> 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*(+) -> D-0 pi(+) and D*(-) -> (D) over bar (0)pi(-) decay chains. The difference in CP asymmetry between D-0 -> K-K+ and D-0 -> pi(-)pi(+), Delta A(CP) A(CP)(K-K+) - A(CP)(pi(-)pi(+)), is measured to be [-0.82 +/- 0.21(stat) +/- 0.11(syst) +/-]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations.
Type
research article
Web of Science ID
WOS:000301345000005
Authors
Aaij, R.
•
Abellan Beteta, C.
•
Adeva, B.
•
Adinolfi, M.
•
Adrover, C.
•
Affolder, A.
•
Ajaltouni, Z.
•
Albrecht, J.
•
Alessio, F.
•
Alexander, M.
Publication date
2012
Published in
Volume
108
Issue
11
Article Number
111602
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
April 12, 2012
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