Measurement of the Difference of Time-Integrated CP Asymmetries in D0→K–K+ and D0→π–π+ Decays

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doi:10.1103/PhysRevLett.116.191601

Title: Measurement of the Difference of Time-Integrated $C P$ Asymmetries in $D^{0} \to K^{-} K^{+}$ and $D^{0} \to π^{-} π^{+}$ Decays

Journal Article · Mon May 09 00:00:00 EDT 2016 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.116.191601· OSTI ID:1525147

Aaij, R.; Abellán Beteta, C.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A. A.; Amato, S.; Amerio, S.; Amhis, Y.; An, L.; Anderlini, L.; Andreassi, G. more »

A search for CP violation in D⁰ → K^–K⁺ and D⁰ → π^–π⁺ decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb^–1, collected using the LHCb detector at center-of-mass energies of 7 and 8 TeV. The flavor of the charm meson is inferred from the charge of the pion in D*⁺ → D⁰_π+ and D*^– → D¯⁰_π– decays. The difference between the CP asymmetries in D⁰ → K^–K⁺ and D⁰ → π^–π⁺ decays, ΔA_CP ≡ A_CP(K^–K⁺) – A_CP(π^–π⁺), is measured to be [–0.10 ± 0.08 (stat) ± 0.03 (syst)]%. This is the most precise measurement of a time-integrated CP asymmetry in the charm sector from a single experiment.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: LHCb Collaboration

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1525147

Journal Information:: Physical Review Letters, Vol. 116, Issue 19; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 32 works

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