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Measurement of CP asymmetries in D±→η′π± and D±s→η′π± decays

Abstract : A search for CP violation in D±→η′π± and D±s→η′π± decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 3 fb−1, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The measured CP-violating charge asymmetries are ACP(D±→η′π±)=(−0.61±0.72±0.55±0.12)% and ACP(D±s→η′π±)=(−0.82±0.36±0.24±0.27)%, where the first uncertainties are statistical, the second systematic, and the third are the uncertainties on the ACP(D±→K0Sπ±) and ACP(D±s→ϕπ±) measurements used for calibration. The results represent the most precise measurements of these asymmetries to date.
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Submitted on : Thursday, January 12, 2017 - 3:49:17 PM
Last modification on : Friday, January 7, 2022 - 3:43:22 AM

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R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Measurement of CP asymmetries in D±→η′π± and D±s→η′π± decays. Physics Letters B, Elsevier, 2017, 771, pp. 21-30. ⟨10.1016/j.physletb.2017.05.013⟩. ⟨in2p3-01433321⟩



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