Measurement of CP asymmetries in D± → ηπ± and Ds±→ηπ± decays

The LHCb Collaboration

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Abstract

A search for CP violation in D±→η′π± and Ds ±→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±0.53±0.12)% and ACP(Ds ±→η′π±)=(−0.82±0.36±0.22±0.27)%, where the first uncertainties are statistical, the second systematic, and the third are the uncertainties on the ACP(D±→KS 0π±) and ACP(Ds ±→ϕπ±) measurements used for calibration. The results represent the most precise measurements of these asymmetries to date.
Original languageEnglish
Pages (from-to)21-30
Number of pages8
JournalPhysics Letters B
Volume771
DOIs
Publication statusPublished - 2017
Externally publishedYes

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