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

LHCb Collaboration

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Abstract

A search for CP violation in D±→ηπ± and Ds ±→ηπ± 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±→ηπ±)=(−0.61±0.72±0.53±0.12)% and ACP(Ds ±→ηπ±)=(−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 (US)
Pages (from-to)21-30
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume771
DOIs
StatePublished - Aug 10 2017

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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