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Title: Model-independent determination of the relative strong-phase difference between D 0 and D ¯ 0 K S , L 0 π + π and its impact on the measurement of the CKM angle γ / ϕ 3

Journal Article · · Physical Review. D.
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Crucial inputs for a variety of $$\textit{CP}$$-violation studies can be determined through the analysis of pairs of quantum-entangled neutral $$\textit{D}$$ mesons, which are produced in the decay of the $$_ψ$$(3770) resonance. The relative strong-phase parameters between $D^0$ and $$\bar{D}^0$$ in the decays $$D^0 → K^0_{S,L}π^+π^–$$ are studied using 2.93 fb$$^{–1}$$ of $e^+e^–$ annihilation data delivered by the BEPCII collider and collected by the BESIII detector at a center-of-mass energy of 3.773 GeV. Results are presented in regions of the phase space of the decay. These are the most precise measurements to date of the strong-phase parameters in $$D → K^0_{S,L}π^+π^–$$ decays. Using these parameters, the associated uncertainty on the Cabibbo-Kobayashi-Maskawa angle $$γ/\phi_3$$ is expected to be between 0.7° and 1.2° for an analysis using the decay $$B^± → D K^±, D → K^0_Sπ^+π^–$$, where $$\textit{D}$$ represents a superposition of $D^0$ and $$\bar{D}^0$$ states. This is a factor of 3 smaller than that achievable with previous measurements. Furthermore, these results provide valuable input for charm-mixing studies, other measurements of $$\textit{CP}$$ violation, and the measurement of strong-phase parameters for other $$\textit{D}$$-decay modes.

Research Organization:
Indiana Univ., Bloomington, IN (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
BESIII Collaboration
Grant/Contract Number:
FG02-05ER41374; SC-0010118; SC-0012069; SC0010118; SC0012069
OSTI ID:
1633466
Alternate ID(s):
OSTI ID: 1800291
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Vol. 101 Journal Issue: 11; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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