Determination of the Strong Phase in D0 -> K+pi- Using Quantum-Correlated Measurements

Abstract

We exploit the quantum coherence between pair-produced D0 and D0bar in psi(3770) decays to study charm mixing, which is characterized by the parameters x and y, and to make a first determination of the relative strong phase δbetween D0 -> K+pi- and D0bar -> K+pi-. Using 281 pb^-1 of e^+e^- collision data collected with the CLEO-c detector at E_cm = 3.77 GeV, as well as branching fraction input and time-integrated measurements of R_M = (x^2+y^2)/2 and R_{WS} = Gamma(D0 -> K+pi-)/Gamma(D0bar -> K+pi-) from other experiments, we find \cosδ= 1.03 +0.31-0.17 +- 0.06, where the uncertainties are statistical and systematic, respectively. By further including other mixing parameter measurements, we obtain an alternate measurement of \cosδ= 1.10 +- 0.35 +- 0.07, as well as x\sinδ= (4.4 +2.7-1.8 +- 2.9) x 10^-3 and δ= 22 +11-12 +9-11 degrees.

arXiv comment5 pages, also available through http://www.lns.cornell.edu/public/CLNS/2007/. Incorporated referees' comments

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Cited by in corpus (23)

• Flavor Physics in the Quark Sector
• Charm Meson Decays
• Measurement of D0-antiD0 mixing parameters using D0 -> K0S pi+ pi- and D0 -> KS0 K+ K- decays
• Measurements of D Meson Decays to Two Pseudoscalar Mesons
• On the Measurement of the Unitarity Triangle Angle gamma from B^0 -> DK^{*0} Decays
• First model-independent determination of the relative strong phase between D0 and D0B --> K0Spi+pi- and its impact on the CKM Angle gamma/phi3 measurement
• Absolute Branching Fraction Measurements for Exclusive $D_s$ Semileptonic Decays
• Updated Measurement of the Strong Phase in D0 --> K+pi- Decay Using Quantum Correlations in e+e- --> D0 D0bar at CLEO
• Contributions to the width difference in the neutral $D$ system from hadronic decays
• Prospects for the Measurement of the Unitarity Triangle Angle gamma from B0 to DK+pi- Decays
• Measurement of absolute branching fractions of inclusive semileptonic decays of charm and charmed-strange mesons
• Brief Review of Charm Physics
• Model-independent $D^0-\overline{D^0}$ mixing and CP violation studies with $D^0\to K_{\mathrm{S}}^0{\pi }^{+}{\pi }^{-}$ and $D^0\to K_{\mathrm{S}}^0{K}^{+}{K}^{-}$
• Double Dalitz Plot Analysis of the Decay B^0 -> D K+ Pi-, D -> Ks Pi+ Pi-
• Extracting CP violation and strong phase in D decays by using quantum correlations in psi(3770)-> D0\bar{D}0 -> (V1V2)(V3V4) and psi(3770)->D0\bar{D}0 -> (V1V2)(K pi)
• Relative phases in Dalitz plot amplitudes for $D^0\to K_S{\pi }^{+}{\pi }^{-}$ and $D^0\to {\pi }^0{K}^{+}{K}^{-}$
• Novel correlated $D^0\overline{D}{}^0$ systems for $c/b$ physics and tests of $T/CPT$
• Experimental constraints from flavour changing processes and physics beyond the Standard Model
• Charm Meson Mixing: An Experimental Review
• Advances in Open Charm Physics at CLEO-c
• Hidden and open charm at Belle (and elsewhere)
• Charm Mixing and CP-violations - Theory
• Flavour physics at CLEO-c