Amplitude analysis of D0->K+K-pi+pi-

M. Artuso; S. Blusk; R. Mountain; T. Skwarnicki; S. Stone; L. M.; Zhang; T. Gershon; G. Bonvicini; D. Cinabro; A. Lincoln; M. J. Smith; P.; Zhou; J. Zhu; P. Naik; J. Rademacker; D. M. Asner; K. W. Edwards; K.; Randrianarivony; G. Tatishvili; R. A. Briere; H. Vogel; P. U. E. Onyisi; J.; L. Rosner; J. P. Alexander; D. G. Cassel; S. Das; R. Ehrlich; L. Gibbons; S.; W. Gray; D. L. Hartill; B. K. Heltsley; D. L. Kreinick; V. E. Kuznetsov; J.; R. Patterson; D. Peterson; D. Riley; A. Ryd; A. J. Sadoff; X. Shi; W. M. Sun,; J. Yelton; P. Rubin; N. Lowrey; S. Mehrabyan; M. Selen; J. Wiss; J. Libby; M.; Kornicer; R. E. Mitchell; D. Besson; T. K. Pedlar; D. Cronin-Hennessy; J.; Hietala; S. Dobbs; Z. Metreveli; K. K. Seth; A. Tomaradze; T. Xiao; L.; Martin; A. Powell; P. Spradlin; G. Wilkinson; J. Y. Ge; D. H. Miller; I. P.; J. Shipsey; B. Xin; G. S. Adams; J. Napolitano; K. M. Ecklund; J. Insler; H.; Muramatsu; C. S. Park; L. J. Pearson; E. H. Thorndike; S. Ricciardi; and C.; Thomas (CLEO Collaboration)

arXiv:1201.5716·hep-ex·July 2, 2012

Amplitude analysis of D0->K+K-pi+pi-

M. Artuso, S. Blusk, R. Mountain, T. Skwarnicki, S. Stone, L. M., Zhang, T. Gershon, G. Bonvicini, D. Cinabro, A. Lincoln, M. J. Smith, P., Zhou, J. Zhu, P. Naik, J. Rademacker, D. M. Asner, K. W. Edwards, K., Randrianarivony, G. Tatishvili, R. A. Briere, H. Vogel

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TL;DR

This paper presents the first flavor-tagged amplitude analysis of D0 decays to K+K-pi+pi-, identifying key contributing amplitudes and assessing CP violation, with implications for measuring the CP-violating phase gamma/phi3.

Contribution

It provides the first detailed amplitude analysis of D0->K+K-pi+pi- decays and evaluates the sensitivity to gamma/phi3 using these decay modes.

Findings

01

Identified three main amplitudes: phirho0, K1(1270)+-K-+, and non-resonant K+K-pi+pi-.

02

No CP violation observed at 5-30% level among amplitudes.

03

Estimated sensitivity to gamma/phi3 as (11.3 +/- 0.3) degrees.

Abstract

The first flavor-tagged amplitude analysis of the decay D0 to the self-conjugate final state K+K-pi+pi- is presented. Data from the CLEO II.V, CLEO III, and CLEO-c detectors are used, from which around 3000 signal decays are selected. The three most significant amplitudes, which contribute to the model that best fits the data, are phirho0, K1(1270)+-K-+, and non-resonant K+K-pi+pi-. Separate amplitude analyses of D0 and D0-bar candidates indicate no CP violation among the amplitudes at the level of 5% to 30% depending on the mode. In addition, the sensitivity to the CP-violating parameter gamma/phi3 of a sample of 2000 B+ -> D0-tilde(K+K-pi+pi-)K+ decays, where D0-tilde is a D0 or D0-bar, collected at LHCb or a future flavor facility, is estimated to be (11.3 +/- 0.3) degrees using the favored model.

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