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Analysis of the Decay D⁰ to K⁰_S pi⁰ pi⁰

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arxiv 1106.3103 v1 pith:MH622TC2 submitted 2011-06-15 hep-ex

Analysis of the Decay D⁰ to K⁰_S pi⁰ pi⁰

CLEO Collaboration: N. Lowrey , S. Mehrabyan , M. Selen , J. Wiss , J. Libby , M. Kornicer , R. E. Mitchell , M. R. Shepherd
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C. M. Tarbert D. Besson T. K. Pedlar J. Xavier D. Cronin-Hennessy J. Hietala P. Zweber S. Dobbs Z. Metreveli K. K. Seth A. Tomaradze T. Xiao S. Brisbane L. Martin A. Powell P. Spradlin G. Wilkinson H. Mendez J. Y. Ge D. H. Miller I. P. J. Shipsey B. Xin G. S. Adams D. Hu B. Moziak J. Napolitano K. M. Ecklund J. Insler H. Muramatsu C. S. Park L. J. Pearson E. H. Thorndike F. Yang S. Ricciardi C. Thomas M. Artuso S. Blusk R. Mountain T. Skwarnicki S. Stone J. C. Wang L. M. Zhang 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. Fields 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
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classification hep-ex
keywords analysisdecaythreeaccumulatedbackgroundbeenbranchingcandidates
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We present the results of a Dalitz plot analysis of D^0 to K^0_S pi^0 pi^0 using the CLEO-c data set of 818 inverse pico-barns of e^+ e^- collisions accumulated at sqrt{s} = 3.77 GeV. This corresponds to three million D^0 D^0-bar pairs from which we select 1,259 tagged candidates with a background of 7.5 +- 0.9 percent. Several models have been explored, all of which include the K^*(892), K^*_2(1430), K^*(1680), the f_0(980), and the sigma(500). We find that the combined pi^0 pi^0 S-wave contribution to our preferred fit is (28.9 +- 6.3 +- 3.1)% of the total decay rate while D^0 to K^*(892)^0 pi^0 contributes (65.6 +- 5.3 +- 2.5)%. Using three tag modes and correcting for quantum correlations we measure the D^0 to K^0_S pi^0 pi^0 branching fraction to be (1.059 +- 0.038 +- 0.061)%.

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