arXiv 1106.31032011-06-15hep-ex

D^0衰变为K^0_Spi^0 pi^0的分析

Analysis of the Decay D^0 to K^0_S pi^0 pi^0

CLEO Collaboration, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, J. Libby, M. Kornicer, R. E. Mitchell, M. R. Shepherd, C. M. Tarbert, D. Besson, T. K. Pedlar, J… 展开作者

CLEO Collaboration, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, J. Libby, M. Kornicer, R. E. Mitchell, M. R. Shepherd, 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

备注：: 11 pages, 3 figures, available through http://www.lns.cornell.edu/public/CLNS/, submitted to PRD
DOI：: 10.1103/PhysRevD.84.092005

阅读 PDF

arXiv 页面 ↗HTML 原文 ↗

摘要：

我们利用在sqrt{s} = 3.77 GeV处积累的818个e^+ e^-碰撞的逆皮仓的CLEO-c数据集，给出了D^0到K^0_S pi^0 pi^0的Dalitz图分析结果。这相当于300万个D^0 D^0-bar对，我们从中选择了1,259个标记的候选者，背景为7.5% ± 0.9%。已经探索了几种模型，所有这些模型都包括K^*（892）、K^*_2（1430）、K^*（1680）、f_0（980）和sigma（500）。我们发现，π ^0 π ^0 S波的组合对我们的首选拟合的贡献是总衰变率的（28.9 +- 6.3 +- 3.1）%，而D^0到K^*（892）^0 π ^0的贡献是（65.6 +- 5.3 +- 2.5）%。使用三种标记模式并校正量子相关，我们测量到D^0到K^0_S pi^0 pi^0的分支分数为（1.059 +- 0.038 +- 0.061）%。

英文摘要：

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)%.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文