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arXiv 1306.5363hep-ex
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Ds ~+介子绝对强子分支分数的改进测量

Improved Measurement of Absolute Hadronic Branching Fractions of the Ds+ Meson

CLEO Collaboration, P. U. E. Onyisi, G. Bonvicini, D. Cinabro, M. J. Smith, P. Zhou, P. Naik, J. Rademacker, K. W. Edwards, R. A. Briere, H. Vogel, J. L. Rosner… 展开作者

CLEO Collaboration, P. U. E. Onyisi, G. Bonvicini, D. Cinabro, M. J. Smith, P. Zhou, P. Naik, J. Rademacker, K. W. Edwards, R. A. Briere, H. Vogel, 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, A. Powell, C. Thomas, G. Wilkinson, D. M. Asner, G. Tatishvili, J. Y. Ge, D. H. Miller, I. P. J. Shipsey, B. Xin, G. S. Adams, J. Napolitano, K. M. Ecklund, J. Insler, H. Muramatsu, L. J. Pearson, E. H. Thorndike, M. Artuso, S. Blusk, R. Mountain, T. Skwarnicki, S. Stone, J. C. Wang, L. M. Zhang

摘要:

Ds介子衰变的分支分数用于规范化涉及粲夸克的过程的许多测量。利用在4.17 GeV的质心能量下记录的586 pb^-1的e+ e碰撞,我们用双标记技术确定了16个重建末态中13个Ds衰变的绝对分支分数。特别地,我们精确测量了支化率B(Ds -> K-K + pi+)=(5.55 ± 0.14 ± 0.13)%,其中不确定度分别是统计的和系统的。与世界平均值相比,我们发现B(Ds -> pi+ pi 0 η ')的值显著降低,并且我们的结果使B(Ds -> η' X)$的包含性和排他性测量值一致。我们还寻找CP破坏的不对称性Ds衰变和测量的截面e+ e-> Ds* Ds在Ecm = 4.17 GeV。

英文摘要:

The branching fractions of Ds meson decays serve to normalize many measurements of processes involving charm quarks. Using 586 pb^-1 of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for 13 Ds decays in 16 reconstructed final states with a double tag technique. In particular we make a precise measurement of the branching fraction B(Ds -> K- K+ pi+) = (5.55 +- 0.14 +- 0.13)%, where the uncertainties are statistical and systematic respectively. We find a significantly reduced value of B(Ds -> pi+ pi0 eta') compared to the world average, and our results bring the inclusively and exclusively measured values of B(Ds -> eta' X)$ into agreement. We also search for CP-violating asymmetries in Ds decays and measure the cross-section of e+ e- -> Ds* Ds at Ecm = 4.17 GeV.

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。

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