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arXiv 1601.06985hep-exnucl-ex
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使用KLOE检测器精确测量$η\toπ^+π^-π^0$ Dalitz图分布

Precision measurement of the $η\toπ^+π^-π^0$ Dalitz plot distribution with the KLOE detector

2 Collaboration, A. Anastasi, D. Babusci, G. Bencivenni, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, B. Cao, F. Ceradini… 展开作者

2 Collaboration, A. Anastasi, D. Babusci, G. Bencivenni, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D'Agostini, E. Dané, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, R. Di Salvo, D. Domenici, A. D'Uffizi, A. Fantini, G. Felici, S. Fiore, A. Gajos, P. Gauzzi, G. Giardina, S. Giovannella, E. Graziani, F. Happacher, L. Heijkenskjöld, W. Ikegami Andersson, T. Johansson, D. Kamińska, W. Krzemien, A. Kupsc, S. Loffredo, G. Mandaglio, M. Martini, M. Mascolo, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, M. Papenbrock, A. Passeri, V. Patera, E. Perez del Rio, A. Ranieri, P. Santangelo, I. Sarra, M. Schioppa, M. Silarski, F. Sirghi, L. Tortora, G. Venanzoni, W. Wiślicki, M. Wolke

摘要:

利用在DA $Φ$ NE的KLOE探测器收集的$1.6$ fb $^{-1}$的$e^+ e^-\toϕ\toηγ$数据,用世界上最大的$\sim 4.7 \cdot 10^6$事件样本研究了$η\to π^+ π^- π^0$衰变的Dalitz图分布。Dalitz图密度被参数化为归一化无量纲变量$X$和$Y$中的多项式展开至三次项。该实验对展开式的所有电荷共轭守恒项敏感,包括$gX^2Y$项。所有参数的统计不确定性相对于早期测量提高了两倍。

英文摘要:

Using $1.6$ fb$^{-1}$ of $e^+ e^-\toϕ\toηγ$ data collected with the KLOE detector at DA$Φ$NE, the Dalitz plot distribution for the $η\to π^+ π^- π^0$ decay is studied with the world's largest sample of $\sim 4.7 \cdot 10^6$ events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables $X$ and $Y$. The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a $gX^2Y$ term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements.

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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