D0-(D)over-bar0 mixing sensitivity estimation at Belle II in wrong-sign decays D0 → K+π-π0 via time-dependent amplitude analysis

被引：1
|
作者：
Li, Long-Ke [1 ]
Chen, Ye-Qi [1 ]
Yan, Wen-Biao [1 ]
Zhang, Zi-Ping [1 ]
机构：
[1] Univ Sci & Technol China, Hefei 230026, Peoples R China
来源：
CHINESE PHYSICS C | 2017年 / 41卷 / 02期
基金：
中国国家自然科学基金;
关键词：
D-0-(D)over-bar(0) mixing; sensitivity estimation; time-dependent amplitude analysis; wrong-sign decay; Belle II;
D O I：
10.1088/1674-1137/41/2/023001
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The sensitivity of the D-0-(D) over bar (0) mixing parameters x and y is estimated in the wrong-sign decay D K+pi(-)pi(0) n by time-dependent amplitude analysis. The resolution of the D-0 lifetime is essential in time-dependent Dalitz analyses. The Belle II detector, which aims to collect a total integrated luminosity of 50 ab(-1) of data, has sigma = 140 fs in Monte Carlo studies, a factor of two improvement over that of Belle and BaBar, so the produced Dalitz signal Monte Carlo samples are smeared with this resolution. Then a time-dependent Dalitz plot fitting is performed on these smeared samples, and the sensitivity of D-0-(D) over bar (0) mixing parameters are sigma(x) = 0.057% and sigma(y) = 0.049%. These are about an order of magnitude improvement on current experimental results, without considering background effects.
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页数：8
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