D0-D0 mixing sensitivity estimation at Belle Ⅱ in wrong-sign decays D0&rarr;K+&pi;-&pi;0 via time-dependent amplitude analysis

Long-Ke Li; Ye-Qi Chen; Wen-Biao Yan; Zi-Ping Zhang

doi:10.1088/1674-1137/41/2/023001

Chinese Physics C> 2017, Vol. 41> Issue(2) : 023001 DOI: 10.1088/1674-1137/41/2/023001

D⁰-D⁰ mixing sensitivity estimation at Belle Ⅱ in wrong-sign decays D⁰→K⁺π^-π⁰ via time-dependent amplitude analysis

1.
University of Science and Technology of China, Hefei 230026, China

Abstract
HTML
Reference
Related

PDF

Abstract：
The sensitivity of the D⁰-D⁰ mixing parameters x and y is estimated in the wrong-sign decay D⁰→K⁺π^-π⁰ by time-dependent amplitude analysis. The resolution of the D⁰ 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 σ=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 D⁰-D⁰ mixing parameters are σ_x=0.057% and σ_y=0.049%. These are about an order of magnitude improvement on current experimental results, without considering background effects.
- D0-D0 mixing ,
- sensitivity estimation ,
- time-dependent amplitude analysis ,
- wrong-sign decay ,
- Belle Ⅱ

References

[1]	K. A. Olive et al (Particle Data Group), Chin. Phys. C, 38:090001 (2014)
[2]	Xing Zhi-Zhong, Chin. Phys. C, 32:483-487 (2008)
[3]	S. L. Glashow, J. Iliopoulos, and L. Maiani, Phys. Rev. D, 2:1285(1970)
[4]	A. F. Falk et al, Phys. Rev. D, 65:054034(2002)
[5]	R. Aaij et al (LHCb Collaboration), Phys. Rev. Lett., 111:241801(2013)
[6]	T. Aaltonen et al (CDF Collaboration), Phys. Rev. Lett., 111:231802(2013)
[7]	B. R. Ko et al (Belle Collaboration), Phys. Rev. Lett., 112:111801(2014)
[8]	R. Aaij et al (LHCb Collaboration), Phys. Rev. Lett., 116:241801(2016)
[9]	B. Aubert et al (BaBar Collaboration), Phys. Rev. Lett., 103:211801(2009)
[10]	Botjan Golob, Karim Trabelsi, and Philip Urquijo, BELLE2-NOTE-0021
[11]	X. C. Tian et al (Belle Collaboration), Phys. Rev. Lett., 95:231801(2005)
[12]	S. Kopp et al (CLEO Collaboration), Phys. Rev. D, 63:092001(2001)
[13]	Charles Zemach, Phys. Rev., 133:B1201(1964); Charles Zemach, Phys. Rev., 140:B109(1965)
[14]	T. Peng et al (Belle Collaboration), Phys. Rev. D, 89:091103(R) (2014)
[15]	T. Abe et al KEK Report 2010-1, arXiv:1011.0352[physics.ins-det]
[16]	G. Casarosa, Belle Ⅱ Decay Time Resolution, Presented at the 2nd Belle Ⅱ Theory Interface Platform Workshop (Krakow, April 2015)
[17]	D. J. Lange, Nucl. Instrum. Methods A, 462:152-155 (2001)
[18]	L. K. Li, W. B. Yan, and Z. P. Zhang, Belle Note 1381
[19]	M. Pelliccioni, Measurement of D0-D0 Mixing with a Time-Dependent Amplitude Analysis of D0K+-0, SLAC-R-1017, Ph. D. Thesis (SLAC National Accelerator Laboratory, Stanford University, Stanford CA 94309, 2009)

Access

Get Citation

Long-Ke Li, Ye-Qi Chen, Wen-Biao Yan and Zi-Ping Zhang. D⁰-D⁰ mixing sensitivity estimation at Belle Ⅱ in wrong-sign decays D⁰→K⁺π^-π⁰ via time-dependent amplitude analysis[J]. Chinese Physics C, 2017, 41(2): 023001. doi: 10.1088/1674-1137/41/2/023001

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2016-09-21
Revised: 2016-10-14

Fund

Supported by National Natural Science Foundation of China (11475164, 11475169, 11675166)

Article Metric

Article Views(3203)
PDF Downloads(62)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

D⁰-D⁰ mixing sensitivity estimation at Belle Ⅱ in wrong-sign decays D⁰→K⁺π^-π⁰ via time-dependent amplitude analysis

Corresponding author: Long-Ke Li,

Corresponding author: Ye-Qi Chen,

Corresponding author: Wen-Biao Yan,

Corresponding author: Zi-Ping Zhang,

1. University of Science and Technology of China, Hefei 230026, China

Received Date: 2016-09-21
Accepted Date: 2016-10-14
Available Online: 2017-02-05

Fund Project: Supported by National Natural Science Foundation of China (11475164, 11475169, 11675166)

Abstract: The sensitivity of the D⁰-D⁰ mixing parameters x and y is estimated in the wrong-sign decay D⁰→K⁺π^-π⁰ by time-dependent amplitude analysis. The resolution of the D⁰ 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 σ=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 D⁰-D⁰ mixing parameters are σ_x=0.057% and σ_y=0.049%. These are about an order of magnitude improvement on current experimental results, without considering background effects.