A simulation study on the measurement of D<SUP>0</SUP>-D<SUP>0</SUP> mixing parameter y at BESⅢ

HUANG Bin; ZHENG Yang-Heng; LI Wei-Dong

doi:10.1088/1674-1137/32/12/002

Chinese Physics C> 2008, Vol. 32> Issue(12) : 945-951 DOI: 10.1088/1674-1137/32/12/002

A simulation study on the measurement of D⁰-D⁰ mixing parameter y at BESⅢ

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Abstract：
We established a method on measuring the D⁰-D⁰ mixing parameter y for BESⅢ experiment at the BEPCⅡ e⁺e^－ collider. In this method, the doubly tagged π(3770) →D⁰-D⁰ events, with one D decays to CP-eigenstates and the other D decays semileptonically, are used to reconstruct the signals. Since this analysis requires good e/π separation, a likelihood approach, which combines the dE/dx, time of flight and the electromagnetic shower detectors information, is used for particle identification. We estimate the sensitivity of the measurement of y to be 0.007 based on a 20fb^-1 fully simulated MC sample.

References

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HUANG Bin, ZHENG Yang-Heng and LI Wei-Dong. A simulation study on the measurement of D⁰-D⁰ mixing parameter y at BESⅢ[J]. Chinese Physics C, 2008, 32(12): 945-951. doi: 10.1088/1674-1137/32/12/002

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Received: 2008-05-29
Revised: 2008-06-11

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

A simulation study on the measurement of D⁰-D⁰ mixing parameter y at BESⅢ

Corresponding author: HUANG Bin,

Received Date: 2008-05-29

Accepted Date: 2008-06-11

Available Online: 2008-12-05

Abstract: We established a method on measuring the D⁰-D⁰ mixing parameter y for BESⅢ experiment at the BEPCⅡ e⁺e^－ collider. In this method, the doubly tagged π(3770) →D⁰-D⁰ events, with one D decays to CP-eigenstates and the other D decays semileptonically, are used to reconstruct the signals. Since this analysis requires good e/π separation, a likelihood approach, which combines the dE/dx, time of flight and the electromagnetic shower detectors information, is used for particle identification. We estimate the sensitivity of the measurement of y to be 0.007 based on a 20fb^-1 fully simulated MC sample.

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A simulation study on the measurement of D⁰-D⁰ mixing parameter y at BESⅢ

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A simulation study on the measurement of D⁰-D⁰ mixing parameter y at BESⅢ

A simulation study on the measurement of D⁰-D⁰ mixing parameter y at BESⅢ