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

[1]

. Bigi I I, Uraltsev N. Nucl. Phys. B, 2001, 592: 922. Burdman G, Shipsey I. Ann. Rev. Nucl. and Part. Sci.,2003, 53: 4313. Falk A F, Grossman Y, Ligeti Z. Phys. Rev. D, 2002, 65:0540344. Falk A F, Grossman Y, Ligeti Z, Petrov A A. Phys. Rev.D, 2004, 69: 1140215. Staric Met al (Belle Collaboration). Phys. Rev. Lett., 2007,98: 2118036. Aubert B et al (BABAR Collaboration). Phys. Rev. Lett.,2007, 98: 2118027. ZHANG L M et al (Belle Collaboration). Phys. Rev. Lett.,2007, 99: 1318038. Aaltonen T et al (CDF Collaboration). arXiv:0712.15679. Aubert B et al (BABAR Collaboration). arXiv:0712.224910. Bitenc U et al (Belle Collaboration). arXiv:0802.295211. Aubert B et al (BABAR Collaboration). Phys. Rev. D,2007, 76: 01401812. SUN Yong-Zhao et al. HEP NP, 2007, 31: 423-430 (in Chinese)13. CHENG Xiao-Dong et al. Phys. Rev. D, 2007, 75: 09401914. Asner D M, SUN W M. Phys. Rev. D, 2006, 73: 03402415. Asner D M et al. Int. J. Mod. Phys A, 2006, 21: 545616. Gronau M, Grossman Y, Rosner J L. Phys. Lett. B, 2001,508: 3717. XING Z Z. Phys. Rev. D, 1997, 55: 19618. XING Z Z. Phys. Lett. B, 1996, 372: 31719. LI Wei-Dong, LIU Huai-Min et al. The Offline Software forthe BES0 Experiment. Proceeding of CHEP06. Mumbai,India, 200620. DENG Zi-Yan et al. HEP NP, 2006, 30(5): 371-377(in Chinese)21. Agostinelli S et al. (Geant4 Collaboration). Nucl. Instrum.Methods A, 2003, 506: 25022. BES0 Design Report. Interior Document in Institute of High Energy Physics, 200423. QING Gang et al. HEP NP, 2008, 32(1): 1-824. HU Ji-Feng et al. HEP NP, 2007, 31(10): 893 (in Chinese)25. Harris F A et al (BES Collab.). arXiv:physics/0606059,200626. Bishop C M. Neural Networks for Pattern Recognition. Oxford:Clarendon, 1998; Beale R, Jackson T. Neural Computing:An Introduction. New York: Adam Hilger, 199127. Carli T, Koblitz B. Nucl. Instrum. Methods A, 2003, 501:576-588; Holmstrom L, Sain R, Miettinen H E. Comput.Phys. Commun., 1995, 88: 195

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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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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.