Mass effect in polarization investigation at BEPC/BES and the B-factory

JIA Han-Bing; MA Bo-Qiang

doi:10.1088/1674-1137/37/1/013102

Chinese Physics C> 2013, Vol. 37> Issue(1) : 013102 DOI: 10.1088/1674-1137/37/1/013102

Mass effect in polarization investigation at BEPC/BES and the B-factory

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Abstract：
We consider the annihilation process of an electron-positron pair into a pair of heavier fermions when the initial electron and position beams are polarized. By calculating the polarization of the final-state particles, we discuss in detail the effect due to the produced particle masses in the τ-charm energy region at BEPC/BES, and also compare the effect with that at the B-factory. Such a study is useful for the design of possible polarization investigation at the BEPC/BES facility and the B-factory.

References

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Asner D M et al. Int. J. Mod. Phys. A, 2009, 24: S1[2] JIN S. (BES collaboration). Int. J. Mod. Phys. A, 2006, 21: 613[3] SHEN X Y. (BES collaboration). Nucl. Phys. Proc. Suppl., 2008, 185: 134[4] Harris F A. (BES collaboration). Int. J. Mod. Phys. A, 2009, 24: 377[5] LI H B, YANG M Z. Phys. Rev. Lett., 2006, 96: 192001; [arXiv:hep-ph/0511222][6] HUANG T, LU W, TAO Z J. Phys. Rev. D, 1997, 55: 1643[7] Tsai Y S. Phys. Rev. D, 1995, 51: 3172[8] Nakamura K et al. (Particle Data Group). J. Phys. G, 2010, 37: 075021

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JIA Han-Bing and MA Bo-Qiang. Mass effect in polarization investigation at BEPC/BES and the B-factory[J]. Chinese Physics C, 2013, 37(1): 013102. doi: 10.1088/1674-1137/37/1/013102

JIA Han-Bing and MA Bo-Qiang. Mass effect in polarization investigation at BEPC/BES and the B-factory[J]. Chinese Physics C, 2013, 37(1): 013102. doi: 10.1088/1674-1137/37/1/013102 shu

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Received: 2012-04-16
Revised: 2012-04-26

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沈阳化工大学材料科学与工程学院沈阳 110142

Mass effect in polarization investigation at BEPC/BES and the B-factory

JIA Han-Bing
MA Bo-Qiang

Received Date: 2012-04-16
Accepted Date: 2012-04-26
Available Online: 2013-01-05

Abstract: We consider the annihilation process of an electron-positron pair into a pair of heavier fermions when the initial electron and position beams are polarized. By calculating the polarization of the final-state particles, we discuss in detail the effect due to the produced particle masses in the τ-charm energy region at BEPC/BES, and also compare the effect with that at the B-factory. Such a study is useful for the design of possible polarization investigation at the BEPC/BES facility and the B-factory.