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

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 $\tau$-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.

7 latex pages, 4 figures

References in corpus (3)

• Gauge Invariant Lagrangians for Free and Interacting Higher Spin Fields. A Review of the BRST formulation
• Bepcii and Besiii
• Clean Prediction of \CP violating processes $\psi$, $\varphi$ and ${\rm Y}(1S)$ decay to KsKs and KLKL