Lepton Polarization Asymmetry in B → e^＋e^- Decay beyond the Standard Model  

作　　者：V. Bashiry 

机构地区：[1]Physics Department, Middle East Technical University, Ankara, Turkey

出　　处：《Chinese Physics Letters》2005年第9期2201-2203,共3页中国物理快报（英文版）

摘　　要：The lepton polarization asymmetry in the B → e^＋e^- decay, when one of the leptons is polarized, is investigated by using the most general form of the effective Hamiltonian. We find allowed regions for the new scalar Wilson coefficients, assuming that the experimental branching ratio is measured within 10% percent uncertainty. Then using these restrictions to the new coefficients the sensitivity of the lepton polarization asymmetry to them is studied. Moreover, it is observed that there are regions of terms describing the scalar interactions, where lepton polarization asymmetry differs from zero, which can serve as a good test for searching new physics beyond the standard model.The lepton polarization asymmetry in the B → e^＋e^- decay, when one of the leptons is polarized, is investigated by using the most general form of the effective Hamiltonian. We find allowed regions for the new scalar Wilson coefficients, assuming that the experimental branching ratio is measured within 10% percent uncertainty. Then using these restrictions to the new coefficients the sensitivity of the lepton polarization asymmetry to them is studied. Moreover, it is observed that there are regions of terms describing the scalar interactions, where lepton polarization asymmetry differs from zero, which can serve as a good test for searching new physics beyond the standard model.

分 类 号：O572[理学—粒子物理与原子核物理]