Rare Ab→Al+l- decays with polarized A

Chuan Hung Chen, C. Q. Geng

研究成果: Article

41 引文 斯高帕斯(Scopus)


We investigate the rare baryonic exclusive decays of Ab→Al+l- (l=e,μ,τ) with polarized A. Under the approximation of the heavy quark effective theory, in the standard model we derive the differential decay rates and various polarization asymmetries by including lepton mass effects. We find that with the long-distance effects the decay branching ratios are 5.3× 10-5 for Ab→Al+l- (l=e,μ) and 1.1× 10-5 for Ab→Aτ+τ-. The effects of new physics in the decay rates are also discussed. The integrated longitudinal A polarizations are - 0.31 and -0.12, while that of the normal ones 0.02 and 0.01, for di-muon and tau modes, respectively. The CP-odd transverse polarization of A is zero in the standard model but it is expected to be sizable in some theories with new physics.

期刊Physical Review D
出版狀態Published - 2001 十二月 1

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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