Polarized top decay into polarized W t(↑)→W(↑)+b at O(αs)
作者： M.C. Mauser , S. Groote , M. Fischer , J.G. Körner , B. Lampe
DOI: 10.1016/S0370-2693(99)00194-X
关键词: Particle physics 、 Quark 、 Physics 、 Polarization (waves) 、 Boson 、 Top quark 、 Rest frame 、 Electron–positron annihilation 、 Lepton 、 Bottom quark 、 Nuclear physics
摘要: Abstract We consider the decay of a polarized top quark into W -boson plus bottom quark, followed by pair leptons or quarks. The polar angle distribution spin relative to -momentum and lepton (or quark) in -rest frame is governed three unpolarized rate functions which are related double density matrix elements t → + b . obtain analytical expressions for O ( α s ) radiative corrections functions. also provide comprehensive discussion dependence longitudinal, transverse normal polarization quarks produced at e − -colliders on beam parameters.
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