Full One-Loop Radiative Corrections to the Asymmetry Parameter of Polarised Neutron Beta Decay
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چکیده
We present a calculation of full one-loop radiative corrections, including the constant term, to the asymmetry parameter of polarised neutron beta decay. This gives the radiative correction to the axial coupling constant gA extracted from the beta asymmetry so that it ties to gA that appears in neutron decay lifetime in a consistent renormalisation scheme. We find that the ratio of axial-vector to vector couplings determined from the beta asymmetry, after taking account of the outer radiative correction, is related to the bare value as GA/GV = 1.0012G 0 A /G V . PACS: 12.15.Lk, 13.40.Ks, 13.15.+g
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تاریخ انتشار 2004