TY - JOUR
ID - Digital.CSIC
A1 - Jamin, Matthias
A1 - Pich, Antonio
Y1 - 1994-08-22
SN - 0550-3213
UR - http://hdl.handle.net/10261/33299
N2 - The two-point functions for ?S = 1 current-current and QCD-penguin operators, as well as for the ?S = 2 operator, are calculated at the next-to-leading order. The calculation is performed in two different renormalization schemes for ?5, and the compatibility of the results obtained in the two schemes is verified. The scale- and scheme-invariant combinations of spectral two-point functions and corresponding Wilson coefficients are constructed and analyzed. For ?S = 1, the QCD corrections to the CP-conserving part, dominated by current-current operators, are 40?120% at q2 = (1?3 GeV)2, whereas the corrections to the imaginary part, mainly coming from the penguin operator Q6, are 100?240%. The large size of the gluonic corrections to current-current operators provides a qualitative understanding of the observed enhancement of ?I = 1/2 transitions. In the ?S = 2 sector the QCD corrections are quite moderate (??20%).
PB - Elsevier
T1 - QCD corrections to inclusive ?S = 1, 2 transitions at the next-to-leading order
ER -