TY - JOUR
T1 - QCD corrections to rare K- and B-decays for arbitrary top quark mass
AU - Buchalla, Gerhard
AU - Buras, Andrzej J.
N1 - Funding Information:
* Supported by the German Bundesministerium für Forschung und Technologie under contract 06 TM
PY - 1993/7/12
Y1 - 1993/7/12
N2 - We calculate strong interaction O(αs) corrections to rare K- and B-decays dominated by Z0-penguins and box-diagrams with virtual top quark exchanges for an arbitrary top quark mass. We find that the uncertainty in the branching ratios, due to the dependence of mt on the choice of the renormalization scale μ is reduced from O(25%) to O(3%) by including the O(αs) corrections. For the choice μ = mt with 100 GeV≤mt≤200 GeV the corrections to KL→π0νν and B→Xsνν are less than 4% and at most 13% for B → ll. For the choice μ = MW they can be as large as 20% for both types of decays. We also point out that the published branching ratios for B → ll miss an overall factor of 2.
AB - We calculate strong interaction O(αs) corrections to rare K- and B-decays dominated by Z0-penguins and box-diagrams with virtual top quark exchanges for an arbitrary top quark mass. We find that the uncertainty in the branching ratios, due to the dependence of mt on the choice of the renormalization scale μ is reduced from O(25%) to O(3%) by including the O(αs) corrections. For the choice μ = mt with 100 GeV≤mt≤200 GeV the corrections to KL→π0νν and B→Xsνν are less than 4% and at most 13% for B → ll. For the choice μ = MW they can be as large as 20% for both types of decays. We also point out that the published branching ratios for B → ll miss an overall factor of 2.
UR - http://www.scopus.com/inward/record.url?scp=0346751938&partnerID=8YFLogxK
U2 - 10.1016/0550-3213(93)90405-E
DO - 10.1016/0550-3213(93)90405-E
M3 - Article
AN - SCOPUS:0346751938
SN - 0550-3213
VL - 400
SP - 225
EP - 239
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 1-3
ER -