Electroweak penguin contributions to non-leptonic δf = 1 decays at NNLO
We calculate the θ(αs) corrections to the Z°-penguin and electroweak box diagrams relevant for non-leptonic ΔF = 1 decays with F = S,B. This calculation provides the complete O(αwαs) and θ(αwαssin2θwm2t) corrections (αw = α/sin2θw) to the Wilson coefficients of the electroweak penguin four quark ope...
| Autori principali: | , , |
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| Natura: | Journal article |
| Lingua: | English |
| Pubblicazione: |
2000
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| _version_ | 1826276724867858432 |
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| author | Buras, A Gambino, P Haisch, U |
| author_facet | Buras, A Gambino, P Haisch, U |
| author_sort | Buras, A |
| collection | OXFORD |
| description | We calculate the θ(αs) corrections to the Z°-penguin and electroweak box diagrams relevant for non-leptonic ΔF = 1 decays with F = S,B. This calculation provides the complete O(αwαs) and θ(αwαssin2θwm2t) corrections (αw = α/sin2θw) to the Wilson coefficients of the electroweak penguin four quark operators relevant for non-leptonic K- and B-decays. We argue that this is the dominant part of the next-next-to-leading (NNLO) contributions to these coefficients. Our results allow us to reduce considerably the uncertainty due to the definition of the top quark mass present in the existing NLO calculations of non-leptonic decays. The NNLO corrections to the coefficient of the color singlet (V - A) ⊗ (V - A) electro weak penguin operator Q9 relevant for B-decays are generally moderate, amount to a few percent for the choice mt(μt = mt) and depend only weakly on the renormalization scheme. Larger NNLO corrections with substantial scheme dependence are found for the coefficients of the remaining electroweak penguin operators Q7, Q8 and Q10. In particular, the strong scheme dependence of the NNLO corrections to C8 allows us to reduce considerably the scheme dependence of C8(Q8)2 relevant for the ratio ε′ / ε. © 2000 Elsevier Science B.V. All rights reserved. |
| first_indexed | 2024-03-06T23:18:11Z |
| format | Journal article |
| id | oxford-uuid:67d76ea7-4e17-45d2-861d-393f6c7331fc |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:18:11Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:67d76ea7-4e17-45d2-861d-393f6c7331fc2022-03-26T18:40:58ZElectroweak penguin contributions to non-leptonic δf = 1 decays at NNLOJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:67d76ea7-4e17-45d2-861d-393f6c7331fcEnglishSymplectic Elements at Oxford2000Buras, AGambino, PHaisch, UWe calculate the θ(αs) corrections to the Z°-penguin and electroweak box diagrams relevant for non-leptonic ΔF = 1 decays with F = S,B. This calculation provides the complete O(αwαs) and θ(αwαssin2θwm2t) corrections (αw = α/sin2θw) to the Wilson coefficients of the electroweak penguin four quark operators relevant for non-leptonic K- and B-decays. We argue that this is the dominant part of the next-next-to-leading (NNLO) contributions to these coefficients. Our results allow us to reduce considerably the uncertainty due to the definition of the top quark mass present in the existing NLO calculations of non-leptonic decays. The NNLO corrections to the coefficient of the color singlet (V - A) ⊗ (V - A) electro weak penguin operator Q9 relevant for B-decays are generally moderate, amount to a few percent for the choice mt(μt = mt) and depend only weakly on the renormalization scheme. Larger NNLO corrections with substantial scheme dependence are found for the coefficients of the remaining electroweak penguin operators Q7, Q8 and Q10. In particular, the strong scheme dependence of the NNLO corrections to C8 allows us to reduce considerably the scheme dependence of C8(Q8)2 relevant for the ratio ε′ / ε. © 2000 Elsevier Science B.V. All rights reserved. |
| spellingShingle | Buras, A Gambino, P Haisch, U Electroweak penguin contributions to non-leptonic δf = 1 decays at NNLO |
| title | Electroweak penguin contributions to non-leptonic δf = 1 decays at NNLO |
| title_full | Electroweak penguin contributions to non-leptonic δf = 1 decays at NNLO |
| title_fullStr | Electroweak penguin contributions to non-leptonic δf = 1 decays at NNLO |
| title_full_unstemmed | Electroweak penguin contributions to non-leptonic δf = 1 decays at NNLO |
| title_short | Electroweak penguin contributions to non-leptonic δf = 1 decays at NNLO |
| title_sort | electroweak penguin contributions to non leptonic δf 1 decays at nnlo |
| work_keys_str_mv | AT burasa electroweakpenguincontributionstononleptonicdf1decaysatnnlo AT gambinop electroweakpenguincontributionstononleptonicdf1decaysatnnlo AT haischu electroweakpenguincontributionstononleptonicdf1decaysatnnlo |