Complete electroweak matching for radiative B decays
We compute the complete two-loop O(alpha) Wilson coefficients relevant for radiative decays of the B meson in the SM. This is a necessary step in the calculation of the O(alpha alpha_s^n ln^n m_b/M_W) corrections and improves on our previous analysis of electroweak effects in B -> X_s gamma....
| Main Authors: | , |
|---|---|
| Format: | Journal article |
| Published: |
2001
|
| _version_ | 1826258469280284672 |
|---|---|
| author | Gambino, P Haisch, U |
| author_facet | Gambino, P Haisch, U |
| author_sort | Gambino, P |
| collection | OXFORD |
| description | We compute the complete two-loop O(alpha) Wilson coefficients relevant for radiative decays of the B meson in the SM. This is a necessary step in the calculation of the O(alpha alpha_s^n ln^n m_b/M_W) corrections and improves on our previous analysis of electroweak effects in B -> X_s gamma. We describe in detail several interesting technical aspects of the calculation and include all dominant QED matrix elements. In our final result, we neglect only terms originated from the unknown O(alpha alpha_s) evolution of the Wilson coefficients and some suppressed two-loop matrix elements. Due to the compensation among different effects, we find that non-trivial electroweak corrections decrease the branching ratio by about 3.6% for a light Higgs boson, very close to our previous result. The corresponding up-to-date SM prediction for the branching ratio with E_gamma > 1.6 GeV is (3.61 +- 0.30) x 10^-4. |
| first_indexed | 2024-03-06T18:34:28Z |
| format | Journal article |
| id | oxford-uuid:0ac05a26-39de-4433-b324-f49d27011ecd |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:34:28Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:0ac05a26-39de-4433-b324-f49d27011ecd2022-03-26T09:25:36ZComplete electroweak matching for radiative B decaysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0ac05a26-39de-4433-b324-f49d27011ecdSymplectic Elements at Oxford2001Gambino, PHaisch, UWe compute the complete two-loop O(alpha) Wilson coefficients relevant for radiative decays of the B meson in the SM. This is a necessary step in the calculation of the O(alpha alpha_s^n ln^n m_b/M_W) corrections and improves on our previous analysis of electroweak effects in B -> X_s gamma. We describe in detail several interesting technical aspects of the calculation and include all dominant QED matrix elements. In our final result, we neglect only terms originated from the unknown O(alpha alpha_s) evolution of the Wilson coefficients and some suppressed two-loop matrix elements. Due to the compensation among different effects, we find that non-trivial electroweak corrections decrease the branching ratio by about 3.6% for a light Higgs boson, very close to our previous result. The corresponding up-to-date SM prediction for the branching ratio with E_gamma > 1.6 GeV is (3.61 +- 0.30) x 10^-4. |
| spellingShingle | Gambino, P Haisch, U Complete electroweak matching for radiative B decays |
| title | Complete electroweak matching for radiative B decays |
| title_full | Complete electroweak matching for radiative B decays |
| title_fullStr | Complete electroweak matching for radiative B decays |
| title_full_unstemmed | Complete electroweak matching for radiative B decays |
| title_short | Complete electroweak matching for radiative B decays |
| title_sort | complete electroweak matching for radiative b decays |
| work_keys_str_mv | AT gambinop completeelectroweakmatchingforradiativebdecays AT haischu completeelectroweakmatchingforradiativebdecays |