Rare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCD
We calculate the charm quark contribution to the rare decay K+ →π+ ν ν̄ in the next-to-next-to-leading order of QCD. This new contribution reduces the theoretical uncertainty in the relevant parameter P c from ± 10.1% down to ± 2.4%, corresponding to scale uncertainties of ± 1.3%, ± 1.0%, ± 0.006, a...
| मुख्य लेखकों: | , , , |
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| स्वरूप: | Journal article |
| भाषा: | English |
| प्रकाशित: |
2005
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| _version_ | 1826264119886479360 |
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| author | Buras, A Gorbahn, M Haisch, U Nierste, U |
| author_facet | Buras, A Gorbahn, M Haisch, U Nierste, U |
| author_sort | Buras, A |
| collection | OXFORD |
| description | We calculate the charm quark contribution to the rare decay K+ →π+ ν ν̄ in the next-to-next-to-leading order of QCD. This new contribution reduces the theoretical uncertainty in the relevant parameter P c from ± 10.1% down to ± 2.4%, corresponding to scale uncertainties of ± 1.3%, ± 1.0%, ± 0.006, and ± 1.2° in B (K+ →π+ ν ν̄ and in |Vtd|, sin2β extracted from the K →π+ ν ν̄ system. The error Pc0. 37±0.04 is now fully dominated by the current uncertainty of ±3.8% in the charm quark mass mc. We find B (K+ →π+ ν ν̄)=(8.0±1.1)×10-11, where the quoted error stems almost entirely from the present uncertainties in mc and the Cabibbo-Kobayashi-Maskawa elements. © 2005 The American Physical Society. |
| first_indexed | 2024-03-06T20:02:39Z |
| format | Journal article |
| id | oxford-uuid:27d844d7-e1bd-4bdc-adaa-231487b4da28 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:02:39Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:27d844d7-e1bd-4bdc-adaa-231487b4da282022-03-26T12:09:17ZRare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCDJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:27d844d7-e1bd-4bdc-adaa-231487b4da28EnglishSymplectic Elements at Oxford2005Buras, AGorbahn, MHaisch, UNierste, UWe calculate the charm quark contribution to the rare decay K+ →π+ ν ν̄ in the next-to-next-to-leading order of QCD. This new contribution reduces the theoretical uncertainty in the relevant parameter P c from ± 10.1% down to ± 2.4%, corresponding to scale uncertainties of ± 1.3%, ± 1.0%, ± 0.006, and ± 1.2° in B (K+ →π+ ν ν̄ and in |Vtd|, sin2β extracted from the K →π+ ν ν̄ system. The error Pc0. 37±0.04 is now fully dominated by the current uncertainty of ±3.8% in the charm quark mass mc. We find B (K+ →π+ ν ν̄)=(8.0±1.1)×10-11, where the quoted error stems almost entirely from the present uncertainties in mc and the Cabibbo-Kobayashi-Maskawa elements. © 2005 The American Physical Society. |
| spellingShingle | Buras, A Gorbahn, M Haisch, U Nierste, U Rare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCD |
| title | Rare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCD |
| title_full | Rare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCD |
| title_fullStr | Rare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCD |
| title_full_unstemmed | Rare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCD |
| title_short | Rare decay K+ →π+ ν ν̄ at the next-to-next-to-leading order m QCD |
| title_sort | rare decay k π ν ν̄ at the next to next to leading order m qcd |
| work_keys_str_mv | AT burasa raredecaykpnnatthenexttonexttoleadingordermqcd AT gorbahnm raredecaykpnnatthenexttonexttoleadingordermqcd AT haischu raredecaykpnnatthenexttonexttoleadingordermqcd AT niersteu raredecaykpnnatthenexttonexttoleadingordermqcd |