Daniel King
Bs mixing observables and |Vtd/Vts| from sum rules
King, Daniel; Lenz, Alexander; Rauh, Thomas
Authors
Alexander Lenz
Thomas Rauh
Abstract
We consider the effects of a non-vanishing strange-quark mass in the determination of the full basis of dimension six matrix elements for Bs mixing, in particular we get for the ratio of the V − A Bag parameter in the Bs and Bd system: B s Q1 /B d Q1 = 0.987+0.007 −0.009. Combining these results with the most recent lattice values for the ratio of decay constants fBs /fBd we obtain the most precise determination of the ratio ξ = fBs q B s Q1 /fBd q B d Q1 = 1.2014+0.0065 −0.0072 in agreement with recent lattice determinations. We find ∆Ms = (18.5 +1.2 −1.5 )ps−1 and ∆Md = (0.547+0.035 −0.046)ps−1 to be consistent with experiments at below one sigma. Assuming the validity of the SM, our calculation can be used to directly determine the ratio of CKM elements |Vtd/Vts| = 0.2045+0.0012 −0.0013, which is compatible with the results from the CKM fitting groups, but again more precise.
Citation
King, D., Lenz, A., & Rauh, T. (2019). Bs mixing observables and |Vtd/Vts| from sum rules. Journal of High Energy Physics, 2019(5), Article 34. https://doi.org/10.1007/jhep05%282019%29034
Journal Article Type | Article |
---|---|
Acceptance Date | May 26, 2019 |
Online Publication Date | May 30, 2019 |
Publication Date | May 31, 2019 |
Deposit Date | May 29, 2019 |
Publicly Available Date | May 29, 2019 |
Journal | Journal of High Energy Physics |
Print ISSN | 1126-6708 |
Electronic ISSN | 1029-8479 |
Publisher | Scuola Internazionale Superiore di Studi Avanzati (SISSA) |
Peer Reviewed | Peer Reviewed |
Volume | 2019 |
Issue | 5 |
Article Number | 34 |
DOI | https://doi.org/10.1007/jhep05%282019%29034 |
Public URL | https://durham-repository.worktribe.com/output/1295679 |
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Published Journal Article
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Publisher Licence URL
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Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
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