English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We combine our new results for the O(alpha_em) and O(alpha_s^2) correctionsto B_{s,d} -> l^+ l^-, and present updated branching ratio predictions forthese decays in the standard model. Inclusion of the new corrections removesmajor theoretical uncertainties of perturbative origin that have just begun todominate over the parametric ones. For the recently observed muonic decay ofthe B_s meson, our calculation gives BR(B_s -> mu^+ mu^-) = (3.65 +_ 0.23) *10^(-9).

B_{s,d} -> l+ l- in the Standard Model with Reduced Theoretical Uncertainty