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

Using perturbative QCD, the contribution at the leading twist, leading$\alpha_s$ level, of charm and up quark loops to the decays $B \rightarrow K^*\gamma$ and $B \rightarrow \rho \gamma$ is presented. In the case of $B\rightarrow \rho \gamma$, the relative importance of these contributions dependupon the unknown CKM matrix elements $V_{bu}$ and $V_{td}$.  Assuming that the ratio $r = V_{bc}V^*_{cd}/V_{bt}V^*_{td}$ is boundedbetween $-2.25 \le r \le -.5$ as is suggested by the Particle Data Group, theerror in extracting $ |V_{td}/V_{ts}| $ by these decays is estimated.Comment: 4 double column pages, revtex, 3 figures attached, 2 figures added  indicating less optimism concerning the accuracy at which $|V_{td}/V_{ts}|$  can be extracted: to appear in PR

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Double penguin diagrams and the contribution of vector-meson-like states to the decays<i>B</i>→<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">K</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">*</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>γ,<i>B</i>→ργ

Double penguin diagrams and the contribution of vector-meson-like states to the decaysB→K*γ,B→ργ