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 present an improved calculation of the $B\to K$ transition form factorwith chiral current in the QCD light-cone sum rule (LCSR) approach. Under thepresent approach, the most uncertain twist-3 contribution is eliminated. Andthe contributions from the twist-2 and the twist-4 structures of the kaon wavefunction are discussed, including the $SU_f(3)$-breaking effects. One-loopradiative corrections to the kaonic twist-2 contribution together with theleading-order twist-4 corrections are studied. The $SU_f(3)$ breaking effect isobtained, $ \frac{F^{B\to K}_{+}(0)}{F^{B\to\pi}_{+}(0)}=1.16\pm 0.03$. Bycombining the LCSR results with the newly obtained perturbative QCD resultsthat have been calculated up to ${\cal O}(1/m^2_b)$ in Ref.\cite{hwf0}, wepresent a consistent analysis of the $B\to K$ transition form factor in thelarge and intermediate energy regions.

SU_f(3)-Symmetry Breaking Effects of the B\to K Transition Form Factor in the QCD Light-Cone Sum Rules