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

In this work, we recalculate the charmless pure annihilation decays $B_s\to\pi^+ \pi^-$ and $B^0 \to K^+ K^-$ by using the perturbative QCD (pQCD)factorization approach, and compare the pQCD predictions with currentlyavailable experimental measurements. We used the same set of relevant inputparameters and wave functions to make the calculations for the considered decaymodes and found the following results: (a) one can provide a consistent pQCDinterpretation for both the measured $Br(B_s^0 \to \pi^+ \pi^-)$ and $Br(B_d^0\to K^+ K^-)$ simultaneously; (b) the pQCD predictions for $Br(B_s^0 \to\pi^+\pi^-)$ obtained by different authors are well consistent with each other;(c) our new pQCD prediction for $Br(B_d^0 \to K^+K^-)$ agree very well with themeasured values from CDF and LHCb Collaboration; and (d) the CP-violatingasymmetry ${\cal A}_{CP}(B_d^0 \to K^+K^-) \approx 16%$, which is large and maybe detected at the LHCb experiment.

Revisiting the pure annihilation decays $B_s\to \pi^+ \pi^-$ and $B^0 \to K^+ K^-$: the data and the pQCD predictions