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 provide updated predictions for the hadronic decays $\bar{B}_s^0\toD_s^{(*)+} \pi^-$ and $\bar{B}^0\to D^{(*)+} K^-$. They are based on$\mathcal{O}(\alpha_s^2)$ results for the QCD factorization amplitudes atleading power and on recent results for the $\bar{B}_{(s)} \to D_{(s)}^{(*)}$form factors up to order ${\cal O}(\Lambda_{\rm QCD}^2/m_c^2)$ in theheavy-quark expansion. We give quantitative estimates of the matrix elementsentering the hadronic decay amplitudes at order ${\cal O}(\Lambda_{\rmQCD}/m_b)$ for the first time. Our results are very precise, and uncover asubstantial discrepancy between the theory predictions and the experimentalmeasurements. We explore two possibilities for this discrepancy:non-factorizable contributions larger than predicted by the QCD factorizationpower counting, and contributions beyond the Standard Model. We determine the$f_s/f_d$ fragmentation fraction for the CDF, D0 and LHCb experiments for bothscenarios.

A puzzle in $\bar{B}_{(s)}^0 \to D_{(s)}^{(*)+} \lbrace \pi^-, K^-\rbrace$ decays and extraction of the $f_s/f_d$ fragmentation fraction