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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The recent measurement of $\mathcal{B}(B^+\to K^+\nu\bar{\nu})$ by Belle-IIreveals a $2.8~\sigma$ deviation from the Standard Model (SM) prediction.Combining this with a prior Belle measurement of $\mathcal{B}(B^{0}\toK^{\ast0}\nu\bar{\nu})$, the upper bound of the ratio $\mathcal{B}(B^{0}\toK^{\ast0}\nu\bar{\nu})/\mathcal{B}(B^+\to K^+\nu\bar{\nu})$ is notably smallerthan the SM prediction. In this work, tensions are solved within the frameworkof Standard Model Effective Field Theory (SMEFT). Flavor observables, describedby Low-Energy Effective Field Theory (LEFT) operators, are interconnected bySMEFT at the electroweak scale. Utilizing a set of only four SMEFT operators,the FCNC process $b\to s\nu\bar{\nu}$ is correlated with $b\to s\ell^+\ell^-$,$b\to u_i\ell\bar{\nu}$, $u_j\to s\ell\bar{\nu}$, $u_j\to u_i\nu\bar{\nu}$, and$u_j\to u_i\ell^+\ell^-$. Subsequently, we obtain the latest ranges of Wilsoncoefficients for these four operators through a global fit that accommodatesflavor anomalies such as $R_{K^{(\ast)}}$, $R_{D^{(\ast)}}$, and$\mathcal{B}(B\to K^{(\ast)}\nu\bar{\nu})$. Our findings reveal thatpredictions for $\mathcal{B}(B^+\to \tau^+\nu_\tau)$ and $\mathcal{B}(D_s^+\to\tau^+\nu_\tau)$ align well with measured values from Belle and BESIII, basedon the fitted coefficients. The predicted branching fraction for $B^0\toK^{\ast0}\nu\bar{\nu}$ is $(1.42\pm 0.74)\times 10^{-5}$, closely approachingthe current experimental upper limit. Anticipation surrounds the rare decay$B_s\to \tau^+ \tau^-$, expected in the near future with a branching fractionon the order of $10^{-4}$.

Correlating $B\to K^{(\ast)} \nu\bar{\nu}$ and flavor anomalies in SMEFT