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 investigate the possibility that scalar leptoquarks generate consequentialeffects on the flavor-changing neutral-current decays of charmed hadrons intofinal states with missing energy ($\not\!\!E$) carried away by either standardmodel or sterile neutrinos. We focus on scenarios involving the $R_2$, $\tildeR_2$, and $\bar S_1$ leptoquarks and take into account various pertinentconstraints, learning that meson-mixing ones and those inferred from collidersearches can be of significance. We find in particular that the branchingfractions of charmed meson decays $D\to M\!\not\!\!E$, $M=\pi,\rho$, and$D_s\to K^{(*)}\!\not\!\!E$ and singly charmed baryon decays $\Lambda_c^+\top\!\not\!\!E$ and $\Xi_c\to\Sigma\!\not\!\!E$ are presently allowed to attainthe $10^{-7}$-$10^{-6}$ levels if induced by $R_2$ and that the impact of$\tilde R_2$ is comparatively much less. In contrast, the contributions of$\bar S_1$, which couples to right-handed up-type quarks and the sterileneutrinos, could lead to branching fractions as high as order $10^{-3}$. Thissuggests that these charmed hadron decays might be within reach of the BESIIIand Belle II experiments or future super charm-tau factories and could serve aspotentially promising probes of leptoquark interactions with sterile neutrinos.

Exploring charm decays with missing energy in leptoquark models