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

We present results for exclusive $b\to c$ semileptonic decays of ground statetriply-heavy baryons and for semileptonic $c\to s,d$ decays of doubly heavyground state $cb$ baryons. In both cases, we have derived for the first timeheavy quark spin symmetry relations for the hadronic amplitudes near zerorecoil. Though strictly valid in the limit of very large heavy quark masses andnear zero recoil, they turn out to be reasonable accurate for the wholeavailable phase space in these decays and for the actual heavy quark masses weuse. With these relations we have made approximate, but model independent,predictions for ratios of decay widths. In the case of spin-1/2 $cb$ baryons,we find that hyperfine mixing in the wave function has a great impact on their$c\to s,d$ decay widths.

A nonrelativistic quark model evaluation of exclusive $b\to c$  semileptonic decay of triply heavy baryons and $c\to s,d$ semileptonic decay  of $cb$ baryons