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

Using samples of 102 million $\Upsilon(1S)$ and 158 million $\Upsilon(2S)$events collected with the Belle detector, we study exclusive hadronic decays ofthese two bottomonium resonances to $\ks K^+ \pi^-$ and charge-conjugate (c.c.)states, $\pi^+ \pi^- \pi^0 \pi^0$, and $\pi^+ \pi^- \pi^0$, and to the two-bodyVector-Pseudoscalar ($K^{\ast}(892)^0\bar{K}^0+ {\rm c.c.}$,$K^{\ast}(892)^-K^+ + {\rm c.c.}$, $\omega\pi^0$, and $\rho\pi$) final states.For the first time, signals are observed in the modes $\Upsilon(1S) \to \ks K^+\pi^- + {\rm c.c.}$, $\pi^+ \pi^- \pi^0 \pi^0$, and $\Upsilon(2S) \to \pi^+\pi^- \pi^0 \pi^0$, and evidence is found for the modes $\Upsilon(1S)\to \pi^+\pi^- \pi^0$, $K^{\ast}(892)^0 \bar{K}^0+ {\rm c.c.}$, and $\Upsilon(2S) \to\ks K^+ \pi^- + {\rm c.c.}$ Branching fractions are measured for all theprocesses, while 90% confidence level upper limits on the branching fractionsare also set for the modes with a statistical significance of less than$3\sigma$. The ratios of the branching fractions of $\Upsilon(2S)$ and$\Upsilon(1S)$ decays into the same final state are used to test a perturbativeQCD prediction for OZI-suppressed bottomonium decays.

Measurement of exclusive $\Upsilon(1S)$ and $\Upsilon(2S)$ decays into Vector-Pseudoscalar final states