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

A search for exotic decays of the Higgs boson into a pair of spin-zeroparticles, $H \rightarrow aa$, where the $a$-boson decays into $b$-quarkspromptly or with a mean proper lifetime $c\tau_a$ up to 6 mm and has a mass inthe range of $20-60$ GeV, is presented. The search is performed in events wherethe Higgs boson is produced in association with a $W$ or $Z$ boson, giving riseto a signature of one or two charged leptons (electrons or muons) and multiplejets from $b$-quark decays. The analysis is based on the dataset ofproton-proton collisions at $\sqrt{s} = 13$ TeV recorded in 2015 and 2016 bythe ATLAS detector at the CERN Large Hadron Collider, corresponding to anintegrated luminosity of 36.1 fb$^{-1}$. No significant excess of events abovethe Standard Model background prediction is observed, and 95% confidence-levelupper limits are derived for the production cross-sections for $pp \rightarrowWH$, $ZH$ and their combination, times the branching ratio of the decay chain$H \rightarrow aa \rightarrow 4b$. For $a$-bosons which decay promptly, theupper limit on the combination of cross-sections for $WH$ and $ZH$ times thebranching ratio of $H \rightarrow aa \rightarrow 4b$ ranges from 3.0 pb for$m_a= 20$ GeV to 1.3 pb for $m_a = 60$ GeV, assuming that the ratio of $WH$ to$ZH$ cross-sections follows the Standard Model prediction. For $a$-bosons withlonger proper lifetimes, the most stringent limits are 1.8 pb and 0.6 pb,respectively, at $c\tau_a \sim 0.4$ mm.

the journal of high energy physics/the journal of high energy physics

Search for the Higgs boson produced in association with a vector boson  and decaying into two spin-zero particles in the $H \rightarrow aa  \rightarrow 4b$ channel in $pp$ collisions at $\sqrt{s} = 13$ TeV with the  ATLAS detector