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 study the potential of the LHC accelerator, and a future 33 TeV protoncollider, to observe the production of a light top squark pair in associationwith the lightest Higgs boson (${\tilde t}_1 {\tilde t}_1 h_1$), as predictedby the Next-to-Minimal Supersymmetric Standard Model (NMSSM). We scan randomlyabout ten million points of the NMSSM parameter space, allowing all possibledecays of the lightest top squark and lightest Higgs boson, with no assumptionsabout their decay rates, except for known physical constraints such asperturbative bounds, Dark matter relic density consistent with recent Planckexperiment measurements, Higgs mass bounds on the next to lightest Higgs boson,$h_2$, assuming it is consistent with LHC measurements for the Standard ModelHiggs boson, LEP bounds for the chargino mass and Z invisible width,experimental bounds on B meson rare decays and some LHC experimental bounds onSUSY particle spectra different to the particles involved in our study. We findthat for low mass top-squark, the dominating decay mode is ${\tilde t}_1\rightarrow b \tilde{\chi}_1^{\pm}$ with $\tilde{\chi}_1^{\pm} \rightarrowW^{\pm} \tilde{\chi}_1^0 $. We use three bench mark points with the highestcross sections, which naturally fall within the compressed spectra of the topsquark, and make a phenomenological analysis to determine the optimal eventselection that maximizes the signal significance over backgrounds. We focus onthe leptonic decays of both $W$'s and the decay of lightest Higgs boson intob-quarks ($h_1 \rightarrow b \bar b$). Our results show that the highluminosity LHC will have limitations to observe the studied signal and only aproton collider with higher energy will be able to observe the SUSY scenariostudied with more than three standard deviations over background.

Production of a light top-squark pair in association with a light  non-standard Higgs boson within the NMSSM at the 13 TeV LHC and a 33 TeV  proton collider