A bstract Top-squarks (stops) play a crucial role for the naturalness of supersymmetry (SUSY). However, searching stops is tough task at LHC. To dig out huge LHC data, various expert-constructed kinematic variables or cutting-edge analysis techniques have been invented. In this paper, we propose to represent collision events as event graphs and use message passing neutral network (MPNN) analyze events. As proof-of-concept, our method in search stop pair production LHC, find that MPNN can...

A bstract Given that the LHC experiment has produced strong constraints on colored supersymmetric particles (sparticles), testing electroweak supersymmetry (EWSUSY) will be next crucial task at LHC. On other hand, light electroweakinos and sleptons in EWSUSY can also contribute to dark matter (DM) low energy lepton observables. The precision measurements of them provide indirect evidence SUSY. In this work, we confront with muon g − 2 anomaly, DM relic density, direct detection limits latest...

Deep learning, a branch of machine have been recently applied to high energy experimental and phenomenological studies. In this note we give brief review on those applications using supervised deep learning. We first describe various learning models then recapitulate their Some detailed are delineated in details, including the scan analysis new physics parameter space, graph neural networks search top-squark production $CP$ measurement top-Higgs coupling at LHC.

Given the recent progress in dark matter direction detection experiments, we examine a light bino–higgsino (DM) scenario ( $$M_1<100$$ GeV and $$\mu <300$$ GeV) natural supersymmetry with electroweak fine tuning measure $$\Delta _\mathrm{EW}<30$$ . By imposing various constraints, note that: (i) For $$\mathrm{sign}(\mu /M_1)=+1$$ , parameter space allowed by DM relic density collider bounds can almost be excluded very spin-independent (SI) scattering cross-section limits from XENON1T (2017)...

Measuring the triple Higgs boson coupling is a crucial task in LHC and future collider experiments. We apply message passing neural network (MPNN) to study of nonresonant pair production process $pp\ensuremath{\rightarrow}hh$ final state with $2b+2\ensuremath{\ell}+{E}_{\mathrm{T}}^{\mathrm{miss}}$ at LHC. Although MPNN can improve signal significance, it still challenging observe such find that $2\ensuremath{\sigma}$ upper bound (including 10% systematic uncertainty) on cross section 3.7...

Two experiments from the Fermilab, E989 and CDF II, have reported two anomalies for muon $g-2$ $W$-boson mass that may indicate new physics at low energy scale. Here we examine possibility of a common origin these in Next-to-Minimal Supersymmetric Standard Model. Considering various experimental astrophysical constraints such as Higgs mass, collider data, flavor physics, dark matter relic density, direct detection experiments, find lighter electroweakinos sleptons can generate sufficient...

Abstract In the supersymmetric models, coannihilation of neutralino DM with a lighter particle provides feasible way to accommodate observed cosmological relic density. Such mechanism predicts compressed spectrum and its coannihilating partner, which results in soft final states makes searches for sparticles challenging at colliders. On other hand, abundance freeze-out usually increases as mass becomes heavier. This implies an upper bound on DM. Given these observations, we explore HE-LHC...

The Galactic center gamma-ray excess (GCE) is a long-standing unsolved problem. One of candidate solutions, the dark matter (DM) annihilation, has been recently tested with other astrophysical observations, such as AMS-02 electron-positron spectra, Fermi Dwarf spheroidal galaxies data, and so on. By assuming that DM particles annihilate purely into normal charged fermion pair, Di Mauro Winkle (2021) claimed only muon-pair compatible null detection all corresponding measurements can explain...

We study the decay of $B^+$ meson into $K^+$ plus a light mediator $\phi$ followed by production dark matter (DM) pair $\bar \chi \chi$, which can mimic flavor changing neural current (FCNC) process $B^+ \rightarrow K^+ \nu \bar \nu$ in standard model (SM). Constraints from DM relic density, direct detection, collider and $B-$physics data combined with recently reported $B^+\rightarrow branching ratio performed at Belle II experiment, we analyse couplings between SM fermions as well...

The existence of a light mediator is beneficial to some phenomena in astroparticle physics, such as the core-cusp problem and diversity problem. It can decouple from Standard Model avoid direct detection constraints, generally realized by retard decay mediator. Their out-of-equilibrium process changes dark matter (DM) freeze-out via temperature discrepancy. This type hidden sector (HS) typically requires precision calculation considering HS evolution thermal average cross-section. If...

We study the decay of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>B</a:mi><a:mo>+</a:mo></a:msup></a:math> meson into <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>K</c:mi><c:mo>+</c:mo></c:msup></c:math> plus a light mediator <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>ϕ</e:mi></e:math>, which subsequently decays dark matter pair, <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"...

We present a model that extends the standard by incorporating simplest discrete symmetry groups, $Z_2$ and $Z_3$. This introduces vector-like leptons real scalar singlet. Based on this framework, we generate Dirac neutrino masses explain normal mass ordering. The also aligns well with current oscillation data regarding theoretical values of leptonic mixing angles CP-violating phase. Furthermore, it predicts atmospheric angle falls in higher octant proposes viable dark matter candidate....

In the minimal supersymmetric standard model (MSSM) lightest superparticle (LSP) can be a TeV neutralino (mainly dominated by higgsino or wino) which serves as dark matter candidate with correct thermal relic density. this work we confront 1–3 latest direct and indirect detections from PandaX AMS-02/DAMPE. Considering various scenarios decoupled sfermions, A-mediated annihilation, squark stop coannihilation, find that parameter space is stringently constrained detection limits. allowed...

The Galactic center gamma-ray excess (GCE) is a long-standing unsolved problem. One of candidate solutions, the dark matter (DM) annihilation, has been recently tested with other astrophysical observations, such as AMS-02 electron-positron spectra, Fermi Dwarf spheroidal galaxies data, and so on. By assuming that DM particles annihilate purely into normal charged fermion pair, Di Mauro Winkle (2021) claimed only muon-pair compatible null detection all corresponding measurements can explain...