Abstract
New quaternary chalcogenide GexSb40−xS50Te10 and GexSb40−xSe50Te10 (x=20 and 27at%) glasses have been synthesized and studied by neutron and high-energy X-ray diffraction. Both the traditional Fourier transformation technique and the Reverse Monte Carlo (RMC) modeling of the experimental data have been applied to model the 3-dimensional atomic configurations. From the analysis of the partial atomic correlation functions and structure factors the first and second neighbor distances, coordination numbers and bond-angle distributions are calculated. The influence of S(Se) content on the atomic environment in the glassy structure is considered and discussed in a function of glass composition. In addition, the packing density, average atomic volume and compactness for each composition are determined.
Highlights
Long-lived particles (LLPs) feature in a variety of models that have been proposed to address some of the open questions of the Standard Model (SM)
The proper decay lengths of LLPs in Hidden Sector (HS) models are typically unconstrained, aside from a rough upper limit of cτ 108 m given by the cosmological constraint of Big Bang Nucleosynthesis [24], and could be short enough for the LLPs to decay inside the ATLAS detector volume
A search for pair-produced long-lived particles decaying in the ATLAS calorimeter is presented, using data collected during pp collisions at the LHC in 2016, at centre-of-mass energy of 13 TeV
Summary
At the LHC, the CMS experiment has performed searches at centre-of-mass energies of 7, 8 or 13 TeV for neutral LLPs by considering events with either converted photons and missing energy [27, 28], or with lepton [29, 30] or jet pairs [31, 32] originating from displaced vertices in the tracking system. Previous ATLAS searches for neutral LLPs consider events with photons [34], or particles originating from displaced vertices in the tracking system [35, 36]. These selections remove almost all the non-collision background, leaving only multijet background, and maximise signal-to-background ratio in the final search region.
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