• Energy Research
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Abstract A search for a chargino-neutralino pair decaying via the 125 GeV Higgs boson into photons is presented. The study is based on the data collected between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb−1 of pp collisions at a centre-of-mass energy of 13 TeV. No significant excess over the expected background is observed. Upper limits at 95% confidence level for a massless $$ {\tilde{\chi}}_1^0 $$ χ ˜ 1 0 are set on several electroweakino production cross-sections and the visible cross-section for beyond the Standard Model processes. In the context of simplified supersymmetric models, 95% confidence-level limits of up to 310 GeV in $$ m\left({\tilde{\chi}}_1^{\pm }/{\tilde{\chi}}_2^0\right) $$ m χ ˜ 1 ± / χ ˜ 2 0 , where $$ m\left({\tilde{\chi}}_1^0\right) $$ m χ ˜ 1 0 = 0.5 GeV, are set. Limits at 95% confidence level are also set on the $$ {\tilde{\chi}}_1^{\pm }{\tilde{\chi}}_2^0 $$ χ ˜ 1 ± χ ˜ 2 0 cross-section in the mass plane of $$ m\left({\tilde{\chi}}_1^{\pm }/{\tilde{\chi}}_2^0\right) $$ m χ ˜ 1 ± / χ ˜ 2 0 and $$ m\left({\tilde{\chi}}_1^0\right) $$ m χ ˜ 1 0 , and on scenarios with gravitino as the lightest supersymmetric particle. Upper limits at the 95% confidence-level are set on the higgsino production cross-section. Higgsino masses below 380 GeV are excluded for the case of the higgsino fully decaying into a Higgs boson and a gravitino.

Abstract Producing electricity from a renewable source is a major challenge in Morocco nowadays and high concentrated photovoltaic (HCPV) is becoming an attractive solution to ensure clean energy generation due to its high efficiency. The aim of this paper is to estimate the « Energetic, economic, and environmental » performances of large scale HCPV power plants in the major Moroccan climatic zones and to compare their feasibility to PV plants. The mathematical model for estimating the energetic, economic, and environmental performances of large scale HCPV plants is shown, sensitivity and comparison analysis are exhibited. Another goal of the paper is the optimization of the performances of the algorithm through the study of the effect of different parameters. Our major finding is that the large scale HCPV plants are more competitive than PV plants in Errachidia climatic zone where the (capacity factor, LCOE) take the values (26.07%,8.57c$/kWh). Moreover, the capacity factor of large scale HCPV power plants is the most sensitive to the temperature coefficient while the (LCOEnominal, LCOEreal, NPV) are the most sensitive to the analysis period. The quantity of CO2 mitigated reaches a maximal value in the Errachidia zone with 2.59 × 105 tons of carbon per year avoided, and the cost of carbon gained there is estimated to be 10.4 M$. Innovative GIS maps of energetic, economic, and environmental performances of large scale HCPV power plants for all Morocco are given.