Short description:

The proceedings of HEP 2023 - 40th Conference on Recent Developments in High Energy Physics and Cosmology invites scholars and experts in the fields of High Energy Physics, involved both in experimental and theoretical research, from various universities and institutions. The conference focuses on the more recent advancements in topics such as 'LHC experimental results', 'Astroparticle Physics', 'Cosmology', 'String Theory', 'Dark Matter' and others. The main goal of the conference is to present the related research work of the Greek scientific community, to promote the cooperation of experts and scholars in the field, to share the research achievements both on a national and international level. All accepted speakers were eligible to contribute to the Conference Proceedings on a voluntary basis.

The HEP2023 Conference is organized by the Hellenic Society for the Study of High Energy Physics and is hosted by the University of Ioannina (5-7 April 2023).

Long description:

The proceedings of HEP 2023 - 40th Conference on Recent Developments in High Energy Physics and Cosmology invites scholars and experts in the fields of High Energy Physics, involved both in experimental and theoretical research, from various universities and institutions. The conference focuses on the more recent advancements in topics such as 'LHC experimental results', 'Astroparticle Physics', 'Cosmology', 'String Theory', 'Dark Matter' and others. The main goal of the conference is to present the related research work of the Greek scientific community, to promote the cooperation of experts and scholars in the field, to share the research achievements both on a national and international level. All accepted speakers were eligible to contribute to the Conference Proceedings on a voluntary basis.

The HEP2023 Conference is organized by the Hellenic Society for the Study of High Energy Physics and is hosted by the University of Ioannina (5-7 April 2023).

Table of Contents:

Black Hole Solutions in Chern Simons Gravity with Axion-Hair.- Aspects of Thermal Stability for Black Holes.- Normal and Phantom Black Holes in  Scalar Tensor Theories.- String inspired running vacuum cosmology, quantum corrections and the current cosmological tensions.- Higher order corrections at the LHC: current status and prospects.- A Field Theory Approach to Dark Energy and its Observational Implications.- T Model Higgs Inflation in Supergravity.- Searches for Supersymmetry using the full CMS Run II data set.- Dimension 8 EFT interpretation for the EWK production of ZZjj in the four lepton channel.- Anomalies in effective theories, anomalous couplings and the g  2 of the muon.- Observable Primordial Gravitational Waves from Cosmic Inflation.- Modules and Assembly Status of the CMS HGCAL.- Dedicated experiments for feebly interacting particles at the LHC.- The microNet (?Net) project: An Extended Outreach Program for Astroparticle Physics.- Simulations studies for the RF performance of the Astroneu II Array.- Ultraviolet  Freeze in Baryogenesis Scenarios.- Higgs vacuum metastability in $R+R^2$ gravity.- Search for New Particles at CERN on the Zooniverse citizen science platform.- Multijet cross sections and ratios in pp collisions at sqrt(s)=13 TeV with CMS.- Multi differential measurement of the dijet cross section in proton-proton collisions at sqrt(s) = 13 TeV with CMS.- ATLAS Highlights.- Cosmic Inflation in Metric Affine Gravity.- Dark matter search with CAST and beyond CAST.- Recent Physics Results from CMS.