Felipe Silva | Searcharxiv

arXiv2025

Resistive Plate Chambers and Gaseous Detector Activities in the Brazilian High Energy Physics Community

This document presents an overview of the activities of Brazilian groups on gaseous detectors, with emphasis on resistive plate chambers (RPCs) for the CMS experiment at the CERN LHC and related applications. It summarises the design, performance, maintenance and upgrade of the CMS RPC system, including the installation of improved RPCs for the HL-LHC era and the development of alternative, lower-GWP gas mixtures. It also describes local laboratory infrastructures in Brazil for RPC assembly, testing and gas studies, as well as spin-off projects such as the MARTA cosmic-ray detector and applications in medical imaging and muography. It is intended as a living reference to be periodically updated, documenting the contributions of the Brazilian community to RPC technology and its applications.

hep-ex↗

arXiv2024

Entropy for compact operators and results on entropy and specification

We investigate the topological entropy of operators. More precisely, in the Banach space setting, we show that compact operators have finite entropy, which depends solely on their point spectrum. Moreover, for operators on \(F\)-spaces, we explore the relationship between the specification property and entropy. In particular, we show that the specification property implies infinite topological entropy, while the operator specification property implies positive entropy. We also show that the invariance principle fails for the class of compact operators.

math.DS↗