Introduction

• Simone Francescato (INFN and Sapienza Università di Roma)

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Getting hotter by heating less: how driven granular materials dissipate energy in excess

• Andrea Plati

Room: Zoom only A fundamental question in systems driven out of thermodynamic equilibrium is how the properties of the Non Equilibrium Stationary States (NESS) are related to the specific mechanisms by which external energy is supplied. In this talk, i will introduce granular materials in the context of non equilibrium statistical mechanics. I will focus on experimental and numerical results about the occurrence of non monotonic energy transfer to a driven dense granular system [1]. This counter intuitive effect can be understood by frictional effects and i will present an analytically solvable model that well reproduces the observed phenomenology, illustrating the role of the competing effects of forcing and dissipation. [1]: Plati et al. Phys. Rev. Research 3, 013011

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Chasing dark matter with ATLAS at the LHC

• Guglielmo Frattari (R)

Room: Zoom only Among open questions in physics, the nature of dark matter is one of the most fascinating and yet far to be solved. Its existence is proven by many experimental observations of the cosmos: if the dark matter has a particle nature it might be produced and measured at particle accelerators. This talk will present a search for dark matter particles in proton-proton collisions measured by the ATLAS experiment at the Large Hadron Collider by looking at events in which a large amount of missing energy is detected in the final states.

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Informal breakout sessions with speakers

• Andrea Plati
• Guglielmo Frattari (R)

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