Monday May 20th, 2024 at 11am
Fractal Structures and Tsallis Statistics in High-Energy and Hadron Physics
Airton Deppman (Institute of Physics, University of Sao Paolo, Brazil)
This talk provides an in-depth analysis of the emergence of Tsallis Statistics through fractal structures in high-energy collisions in the context of high-energy physics and hadron physics. The self-similarity in the parton structure resulting from the scale properties of the Callan-Symanzik Equation is examined, demonstrating the recursive relations that allow for the emergence of Tsallis distributions. The implications of these results, including the relation between the Tsallis parameter q and the number of colours and flavours, are discussed in detail.
The talk discusses the potential of the same theoretical approach for the study of hadron structure, in view of the z-scaling connections with the Tsallis distributions and with thermofractal structure. This comprehensive analysis provides valuable insights into the intricate relationship between fractal structures, Tsallis Statistics, and non-local correlations in high-energy collisions, highlighting their significance for the field of high-energy physics and hadron physics.
Monday May 6th, 2024 at 11am
The QCD Running Coupling
Alexandre Deur (JLAB)
We will discuss the QCD running coupling, αs, starting from its definition and meaning in the QCD's perturbative domain. We will then show how the definition of αs can be extended into the non-perturbative domain. Such extension is not unique and we will focus on the extension based on the concept of effective charges. This particular extension is especially useful as it permits us to measure αs in the non-perturbative domain. We will describe the measurement and its result. Furthermore, such effective charge can be computed using the AdS/CFT correspondence. We will briefly describe the calculation and then compare its result to the measurements and to other non-perturbative determinations of αs.
Monday February 5th, 2024 at 11am
DEI in Physics & STEM
Raúl Briceño (UC Berkely, LBNL)
Issues related to Diversity, Equity and Inclusion (DEI) in Physics and STEM overall have received an increasing amount of attention. Unlike most problems that we have been trained to solve as physicists, those associated with DEI are multi-variabled, making them much harder to understand and consequently to solve. In this talk, I will try to discuss the sticky issues of DEI from a physicist’s point of view. I give a summary of my current understanding of what are some of the key problems, I share my thoughts on what may be some of their roots, and I give some tips, as to how to help while minimizing possible arguments. Finally, I give examples of outreach efforts that I have found to be particularly helpful in reducing overall barriers of entry into STEM.