## 4D Seminar — Itay Bloch (UC Berkeley/LBL) “Millicharged DM Distribution: From Galaxy formation to Underground Experiments”

Abstract: As requested, I’ll start my talk with a “brief” introduction to myself, and my past and current research interests, and then transition to focusing on one specific project about millicharged DM. The abstract for that second part is: The possibility of having DM (or a fraction of it) charged under a dark U(1) which mixes with the U(1)EM has … Read More

## Christian Bauer (LBNL) “Quantum Simulation of Effective Field Theories”

I will review the recent results on using quantum algorithms to understand fundamental properties in High Energy Physics. The goal of this work is to allow the calculation of important properties of the Standard Model non-perturbatively and ultimately to simulate scattering at colliders from first principles. I will show that by simulating matrix elements of effective theories one maximizes the … Read More

## Stefano Di Noi (Padua) “Phenomenological aspects of the SMEFT in Higgs physics”

Abstract: The absence of direct evidence of new particles at energies \mathcal{O} ( 1\, \textrm{TeV} ) allows us to parametrize effects of possible heavy new physics (lying beyond the reach of the LHC for direct production) with an effective field theory, known as the Standard Model Effective Field Theory (SMEFT). After a brief introduction to the SMEFT, I will discuss the importance of renormalization group … Read More

## String Math: Spencer Tamagni (UC Berkeley) “Stable Envelopes for Vortex Moduli Spaces “

Abstract: Stable envelopes are correspondences useful for constructing geometric action of quantum groups and solutions to quantum Knizhnik-Zamolodchikov (qKZ) equations. I will review basic aspects of this and explain the construction in a novel class of examples consisting of certain vortex (also known as quasimap) moduli spaces. The main technical result is that K-theoretic curve counts in these varieties are controlled … Read More

## Alessandro Valenti (Padua) “Grand Color Axion”

Abstract: The apparently simple and elegant QCD axion solution to the Strong CP problem is well known to be affected by the so called “quality problem”, whose root lies in the smallness of the QCD-induced axion potential with respect to UV-suppressed operators explicitly breaking the PQ symmetry. In this seminar I will present a model which addresses this issue by … Read More

## Temple He (Caltech) “On Entropy Growth in Perturbative Scattering”

Abstract: Inspired by the second law of thermodynamics, we study the change in subsystem entropy generated by dynamical unitary evolution of a product state in a bipartite system. Working at leading order in perturbative interactions, we prove that the quantum n-Tsallis entropy of a subsystem never decreases provided that subsystem is initialized as a statistical mixture of states of equal … Read More