In dark sector models involving a new confining force that binds a set of dark quarks into dark hadrons, dark sector quarks could be produced at the LHC, where they undergo a dark parton shower, generating jets of dark hadrons that ultimately decay back to Standard Model hadrons. This yields collider objects that can be nearly indistinguishable from Standard Model … Read More
Abstract: Using a heavy mass expansion we build an EFT for nonrelativistic DM of any spin, coupling to quarks, gluons and photons. We find the relations imposed by the reparametrization invariance, and provide the matching onto the interaction basis of nonrelativistic DM interacting with norelativistic nucleons (NRET). The construction retains the attractive features of the NRET approach, i.e. it works … Read More
Abstract: Today’s lattice QCD program, developed over decades, provides celebrated quantitative insight into nonperturbative physics, for example, via ab initio hadron spectroscopy. The entire computational framework, however, is based on importance sampling of the imaginary-time path integral—a method that is infected by sign problems for various calculations of interest. By contrast, it turns out that imaginary time and path integrals are … Read More
Abstract: In the first half of my talk, I will present a way to parametrize new sources of CP violation in the Standard Model EFT (SMEFT) using flavor invariants. New sources of CP violation can feed into the QCD theta angle, jeopardizing solutions to the strong CP problem such as the axion. By means of an instanton calculation, I will … Read More
Abstract: We discuss joint work with Tom Gannon, showing that the algebra $D(SL_n/U)$ of differential operators on the base affine space of $SL_n$ is the quantized Coulomb branch of a certain 3d $\mathcal{N} = 4$ quiver gauge theory. In the semiclassical limit this confirms a conjecture of Dancer-Hanany-Kirwan on the universal hyperk\”ahler implosion of $SL_n$. In fact, we prove a … Read More
Abstract: The direct observation of gravitational waves provides a powerful new lens with which to explore the cosmos. In this talk, I will share recent observational developments illustrating how these measurements can be used to not only give tantalising clues into our early Universe, but also pin down new physics far beyond reach of laboratory experiments. One particularly fruitful avenue, … Read More
Lattice QCD has enabled the non-perturbative calculation of many static quantities such as hadron masses and form factors. Quantum computers are expected to enable lattice calculations to directly probe the real time dynamics of quantum field theories. In this talk, I will review the motivation for quantum simulation and the formulations of lattice gauge theories that have been explored for quantum simulation. I … Read More
Abstract:Thousands of person years have been invested in searches for New Physics (NP), the majority of them motivated by theoretical considerations. Yet, no evidence of beyond the Standard Model (BSM) physics has been found. This suggests that model-agnostic searches might be the key to explore NP, and help discover unexpected phenomena which can inspire future theoretical developments. A possible strategy … Read More
Abstract: We study closed cosmologies in simples models of two dimensional gravity. We show that there are stark contrast as well as connections between semi-classical and non-perturbative aspects of the theory of closed universes.
Abstract: The top-down matching of specific scenarios for new physics onto the Standard Model Effective Field Theory (SMEFT) is well-understood and easy to automise. The inverse approach, however, the bottom-up matching of the SMEFT to UV models and in particular a systematic exploration of these discoverable UV models is more difficult. I will present a diagrammatic technique for the automated … Read More