Nuclear Theory Seminar

Thu, Sep 21, 2023 2:00 pm - 3:00 pm
PSC 3150


Speaker:  Nora Brambilla, Technical University of Munich

      Title: Nonrelativistic bound states with Effective Field Theories

       Abstract: Nonrelativistic bound states lie at the core of quantum physics,
       permeating the fabric of nature across diverse realms, spanning particle
       to nuclear physics, and from condensed matter to astrophysics. These
       systems are pivotal in addressing contemporary challenges at the forefront
       of particle physics. Characterized by distinct energy scales, they serve
       as unique probes of complex environments. Historically, their
       incorporation into quantum field theory was fraught with difficulty until
       the emergence of nonrelativistic effective field theories (NREFTs).

       In this talk, we delve into the construction of a potential NREFT
       (pNREFT), a framework that directly tackles bound state dynamics
       reimagining quantum mechanics from field theory.
       Focusing on heavy quarkonia, pNRQCD facilitates systematic definitions and
       precise calculations for high-energy collider observables. At the cutting
       edge, we investigate nonrelativistic bound states in intricate
       environments, like the newly discovered exotics X, Y, Z  above the strong
       decay threshold and the behavior in out-of-equilibrium scenarios, such as
       quarkonium suppression in a Quark Gluon Plasma or dark matter interactions
       in the early universe.

       Our ability to achieve precision calculations and control strongly
       interacting systems is closely linked to bridging perturbative methods
       with nonperturbative tools, notably numerical lattice gauge theories.