時間：3月20日(四) 10：30   / Time:  10h30 Thursday the 20th of March 2025

題目：Nonrelativistic multiscale systems with Effective Field Theories

講者：Prof. Nora Brambilla

服務單位：Technical University Munich, Germany

地點：本校科學三館4樓 SC427會議室 / Venue:  SC427, Science Building 3, NYCU

摘要：
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 colloquium, 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.