Projektbeschreibung
Die Nuancen der starken Wechselwirkungen entwirren
Die starke Kraft ist die stärkste der vier fundamentalen Kräfte oder Wechselwirkungen, die im Standardmodell der Teilchenphysik beschrieben werden. Sie ist nur über sehr kurze Entfernungen wirksam und daher auf der Ebene der subatomaren Teilchen kritisch. Sie ist der Klebstoff, der die Quarks zu Hadronteilchen wie Protonen und Neutronen zusammenhält und sie im Kern hält. Das EU-finanzierte Projekt EXOTIC wird die von den Forschenden erzielten Fortschritte in der Feldtheorie nutzen, um wichtige offene Fragen zu Hadronen, Atomkernen, Hypernuklei und Nukleosynthese im Zusammenhang mit der starken Kraft zu beantworten. Diese Methoden erlauben es, alternative Universen zu untersuchen, in denen die starke Kraft anders wirkt als in der Natur.
Ziel
The least understood part of the so successful Standard Model of the strong and electroweak forces
is the formation of strongly interacting composites, like hadrons, atomic nuclei and hypernuclei. In
addition, the nucleosynthesis in the Big Bang and in stars is fine-tuned at various places, which
immediately leads to the question how much these fine-tunings can be offset to still lead to an habitable
universe?
Over the last decade, the PI and his collaborators have further improved the chiral effective field
theory for two- and three-nucleon forces, have pioneered and refined the extension of this approach to
baryon-baryon interactions and, most importantly, have developed nuclear lattice effective field theory,
which enabled them to solve longstanding problems in nuclear physics, like the ab initio calculation of
the Hoyle state in 12C. Based on these achievements, this proposal will provide answers to: i) where
are the limits of nuclear stability? ii) what hypernuclei can exist, what are their properties and how is
the equation of state of neutron matter modied by the presence of strange quarks?
and iii) what limits on the fundamental parameters of the Standard Model are set by the fine-tunings in
nucleosynthesis in the Big Bang and in stars?
Apart from answering these big science questions, the proposal will, as a by-product, develop methods
in effective field theories and Monte Carlo simulations that will be of use in other fields, such as cold
atom and condensed matter physics.
Wissenschaftliches Gebiet
Programm/Programme
Thema/Themen
Finanzierungsplan
ERC-ADG - Advanced GrantGastgebende Einrichtung
53113 Bonn
Deutschland