Project Details
Projekt
Stellar matter: hyperons and axions in neutron stars (M07)
Subject Area
Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
Term
since 2017
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 283604770
Hyperon creation within neutron stars and their impact on the equation of state (EOS) necessitate a precise measurement of the interactions among hyperons and nucleons. Current data points to dominantly attractive interactions and a too soft QCD EOS for neutron stars. Axions are a natural part of QCD and an almost unavoidable solution of the strong CP problem of QCD. We study the impact of a condensed axion on the EOS which can provide a solution to this puzzle. The properties of axions and axion-like particles change in-medium and we reconsider astrophysical limits and the viability of relaxion models.
DFG Programme
Collaborative Research Centres
Applicant Institution
Technische Universität München (TUM)
Project Heads
Professorin Dr. Laura Fabbietti; Professor Dr. Andreas Weiler, since 7/2021
