Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Stelzl, Stefan"'
We identify a new production channel for QCD axions in supernova environments that contributes to axion emissivity for all models solving the strong CP problem. This channel arises at tree-level from a shift-symmetry-breaking operator constructed at
Externí odkaz:
http://arxiv.org/abs/2410.19902
We present a systematic study of QCD axion production in environments with finite baryon density and temperature, implying significant changes to axion phenomenology. Within heavy baryon chiral perturbation theory, we derive the effective Lagrangian
Externí odkaz:
http://arxiv.org/abs/2410.10945
We study tetraquarks in large $N$ QCD with heavy quarks, in the domain where non-relativistic quantum mechanics offers an adequate approximation. Within the regime of validity of the Born-Oppenheimer approximation, we systematically study and explici
Externí odkaz:
http://arxiv.org/abs/2407.18298
We study how light scalar fields can change the stellar landscape by triggering a new phase of nuclear matter. Scalars coupled to nucleons can develop a non-trivial expectation value at finite baryon density. This sourcing of a scalar reduces the nuc
Externí odkaz:
http://arxiv.org/abs/2307.14418
Autor:
Brandenstein, Chiara, Stelzl, Stefan, Gutsmiedl, Erwin, Schott, Wolfgang, Weiler, Andreas, Fierlinger, Peter
We describe a new table-top electrostatic storage ring concept for $30$ keV polarized ions at frozen spin condition. The device will ultimately be capable of measuring magnetic fields with a resolution of 10$^{-21}$ T with sub-mHz bandwidth. With the
Externí odkaz:
http://arxiv.org/abs/2211.08439
We study the effects of exceptionally light QCD axions on the stellar configuration of white dwarfs. At finite baryon density, the non-derivative coupling of the axion to nucleons displaces the axion from its in-vacuum minimum which implies a reducti
Externí odkaz:
http://arxiv.org/abs/2211.02661
Finite density effects can destabilize the metastable vacua in relaxion models. Focusing on stars as nucleation seeds, we derive the conditions that lead to the formation and runaway of a relaxion bubble of a lower energy minimum than in vacuum. The
Externí odkaz:
http://arxiv.org/abs/2106.11320
We consider matter density effects in theories with a false ground state. Large and dense systems, such as stars, can destabilize a metastable minimum and allow for the formation of bubbles of the true minimum. We derive the conditions under which th
Externí odkaz:
http://arxiv.org/abs/2105.13354
We present an exceptional twin-Higgs model with the minimal symmetry structure for an exact implementation of twin parity along with custodial symmetry. Twin particles are mirrors of the Standard Model yet they carry hypercharge, while the photon is
Externí odkaz:
http://arxiv.org/abs/1905.02203
Publikováno v:
Journal of High Energy Physics; Nov2024, Vol. 2024 Issue 11, p1-42, 42p
