We study the effects of exceptionally light QCD axions on stellar configuration white dwarfs. At finite baryon density, nonderivative coupling axion to nucleons displaces from its in-vacuum minimum, which implies a reduction nucleon mass. This dramatically alters composition remnants. In particular, modifications mass-radius relationship dwarfs allow us probe large regions unexplored parameter space without requiring that are dark matter. Published by American Physical Society 2024

A bstract We present a systematic study of QCD axion production in environments with finite baryon density and temperature, implying significant changes to phenomenology. Within heavy chiral perturbation theory, we derive the effective Lagrangian describing interactions nucleons mesons up next-to-leading-order expansion. focus on corrections axion-nucleon couplings from higher orders density. These are modified by an order magnitude near nuclear saturation density, significantly impacting...

We consider matter density effects in theories with a false ground state. Large and dense systems, such as stars, can destabilize metastable minimum allow for the formation of bubbles true minimum. derive conditions under which these form, well they either remain confined to region or escape infinity. The latter case leads phase transition universe at star formation. explore phenomenological consequences seeded transitions.

A bstract We study how light scalar fields can change the stellar landscape by triggering a new phase of nuclear matter. Scalars coupled to nucleons develop non-trivial expectation value at finite baryon density. This sourcing reduces nucleon mass and provides an additional energy density pressure source. Under generic conditions, ground state matter emerges, with striking implications for configuration remnants. Notably, neutron stars in be significantly heavier than QCD equations currently...

Finite density effects can destabilize the metastable vacua in relaxion models. Focusing on stars as nucleation seeds, we derive conditions that lead to formation and runaway of a bubble lower energy minimum than vacuum. The resulting late-time phase transition universe allows us set new constraints parameter space We also find similar instabilities be triggered by large electromagnetic fields around rotating neutron stars.

We describe a new table-top electrostatic storage ring concept for 30 keV polarized ions with fixed spin orientation. The device will ultimately be capable of measuring magnetic fields resolution 10 −20 T sub-mHz bandwidth. With the possibility to store different kinds or ionic molecules and access prepare probe states systems using lasers SQUIDs, it can used search electric dipole moments (EDMs) electrons nucleons, as well axion-like particle dark matter photon matter. Its sensitivity...

A bstract We present an exceptional twin-Higgs model with the minimal symmetry structure for exact implementation of twin parity along custodial symmetry. Twin particles are mirrors Standard Model yet they carry hypercharge, while photon is identified its twin. thoroughly explore phenomenological signatures hypercharged naturalness: long-lived charged particles; a colorless top electric charge 2 / 3 that once pair-produced, bounds via twin-color interactions and can annihilate to dileptons...

We identify a new production channel for QCD axions in supernova environments that contributes to axion emissivity all models solving the strong CP problem. This arises at tree-level from shift-symmetry-breaking operator constructed next-to-leading order Chiral Perturbation Theory. In scenarios where model-dependent derivative couplings nucleons are absent, this sets strongest model-independent constraint on mass, improving existing bounds by two orders of magnitude.

We study how light scalar fields can change the stellar landscape by triggering a new phase of nuclear matter. Scalars coupled to nucleons develop non-trivial expectation value at finite baryon density. This sourcing reduces nucleon mass and provides an additional energy density pressure source. Under generic conditions, ground state matter emerges, with striking implications for configuration remnants. Notably, neutron stars in be significantly heavier than QCD equations currently predict....

We study the effects of light QCD axions on stellar configuration white dwarfs. At finite baryon density, non-derivative coupling axion to nucleons displaces from its in-vacuum minimum which implies a reduction nucleon mass. This dramatically alters composition remnants. In particular, modifications mass-radius relationship dwarfs allow us probe large regions unexplored parameter space without requiring it be significant fraction dark matter.

We present a systematic study of QCD axion production in environments with finite baryon density and temperature, implying significant changes to phenomenology. Within heavy chiral perturbation theory, we derive the effective Lagrangian describing interactions nucleons mesons up next-to-leading-order expansion. focus on corrections axion-nucleon couplings from higher orders density. These are modified by an order magnitude near nuclear saturation density, significantly impacting supernovae...

A bstract We study tetraquarks in large N QCD with heavy quarks, the domain where non-relativistic quantum mechanics offers an adequate approximation. Within regime of validity Born-Oppenheimer approximation, we systematically and explicitly construct tetraquark states. At leading order 1/ expansion, bound spectrum consists free mesons, while corrections give rise to a potential that can bind mesons into tetraquarks. find two different types tetraquarks, each endowed distinct color-spatial...

Wirbelstrom-Wegsensoren vereinen mehrere Vorteile. Sie messen verschleißfrei und berührungslos mit hoher Präzision Auflösung. zeigen sich unempfindlich gegenüber äußeren Einflüssen, wie Schmutz, Druck oder schwankenden Temperaturen sind daher geradezu ideale Partner in rauen Industrieumgebungen.

Sensoren für geometrische Größen sind in vielen Bereichen des Maschinen- und Anlagenbaus unverzichtbar. Die Erfassung von Wegen, Positionen oder Abständen gehört zu den am häufigsten gemessenen der industriellen Messtechnik. Ein spezieller Typ induktiven Wegsensoren, auf Induktion Wirbelströmen basiert, erreicht sehr hohe Genauigkeit ist weitgehend unempfindlich gegenüber äußeren Einflüssen.

Hersteller von Aluminium-Druckgussteilen sparen durch den Einsatz Maschinen mit induktiven Sensoren bares Geld. Die wirbelstrombasierten überwachen die Werkzeugatmung hoher Genauigkeit. Bei der handelt es sich um schmalen Spalt, zwischen Werkzeughälften entsteht, wenn Material unter Druck eingeschossen wird. Sie ist eine qualitätsentscheidende Größe im Druckgussprozess. Dank Überwachung können ein frühzeitiger Werkzeugverschleiß oder falsche Prozessparameter erkannt werden. Langwierige und...

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 resolution 10$^{-21}$ T sub-mHz bandwidth. With the possibility to store different kinds or ionic molecules and access prepare probe states systems using lasers SQUIDs, it can used search electric dipole moments (EDMs) electrons nucleons, as well axion-like particle dark matter photon matter. Its...

We consider matter density effects in theories with a false ground state. Large and dense systems, such as stars, can destabilize metastable minimum allow for the formation of bubbles true minimum. derive conditions under which these form, well they either remain confined to region or escape infinity. The latter case leads phase transition universe at star formation. explore phenomenological consequences seeded transitions.