A5081567851- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Quantum Electrodynamics and Casimir Effect
- Physics of Superconductivity and Magnetism
- Noncommutative and Quantum Gravity Theories
- Quantum, superfluid, helium dynamics
- Theoretical and Computational Physics
- Solar and Space Plasma Dynamics
- Relativity and Gravitational Theory
- Astronomy and Astrophysical Research
- Computational Physics and Python Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum and electron transport phenomena
- Superconducting Materials and Applications
- High-pressure geophysics and materials
- Scientific Research and Discoveries
- Radioactive Decay and Measurement Techniques
- Topological Materials and Phenomena
University of British Columbia
2016-2025
Johannes Gutenberg University Mainz
2020
University of California, Berkeley
2020
Helmholtz Institute Mainz
2020
University of Freiburg
2018
Isaac Newton Institute for Mathematical Sciences
1998
Budker Institute of Nuclear Physics
1997
University of British Columbia Hospital
1996
Southern Methodist University
1994-1995
European Organization for Nuclear Research
1990-1993
Recently an effective Lagrangian for the interactions of photons, Nambu-Goldstone bosons and superfluid phonons in dense quark matter has been derived using anomaly matching arguments. In this paper we illuminate nature certain anomalous terms by explicit microscopic calculation. We also generalize corresponding construction to introduce axion field. derive describing axions with photons background. This Lagrangian, among other things, implies that current will be induced presence magnetic...
It has been recently argued that numerous enigmatic observations remain challenging to explain within the framework of conventional physics. These anomalies include unexpected correlations between temperature variations in stratosphere, total electron content Earth’s atmosphere, and earthquake activity on one hand positions planets other. Decades collected data provide statistically significant evidence for these observed correlations. works suggest arise from strongly interacting “streaming...
We consider the effects of quantum anomalies involving baryon current for high-density matter. In effective Lagrangian, anomaly terms describe interaction three light fields: electromagnetic photons ${A}_{\ensuremath{\mu}}$, neutral Nambu-Goldstone bosons ($\ensuremath{\pi}$, $\ensuremath{\eta}$, ${\ensuremath{\eta}}^{\ensuremath{'}}$), and superfluid phonon. The induced interactions lead to a number interesting phenomena which may have phenomenological consequences observable in neutron stars.
We suggest that the solution to cosmological vacuum energy puzzle is linked infrared sector of effective theory gravity interacting with standard model fields, QCD fields specifically. work in framework low quantum as an field theory. In particular, we compute terms parameters and Hubble constant $H$ such $\epsilon_{vac} \sim H \cdot m_q\la\bar{q}q\ra /m_{\eta'} (3.6\cdot 10^{-3} \text{eV})^4$, which amazingly close observed value today. The ghost (responsible for $U(1)_A$ problem) plays a...
We suggest that the solution to cosmological vacuum energy puzzle is linked infrared sector of effective theory gravity interacting with standard model fields. propose a specific solvable two dimensional where our proposal can be explicitly tested. analyze 2d Schwinger on 2-torus and in curved space, mostly exploiting properties its topological susceptibility, links nontrivial topology or deviations from spacetime flatness, relations real 4d world. The Kogut-Susskind ghost (which direct...
The origin of the observed dark energy could be explained entirely within standard model, with no new fields required. We show how low-energy sector chiral QCD Lagrangian, once embedded in a non-trivial spacetime, gives rise to cosmological vacuum density which can presented terms parameters and Hubble constant $H$ as $\rho_\Lambda \simeq H \cdot m_q\la\bar{q}q\ra /m_{\eta'} \sim (4.3\cdot 10^{-3} \text{eV})^4$. In this work we focus on dynamics ghost that are essential ingredients...
The effects of anomalies in high density QCD are striking. We consider a direct application one these effects, namely topological currents, on the physics neutron stars. All elements required for currents present stars: degenerate matter, large magnetic fields, and P-parity violating processes. These conditions lead to creation vector capable carrying momentum inducing fields. estimate size many representative states dense matter star argue that they could be responsible proper motion stars...
We study a testable dark matter (DM) model outside of the standard WIMP paradigm in which observed ratio $\Omega_{\rm dark} \simeq \Omega_{\rm visible}$ for visible and densities finds its natural explanation as result their common QCD origin when both types (DM visible) are formed at phase transition proportional to $\Lambda_{\rm QCD}$. Instead conventional "baryogenesis" mechanism we advocate is actually charge separation process always occur presence $\cal{CP}$ odd axion field $a(x)$. In...
We consider the formation and evolution of axion quark nugget (AQN) dark matter particles in early Universe. The goal this work is to estimate mass distribution these objects assess their ability form survive present day. argue that model allows a broad range parameter space which AQN may account for observed density, naturally explains similarity between ``dark'' ``visible'' components, i.e.,...
We suggest that the solution to cosmological vacuum energy puzzle does not require any new field beyond standard model, but rather can be explained as a result of interaction infrared sector effective theory gravity with model fields. The constant in this framework presented terms QCD parameters and Hubble $H$ follows, $\epsilon_{vac} \sim H \cdot m_q\la\bar{q}q\ra /m_{\eta'} (4.3\cdot 10^{-3} \text{eV})^4$, which is amazingly close observed value today. In work we explain how proposal...
We study a number of different ingredients related to $\theta$ dependence, the non-dispersive contribution in topological susceptibility with "wrong" sign, sectors gauge theories, and subjects using simple "deformed QCD". This model is weakly coupled theory, which however has all relevant essential elements allowing us difficult nontrivial questions are known be present real strongly QCD. Essentially we want test ideas $U(1)_A$ problem theoretically controllable manner QCD" as toy model. One...
In this work we study the well known contact term, which is key element in resolving so-called $U(1)_A$ problem QCD. We term using dual Holographic Description. argue that picture saturated by D2 branes can be interpreted as tunnelling events Minkowski space-time. quote a number of direct lattice results supporting identification. also receives Casimir -like correction $\sim (\Lqcd R)^{-1}$ rather than naively expected $\exp(-\Lqcd R)$ when space-time ${\cal R}_{3,1}$ replaced large but...
We review a testable, the axion quark nugget (AQN) model outside of standard WIMP paradigm. The was originally invented to explain observed similarity between dark and visible components, $Ω_{\rm DM}\approx Ω_{\rm visible}$ in natural way as both types matter are formed during same QCD transition proportional dimensional fundamental parameter system, $Λ_{\rm QCD}$. In this framework baryogenesis is actually charge segregation (rather than generation) process which operational due...
Celestial observations often exhibit inexplicable planetary dependencies when the timing of an observable is projected onto heliocentric positions. This possible only for incident, non-relativistic streams. Notably, celebrated dark matter (DM) in Universe can form streams our vicinity with speeds about 240 km/s. Since gravitational impact scales $1/(\text{velocity})^2$, all solar system objects, including Sun and Moon, act as strong lenses, their focal planes located within system. Even Moon...
Ball lighting (BL) has been observed for centuries. There are large number of books, review articles, and original scientific papers devoted to different aspects BL phenomenon. Yet, the basic features this phenomenon have never explained by known physics. The main problem is source which could power dynamics BL. We advocate an idea that dark matter in form axion quark nuggets (AQN) made standard model quarks gluons (similar old Witten's strangelets) internally generate required power....
We propose a novel scenario to explain the observed cosmological asymmetry between matter and antimatter, based on nonperturbative QCD physics. This relies mechanism of separation quarks antiquarks in two coexisting phases at end phase transition: ordinary hadrons (and antihadrons), along with massive lumps antilumps) color superconducting phase. The latter would serve as cold dark matter. In certain conditions charge is $C$ $CP$ asymmetric can leave net excess over antihadrons conventional...
We discuss the possibility that recent detection of 511 keV $\ensuremath{\gamma}$ rays from galactic bulge, as observed by International Gamma-Ray Astrophysics Laboratory, can be naturally explained supermassive very dense droplets (strangelets) dark matter. These are assumed to made ordinary light quarks (or antiquarks) condensed in a nonhadronic color superconducting phase. The carry electrons positrons) bulk or/and on surface. ${e}^{+}{e}^{\ensuremath{-}}$ annihilation events take place...
Dark matter (DM) being the vital ingredient in cosmos, still remains a mystery. The standard assumption is that collisionless cold dark (CCDM) particles are represented by some weakly interacting fundamental fields which cannot be associated with any quarks or leptons. However, recent analyses of structure on galactic and subgalactic scales have suggested discrepancies stimulated numerous alternative proposals including, e.g. self-interacting matter, self-annihilating decaying to name just...