Georg Raffelt - Academia.edu (original) (raw)

Papers by Georg Raffelt

Nuclear Physics B - Proceedings Supplements, 1999

Dark Matter in Astro- and Particle Physics, 2001

New Astronomy Reviews, 2002

Annual Review of Nuclear and Particle Science, 1999

▪ Low-mass particles, such as neutrinos, axions, other Nambu-Goldstone bosons, and gravitons, a... more ▪ Low-mass particles, such as neutrinos, axions, other Nambu-Goldstone bosons, and gravitons, are produced in the hot and dense interior of stars. Therefore, astrophysical arguments constrain the properties of these particles in ways that are often complementary to cosmological arguments and to laboratory experiments. This review provides an update on the most important stellar-evolution limits and discusses them in the context of other information from cosmology and laboratory experiments.

Collection of "Extended Abstracts" of talks presented at the SFB-375 workshop NEUTRINO ... more Collection of "Extended Abstracts" of talks presented at the SFB-375 workshop NEUTRINO ASTROPHYSICS, Ringberg Castle, Tegernsee, Germany, 20-24 Oct. 1997. Topics include Solar Neutrinos, Supernovae, Gamma-Ray Bursts, High-Energy Neutrinos (atmospheric, astrophysical), Cosmology, and Future Prospects. The focus is on astrophysical and experimental/observational aspects of astrophysical neutrinos while particle theory and neutrino laboratory experiments are not covered

Abstract. Recent developments of those areas of astro-particle physics are discussed that were re... more Abstract. Recent developments of those areas of astro-particle physics are discussed that were represented at the HEP97 conference. In particular, the current status of direct and indirect dark-matter searches and of TeV neutrino and γ-ray astronomy will be reviewed. 1

arXiv: Astrophysics, 1995

We review some recent determinations of the amount of dark matter on galactic and larger scales, ... more We review some recent determinations of the amount of dark matter on galactic and larger scales, with special attention to the dark matter in the Milky Way. We then briefly review the motivation for and basic physics of several dark matter candidates, and then go into more depth for two candidates, the neutralino from supersymmetry, and the baryonic Macho candidate. We give some motivation for supersymmetry and review neutralino detection strategies. For Machos we give a description of the discovery of Machos via gravitational microlensing and the interpretation of the results with respect to the dark matter problem.

Axion emission by hot and dense plasmas is a new energy-loss channel for stars. Observational con... more Axion emission by hot and dense plasmas is a new energy-loss channel for stars. Observational consequences include a modification of the solar sound-speed profile, an increase of the solar neutrino flux, a reduction of the helium-burning lifetime of globular-cluster stars, accelerated white-dwarf cooling, and a reduction of the supernova SN 1987A neutrino burst duration. We review and update these arguments and summarize the resulting axion constraints.