Zobrazeno 1 - 10
of 195
pro vyhledávání: '"Raffelt, Georg G."'
In dense neutrino environments, such as provided by core-collapse supernovae or neutron-star mergers, neutrino angular distributions may be unstable to collective flavor conversions, whose outcome remains to be fully understood. These conversions are
Externí odkaz:
http://arxiv.org/abs/2409.17232
Publikováno v:
JHEP 08 (2024) 225
Neutrino-neutrino refraction leads to collective flavor evolution that can include fast flavor conversion, an ingredient still missing in numerical simulations of core-collapse supernovae. We provide a theoretical framework for the linear regime of t
Externí odkaz:
http://arxiv.org/abs/2406.06708
Publikováno v:
Phys.Rev.Lett. 133 (2024) 2, 021002
Flavor-dependent neutrino transport is described by a well-known kinetic equation for occupation-number matrices in flavor space. However, as an overlooked theoretical problem, we show that in the inhomogeneous case, neutrino-neutrino refractive ener
Externí odkaz:
http://arxiv.org/abs/2401.05278
The paradigm-changing possibility of collective neutrino-antineutrino oscillations was recently advanced in analogy to collective flavor oscillations. However, the amplitude for the backward scattering process $\nu_{\mathbf{p}_1}\overline\nu_{\mathbf
Externí odkaz:
http://arxiv.org/abs/2401.02478
Publikováno v:
Phys.Rev.D 109 (2024) 6, 063021
In dense astrophysical environments, notably core-collapse supernovae and neutron star mergers, neutrino-neutrino forward scattering can spawn flavor conversion on very short scales. Scattering with the background medium can impact collective flavor
Externí odkaz:
http://arxiv.org/abs/2312.07612
Publikováno v:
Phys. Rev. D 107, 043024, 2023
The flavor evolution of a neutrino gas can show ''slow'' or ''fast'' collective motion. In terms of the usual Bloch vectors to describe the mean-field density matrices of a homogeneous neutrino gas, the slow two-flavor equations of motion (EOMs) are
Externí odkaz:
http://arxiv.org/abs/2301.09650
Publikováno v:
Phys. Rev. Lett. 131, 021001 (2023)
Majoron-like bosons would emerge from a supernova (SN) core by neutrino coalescence of the form $\nu\nu\to\phi$ and $\bar\nu\bar\nu\to\phi$ with 100 MeV-range energies. Subsequent decays to (anti)neutrinos of all flavors provide a flux component with
Externí odkaz:
http://arxiv.org/abs/2209.11773
In compact astrophysical objects, the neutrino density can be so high that neutrino-neutrino refraction can lead to fast flavor conversion of the kind $\nu_e \bar\nu_e \leftrightarrow \nu_x \bar\nu_x$ with $x=\mu,\tau$, depending on the neutrino angl
Externí odkaz:
http://arxiv.org/abs/2209.11235
Publikováno v:
Phys.Rev.Lett. 128 (2022) 12, 121102
In core-collapse supernovae or compact binary merger remnants, neutrino-neutrino refraction can spawn fast pair conversion of the type $\nu_e \bar\nu_e \leftrightarrow \nu_x \bar\nu_x$ (with $x=\mu, \tau$), governed by the angle-dependent density mat
Externí odkaz:
http://arxiv.org/abs/2109.14627
Publikováno v:
JCAP 09 (2017) 005
Axion-photon conversion at dielectric interfaces, immersed in a near-homogeneous magnetic field, is the basis for the dielectric haloscope method to search for axion dark matter. In analogy to transition radiation, this process is possible because th
Externí odkaz:
http://arxiv.org/abs/1707.00701