Neutrino Fields in a Sandwich Gravitational Wave Background
Tekin Dereli, Ozay Gurtug, Mustafa Halilsoy, Yorgo Senikoglu

TL;DR
This paper solves the linearized Einstein-Weyl equations exactly in a sandwich gravitational wave background, revealing how neutrino energy-momentum redistributes and varies, which could inform cosmological neutrino studies.
Contribution
It provides an exact solution for neutrino fields in a sandwich gravitational wave background, a novel analysis in this context.
Findings
Neutrino energy-momentum redistributes depending on wave geometry
Neutrino energy density varies between positive and negative extrema
Potential implications for understanding weakly interacting neutrinos in cosmology
Abstract
Sandwich gravitational waves are given globally in terms of step functions at the boundaries. Linearized Einstein-Weyl equations are solved exactly in this background in Rosen coordinates. Depending on the geometry and composition of the sandwich wave, the neutrino's energy-momentum redistributes itself. At the test field level, since the background will not change, the neutrino's energy density in particular will show variations between positive and negative extrema when crossing the sandwich wave. This may reveal facts about the weakly interacting neutrinos in cosmology.
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Taxonomy
TopicsPulsars and Gravitational Waves Research · Neutrino Physics Research · Cosmology and Gravitation Theories
