3,170 research outputs found
Towards supersymmetric cosmology in M theory
We present a new solution in the heterotic M-theory in which the metric
depends on (cosmic) time. The solution preserves N=1 supersymmetry in 4
dimensions in the leading order of the expansion. It is the
first example of the time-dependent supersymmetric solution in M-theory on
. It describes expanding 4-dimensional space-time with shrinking
orientifold interval and static Calabi-Yau internal space.Comment: latex, 12 page
Astrophysical neutrinos flavored with Beyond the Standard Model physics
We systematically study the allowed parameter space for the flavor
composition of astrophysical neutrinos measured at Earth, including beyond the
Standard Model theories at production, during propagation, and at detection.
One motivation is to illustrate the discrimination power of the next-generation
neutrino telescopes such as IceCube-Gen2. We identify several examples that
lead to potential deviations from the standard neutrino mixing expectation such
as significant sterile neutrino production at the source, effective operators
modifying the neutrino propagation at high energies, dark matter interactions
in neutrino propagation, or non-standard interactions in Earth matter.
IceCube-Gen2 can exclude about 90% of the allowed parameter space in these
cases, and hence will allow to efficiently test and discriminate models. More
detailed information can be obtained from additional observables such as the
energy-dependence of the effect, fraction of electron antineutrinos at the
Glashow resonance, or number of tau neutrino events.Comment: 21 pages, 9 figures, 3 tables, v2: references added, typos corrected,
conclusion unchanged, matches final version in PR
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