A
bstract
A new family of higher spin algebras that arises upon restricting matrix extensions of
$$ \mathfrak{s}\mathfrak{h}\mathfrak{s}\left\lambda \right $$
s
h
s
λ
is found. We identify coset CFTs ...realising these symmetry algebras, and thus propose new higher spin-CFT dual pairs. These higher spin theories arise naturally as a subsector of string theory on AdS
3
× S
3
× S
3
× S
1
for specific ratios of the radii of the two spheres.
While the international nEDM collaboration at the Paul Scherrer Institut (PSI) took data in 2017 that covered a considerable fraction of the parameter space of claimed potential signals of ...hypothetical neutron (n) to mirror-neutron (n′) transitions, it could not test all claimed signal regions at various mirror magnetic fields. Therefore, a new study of n−n′ oscillations using stored ultracold neutrons (UCNs) is underway at PSI, considerably expanding the reach in parameter space of mirror magnetic fields (B′) and oscillation time constants (τnn′). The new apparatus is designed to test for the anomalous loss of stored ultracold neutrons as a function of an applied magnetic field. The experiment is distinguished from its predecessors by its very large storage vessel (1.47 m3), enhancing its statistical sensitivity. In a test experiment in 2020 we have demonstrated the capabilities of our apparatus. However, the full analysis of our recent data is still pending. Based on already demonstrated performance, we will reach sensitivity to oscillation times τnn′/cos(β) well above a hundred seconds, with β being the angle between B′ and the applied magnetic field B. The scan of B will allow the finding or the comprehensive exclusion of potential signals reported in the analysis of previous experiments and suggested to be consistent with neutron to mirror-neutron oscillations.
Higher spin algebras and large N = 4 holography Eberhardt, Lorenz; Gaberdiel, Matthias R.; Rienäcker, Ingo
The journal of high energy physics,
03/2018, Letnik:
2018, Številka:
3
Journal Article
Recenzirano
Odprti dostop
A
bstract
A new family of higher spin algebras that arises upon restricting matrix extensions of
s
h
s
λ
is found. We identify coset CFTs realising these symmetry algebras, and thus propose new ...higher spin-CFT dual pairs. These higher spin theories arise naturally as a subsector of string theory on AdS
3
× S
3
× S
3
× S
1
for specific ratios of the radii of the two spheres.
Commercial off-the-shelf (COTS) CMOS sensors are increasingly used in scientific applications on nanosatellites. Applying a software-based approach and in addition to their image acquisitions tasks, ...these CMOS sensors can be used to detect ionizing particles to improve the fault tolerance of imaging instruments on nanosatellites without the need for additional hardware. A challenge in using COTS components for this approach is that essential radiation test data and important parameters such as the thickness of the sensitive epitaxial layer are typically not available. With a simplified calibration approach, we determine the epitaxial layer thickness and calibrate the deposited energy sensitivity with minimal measurement time and steps and minor requirements on the test facility. A forward model for particle track length determination with an increased angle scattering of incident protons is used to handle stronger parameter uncertainties of the test setup. It is shown that the currently used CMOS sensor (HWK1910A) is a suitable candidate for a radiation monitor, based on the determined epitaxial layer thickness and the deposited energy calibration factor, in combination with the in-orbit mission data. This enables capabilities for more individual protection measures in case of unexpected radiation environments.
Abstract A new family of higher spin algebras that arises upon restricting matrix extensions of s h s λ $$ \mathfrak{s}\mathfrak{h}\mathfrak{s}\left\lambda \right $$ is found. We identify coset CFTs ...realising these symmetry algebras, and thus propose new higher spin-CFT dual pairs. These higher spin theories arise naturally as a subsector of string theory on AdS3 × S3 × S3 × S1 for specific ratios of the radii of the two spheres.
A new family of higher spin algebras that arises upon restricting matrix
extensions of $\mathfrak{shs}\lambda$ is found. We identify coset CFTs
realising these symmetry algebras, and thus propose new ...higher spin-CFT dual
pairs. These higher spin theories arise naturally as a subsector of string
theory on ${\rm AdS}_3\times {\rm S}^3 \times {\rm S}^3 \times {\rm S}^1$ for
specific ratios of the radii of the two spheres.
A new family of higher spin algebras that arises upon restricting matrix extensions of \(\mathfrak{shs}\lambda\) is found. We identify coset CFTs realising these symmetry algebras, and thus propose ...new higher spin-CFT dual pairs. These higher spin theories arise naturally as a subsector of string theory on \({\rm AdS}_3\times {\rm S}^3 \times {\rm S}^3 \times {\rm S}^1\) for specific ratios of the radii of the two spheres.
PDF
