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13 papers found.
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Moduli anomalies and local terms in the operator product expansion

Abstract Local terms in the Operator Product Expansion in Superconformal Theories with extended supersymmetry are identified. Assuming a factorized structure for these terms their contributions are discussed.

Off-shell superconformal higher spin multiplets in four dimensions

We formulate off-shell \( \mathcal{N} \) = 1 superconformal higher spin multiplets in four spacetime dimensions and briefly discuss their coupling to conformal supergravity. As an example, we explicitly work out the coupling of the superconformal gravitino multiplet to conformal supergravity. The corresponding action is super-Weyl invariant for arbitrary supergravity backgrounds...

Pseudempleurosoma haywardi sp. nov. (Monogenea: Ancyrocephalidae (sensu lato) Bychowsky & Nagibina, 1968): An endoparasite of croakers (Teleostei: Sciaenidae) from Indonesia

colleagues from our institute for providing and translating Russian and Vietnamese literature, namely Ekaterina Pikalov and Truong Van Thuong. Author Contributions Conceptualization: Stefan Theisen. Data ... curation: Stefan Theisen. Formal analysis: Stefan Theisen, Sonja Kleinertz. Funding acquisition: Stefan Theisen. Investigation: Stefan Theisen, Sarah H. Al-Jufaili. Methodology: Stefan Theisen, Sarah H

Can gravitational instantons really constrain axion inflation?

Axions play a central role in inflationary model building and other cosmological applications. This is mainly due to their flat potential, which is protected by a global shift symmetry. However, quantum gravity is known to break global symmetries, the crucial effect in the present context being gravitational instantons or Giddings-Strominger wormholes. We attempt to quantify, as...

Some aspects of holographic W-gravity

We use the Chern-Simons formulation of higher spin theories in three dimensions to study aspects of holographic W-gravity. Concepts which were useful in studies of pure bulk gravity theories, such as the Fefferman-Graham gauge and the residual gauge transformations, which induce Weyl transformations in the boundary theory and their higher spin generalizations, are reformulated in...

Invariants for minimal conformal supergravity in six dimensions

We develop a new off-shell formulation for six-dimensional conformal super-gravity obtained by gauging the 6D \( \mathcal{N} \) = (1, 0) superconformal algebra in superspace. This formulation is employed to construct two invariants for 6D \( \mathcal{N} \) = (1, 0) conformal super-gravity, which contain C 3 and C□C terms at the component level. Using a conformal supercurrent...

The conformal supercurrents in diverse dimensions and conserved superconformal currents

Given a conserved and traceless energy-momentum tensor and a conformal Killing vector, one obtains a conserved current. We generalise this construction to superconformal theories in three, four, five and six dimensions with various amounts of supersymmetry by working in the appropriate superspaces.

On scale and conformal invariance in four dimensions

We study the implications of scale invariance in four-dimensional quantum field theories. Imposing unitarity, we find that infinitely many matrix elements vanish in a suitable kinematical configuration. This vanishing is a nontrivial necessary condition for conformality. We provide an argument why this is expected to be a sufficient condition as well, thereby linking scale and...

Anomalies, conformal manifolds, and spheres

The two-point function of exactly marginal operators leads to a universal contribution to the trace anomaly in even dimensions. We study aspects of this trace anomaly, emphasizing its interpretation as a sigma model, whose target space \( \mathrm{\mathcal{M}} \) is the space of conformal field theories (a.k.a. the conformal manifold). When the underlying quantum field theory is...

Heterotic flux backgrounds and their IIA duals

We study four-dimensional heterotic flux vacua with N = 2 spacetime supersymmetry. A worldsheet perspective is used to clarify quantization conditions associated to the fluxes and the constraints these place on the moduli spaces of resulting compactifications. We propose that these vacua fit naturally in the context of heterotic/IIA duality as heterotic duals to compactifications...

Microbial Diversity and Parasitic Load in Tropical Fish of Different Environmental Conditions

In this study we analysed fecal bacterial communities and parasites of three important Indonesian fish species, Epinephelus fuscoguttatus, Epinephelus sexfasciatus and Atule mate. We then compared the biodiversity of bacterial communities and parasites of these three fish species collected in highly polluted Jakarta Bay with those collected in less polluted Indonesian areas of...

String theory as a theory of quantum gravity: a status report

Matthias Blau 0 Stefan Theisen 0 0 S. Theisen Max-Planck-Institut fr Gravitationsphysik, Albert-Einstein-Institut , 14476 Golm, Germany We review the status of string theory as a quantum theory of