Stable Carborane Biradicals

Eriksson, Leif A.; Vyakaranam, Kamesh; Ludvík, J.; Michl, Josef

doi:10.1055/s-2007-968649

Cited by 21 publications

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

AGN jets under the microscope: A divide?

et al. 2012

View full text Add to dashboard Cite

A new paradigm for active galactic jet kinematics has emerged through detailed investigations of BL Lac objects using very long baseline radio interferometry. In this new scheme, most, if not all, jet components appear to remain stationary with respect to the core but show significant non-radial motions. This paper presents results from our kinematic investigation of the jets of a statistically complete sample of radio-loud flat-spectrum active galaxies, focusing on the comparison between the jet kinematic properties of BL Lacs and flat-spectrum radio-quasars. It is shown that there is a statistically significant difference between the kinematics of the two AGN classes, with BL Lacs showing more bent jets, that are wider and show slower movement along the jet axis, compared to flat-spectrum radio-quasars. This is interpreted as evidence for helically structured jets.

show abstract

AGN jets under the microscope: A divide?

et al. 2012

View full text Add to dashboard Cite

show abstract

Scattering amplitudes in open superstring theory

Schlotterer

2011

Fortschritte der Physik

View full text Add to dashboard Cite

This review is concerned with scattering amplitudes in open superstring theories. In particular, we introduce two different formalisms to compute tree level amplitudes – the Ramond Neveu Schwarz‐ (RNS‐) and the Pure Spinor (PS‐) formalism. The RNS approach proves to be flexible in describing compactifications from ten to four flat spacetime dimensions. We solve the technical problems due to the underlying interacting conformal field theory on the worldsheet. This is exploited to extract phenomenologically relevant scattering amplitudes of gluons and quarks as well as production‐ and decay rates of massive vibration modes which have already been identified as virtual exchange particles at the massless level. In case of a TeV string scale, string specific signatures in parton collisions might be observed at the LHC experiment in the near future and constitute the first experimental evidence for string theory. These statements apply to a wide class of string vacua and therefore bypass the so‐called landscape problem of string theory. The PS formalism allows for a manifestly supersymmetric treatment of scattering amplitudes in ten spacetime dimensions with sixteen supercharges. We introduce a family of superfields which arises in tree amplitudes of massless open string states and can be naturally identified with diagrams made of cubic vertices. We firstly achieve a compact superspace representation of multiparticle field theory amplitudes and moreover express the complete n point superstring amplitude as a minimal linear combination of partial field theory amplitudes and hypergeometric functions. The latter carry the stringy effects and are analyzed from different perspectives.

show abstract

The Large-Scale Structure in the Universe: From Power Laws to Acoustic Peaks

Martı́nez

2008

Data Analysis in Cosmology

View full text Add to dashboard Cite

The most popular tools for analysing the large scale distribution of galaxies are second-order spatial statistics such as the two-point correlation function or its Fourier transform, the power spectrum. In this review, we explain how our knowledge of cosmic structures, encapsulated by these statistical descriptors, has evolved since their first use when applied on the early galaxy catalogues to the present generation of wide and deep redshift surveys. 1

show abstract

Stable Carborane Biradicals

Cited by 21 publications

References 0 publications

AGN jets under the microscope: A divide?

AGN jets under the microscope: A divide?

Scattering amplitudes in open superstring theory

The Large-Scale Structure in the Universe: From Power Laws to Acoustic Peaks

Contact Info

Product

Resources

About