Contribution to a book

The next-to-leading order single-differential top quark-antiquark pair production cross section predictions are examined consistently using short-distance top quark mass schemes, with the evolution of the mass of the top quark performed in the MSR scheme $m_{\rm t}^{\rm MSR}(\mu)$ for scales $\mu$ below the $\overline{\rm MS}$ top quark mass $\overline{m}_{\rm t}(\overline{m}_{\rm t})$, and in the $\overline{\rm MS}$ scheme $\overline{m}_{\rm t}(\mu)$ for scales above. The implementation of a mass renormalization scale independent of the strong coupling renormalization scale and factorization scale in quantum chromodynamics allows investigating independent dynamical scale variations, and a scale choice of $R\sim 80$ GeV is demonstrated to be important for the stability of the cross-section predictions in the low top quark-antiquark pair invariant mass range.Moreover, a choice of semi-dynamical renormalization and factorization scales is preferred, and the findings are demonstrated in a theoretically consistent extraction of the top quark MSR mass from experimental data..

The Crab system, composed of a bright pulsar wind nebula (PWN) powered by the young energetic central pulsar \crabpulsar, has been observed across the electromagnetic spectrum for decades of investigation. Its emission in the gamma-ray band has challenged our understanding of the radiation and particle acceleration processes at play for such systems. [...]

This chapter reflects on how disciplinary specific Communities of Practice (CoPs) can be a useful vehicle to share knowledge, experience and practices to further gender equality in R&I organisations. This paper shares the experiences of two CoPs set up with specific disciplinary focuses, one on physics and the other on life sciences. [...]

The PETRA IV storage ring is a project planned to upgrade the synchrotron light source PETRA III at DESY. The main aim is to decrease the horizontal emittance as low as 20 pmrad. [...]

Particle physics relies on Monte Carlo (MC) event generators for theory-data comparison, necessitating several samples to address theoretical systematic uncertainties at a high computational cost. The MC statistic becomes a limiting factor and the significant computational cost a bottleneck in most physics analyses. [...]

Many extensions of the standard model can give rise to tau leptons produced in non-conventional signatures in the detector. For example, certain long-lived particles can decay to produce taus that are displaced from the primary proton-proton interaction vertex. [...]

Ziel von openCost ist die Schaffung einer technischen Infrastruktur, mit der Publikationskosten über standardisierte Schnittstellen und Formate frei zugänglich abgerufen werden können. So soll eine Kostentransparenz auf institutioneller, nationaler und internationaler Ebene ermöglicht werden. [...]

Effects of carbon and nitrogen concentrations on precipitation sequence duringtempering of martensitic steels investigated by advanced experimental methodsand modelingJ. Teixeira, M [...]

Synchrotron-radiation phase-contrast tomography is a non-invasive technique that allows high-resolution imaging of soft structures. We present the first results of the cochlea (inner ear) of a harbor porpoise (Phocoena phocoena). [...]

Imaging anatomical features of the human brain at cellular resolution currently relies on series of physical sections with related slicing artefacts. So far, microtomography has been employed to image an entire human brain at a voxel size of 20µm and selected regions using 6µm. [...]