Contributions to a conference proceedings

We demonstrate a stabilization system for temporal and spectral drifts of an OPCPA pump-probe laser at the FLASH soft-x-ray FEL-facility. We achieve drifts of 5.7fs rms and 3.2nm rms, respectively over two days [...]

X-ray Free-Electron Lasers rely on low-emittance photo-injectors driven by UV laser pulses. For optimum performance temporally shaped laser pulses are desired. [...]

The results of the most recent measurements of the inclusive $\mathrm{t\bar{t}}$ cross section performed by the ATLAS and CMS experiments at the CERN LHC are summarized. These include results obtained in proton-proton collisions at different centre-of-mass energies, and the first observation of $\mathrm{t\bar{t}}$ production in proton-lead collisions. [...]

An overview of neutral BSM direct Higgs searches in fermionic decays performed at CMS was presented. The first part focuses on BSM Higgs resonant searches interpreted within the Higgs-Two-Doublet Model (H2DM) framework and in particular the Minimal Supersymmetric Standard Model (MSSM). [...]

The predicted high sensitivity of the nuclear modification factor for K$^−$ in SIDIS due to the QCD based effect of medium-induced flavour conversion in the fragmentation function is studied at HERMES experiment. Unlike π+, π− and K$^+$ nuclear modification factor for K$^−$ is assumed to increase at high value of Bjorken variable $x_B$ and a hadron fraction energy $z$. [...]

Laser-aligned carbonyl-sulfide molecules were strong-field ionized using mid-infrared light. Investigating the strong-field effects in the molecular frame allowed to add novel facets to the understanding of the intrinsic nature of strong-field physics..

Extreme-ultraviolet pulses as short as 5 fs, produced by high- order harmonic generation and selected by a time-delay compensated monochromator, were fully reconstructed thanks to an advanced ptychographic technique, while most commonly used reconstruction methods fail. These pulses constitute the shortest extreme ultraviolet pulses ever achieved via a time-delay compensated monochromator..

The observed deviations from the Standard Model in several $b \to s\mu\mu$ processes can be explained in terms of a new vector boson produced on-shell in B meson decays. A mass of 2.5-3 GeV and a total width of 10-20% allow to hide the associated dimuon bump in the poorly known charmonium region, and the large invisible decay width can be interpreted in terms of Dark Matter. [...]

We briefly summarize some searches for Higgs bosons with a mass of $m_ϕ ≤ 110$~GeV at LEP and the LHC. We discuss a possible signal in the diphoton decay mode at $m_ϕ∼96~$GeV as reported by CMS, together with a $∼2σ$ hint in the $b\bar{b}$ final state at LEP [...]