Documents in process

The advancement of particle physics through current and future collider facilities pushes theboundaries of technology in HEP instrumentation. Experiments at the energy and intensityfrontier focus on high-precision measurements of Standard Model physics and searches forphysics beyond the Standard Model. [...]

Haynes® 282, a nickel-based superalloy, is renowned for its exceptional strength, thermal stability, and resistanceto oxidation and creep. While directed energy deposition arc-based additive manufacturing of this alloy hasbeen explored, the formation of large columnar grains and high texture leading to anisotropy and suboptimalmechanical performance remains a significant challenge. [...]

Additive manufacturing (AM) of parts is typically associated with the generation of high residual stresses because of repeatedexposure to high thermal gradients. Non-destructivemeans of mapping the residual stresses are required for optimising theseprocesses and/or mitigating such stresses by thermal treatments. [...]

The orthorhombic O phase precipitation within the D019-α2 phase has attracted increasing attention recently inhigh Nb containing TiAl (high Nb-TiAl) alloys since the precipitation temperature is close to the expected servicetemperature of the alloys. In this study, in-situ synchrotron high energy X-ray diffraction (HEXRD) reveals thatthe O phase precipitates at 550 ◦C while it dissolves into the α2 phase at 750 ◦C during heat treatments. [...]

Solid-state additive manufacturing (AM) processes such as multi-layer friction surfacing (MLFS) can overcome typicaldisadvantages of fusion-based AM such as high residual stresses, porosity or hot cracking. The tool-less process setup ofMLFS prevents contamination of the resulting components, e.g., caused by wear or the use of lubricants. [...]

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. [...]

This contribution details the search forheavy neutral Higgs bosons from an extended Higgs sector decaying into b-quarks and produced in association with at least one b-quark. These scalarstates are predicted to have a significantly enhanced coupling to b-quarks invarious scenarios within MSSM and 2HDM models at large tanβ. [...]

The CMS at DESY outreach Instagram account (@cmsatdesy) serves as a platform for science communication and outreach for a large experimental particle physics group. The initiative aims to promote scientific research, engage young scientists in outreach activities, and showcase their contributions. [...]