Journal Article

The magnetic line defect in the O(N) model gives rise to a non-trivial one-dimensional defect conformal field theory of theoretical and experimental value. This model is considered here in $d = 4-\varepsilon$ and the full spectrum of defect operators with dimensions close to one, two and three at order ɛ is presented. [...]

Many lattice QCD simulations now have many lattice spacings available, and it is of interest to investigate how they scale. In this talk we first derive renormalisation group equations appropriate for 2+1 clover fermions. [...]

We investigate the potential of future electron-positron colliders, such as FCC-ee and CEPC, to probe 2-Higgs-doublet models (2HDMs) that facilitate a strong first-order electroweak phase transition (SFOEWPT), a necessary condition for electroweak baryogenesis. Focusing on a 2HDM in the CP-conserving limit, we identify parameter regions consistent with an SFOEWPT and evaluate their compatibility with projected precision electroweak and Higgs measurements, as well as searches for exotic Higgs bosons. [...]

A measurement of the top-quark pole mass $m_{t}^\text{pole}$ is presented in $t\bar{t}$ events with an additional jet, $t\bar{t}+1\text{-jet}$, produced in $pp$ collisions at $\sqrt{s}=13$ TeV. The data sample, recorded with the ATLAS experiment during Run 2 of the LHC, corresponds to an integrated luminosity of 140 $\text{fb}^{-1}$. [...]

Axion-like particles (ALPs) are hypothetical particles that emerge in numerous theoretical extensions to the Standard Model. Their coupling to electromagnetic field implies that ALPs would mix with photons in the presence of external magnetic fields. [...]

The colliding-wind binary system η Carinae has been identified as a source of high-energy (HE, below ∼100 GeV) and very high-energy (VHE, above ∼100 GeV) gamma rays in the last decade, making it unique among these systems. With its eccentric 5.5-year-long orbit, the periastron passage, during which the stars are separated by only 1–2 au, is an intriguing time interval to probe particle acceleration processes within the system [...]

The results of the first extragalactic gamma-ray survey by the High Energy Stereoscopic System (H.E.S.S.) are presented. The survey comprises 2720 hours of very high-energy gamma-ray observations of the extragalactic sky, recorded with H.E.S.S [...]

Fast Radio Bursts (FRBs) are highly energetic, extremely short-lived bursts of radio flashes. Despite extensive research, the exact cause of these outbursts remains speculative. [...]

TiFe2 alloys, a C14 Laves phase system, exhibit negative or zero thermal expansion (NTE/ZTE) despite theabsence of the first-order transitions that typically drive such behavior in related compounds. Across thecompositional range, the magnetic ground state evolves from ferromagnetic ordering in Fe-rich alloysto antiferromagnetic ordering in Ti-rich variants, yet the thermal expansion response remains invariant.High-resolution synchrotron X-ray and neutron diffraction detect no anomalies in lattice volume ormagnetic moment, and Rietveld refinements exclude significant antisite disorder. [...]

This paper describes how intentional and unintentional radioemission from airplanes is recorded with the Radio NeutrinoObservatory Greenland (RNO-G). We characterize the receivedsignals and define a procedure to extract a clean set of impulsivesignals. [...]