Publications database

The mass of the top quark is measured using top-quark-top-antiquark pair events with high transverse momentum top quarks. The dataset, collected with the ATLAS detector in proton–proton collisions at $\sqrt{s}$ = 13 TeV delivered by the Large Hadron Collider, corresponds to an integrated luminosity of 140 fb$^{−1}$. [...]

We illustrate the potential of a future high-intensity $e^+ e^-$ collider running at the Z pole in probing extensions of the Standard Model via precise measurements of flavor-changing processes. We illustrate this potential both within effective field theories and simplified models inspired by current B-physics data, focusing on selected flavor-physics measurement projections at FCC-ee, and by the theoretically well-motivated scenario of TeV-scale new physics predominantly coupled to third-generation fields. [...]

This paper presents a first measurement of the cross-section for the charged-current Drell-Yan process $pp\rightarrow W^{\pm} \rightarrow \ell^{\pm} \nu$ above the resonance region, where $\ell$ is an electron or muon. The measurement is performed for transverse masses, $m_{\text{T}}^{\text{W}}$, between 200 GeV and 5000 GeV, using a sample of 140~fb$^{-1}$ of $pp$ collision data at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV collected by the ATLAS detector at the LHC during 2015-2018 [...]

The mass of the top quark is measured using top-quark-top-antiquark pair events with high transverse momentum top quarks. The dataset, collected with the ATLAS detector in proton–proton collisions at $\sqrt{s}$ = 13 TeV delivered by the Large Hadron Collider, corresponds to an integrated luminosity of 140 fb$^{−1}$. [...]

Leading two-loop contributions to the di-photon decay of the Higgs boson are evaluated for the first time in the inert doublet model (IDM). We employ for this calculation the Higgs low-energy theorem, meaning that we obtain corrections to the Higgs decay process by taking Higgs-field derivatives of the leading two-loop contributions to the photon self-energy. [...]

Digital Silicon Photomultipliers (dSiPMs) and Monolithic Active Pixel Sensors (MAPS) are emerging technologies, fabricated using commercial Complementary Metal-Oxide-Semiconductor (CMOS) processes. These detectors have the potential to become key components in High-Energy Physics (HEP), with the ability to meet the demanding requirements of future experiments. [...]

Eine Präsentation erstellt für den Berufsschulunterricht zum Thema Open Access..

The structure of the Standard Model (SM) of particle physics points toward grand unifiedtheories (GUTs) where strong and electroweak interactions are unifiedin a non-Abelian GUT group. The spontaneous breaking of the GUTsymmetry to the SM symmetry, together with cosmic inflation,generically leads to metastable topological defects, the mostprominent example being cosmic strings. [...]

Precision measurements of the top quark mass at hadron colliders have been notoriously difficult. Energy-Energy Correlators (EECs) provide clean access to angular correlations in the hadronic energy flux, but their application to the precision mass measurements is less direct since they measure a dimensionless angular scale. [...]