Publications database

The ATLAS trigger system is a crucial component of the ATLAS experiment at the LHC.It is responsible for selecting events in line with the ATLAS physics programme. This paper presentsan overview of the changes to the trigger and data acquisition system during the second longshutdown of the LHC,and shows the performance of the trigger system and its components in the proton-proton collisionsduring the 2022 commissioning period as well as its expected performance inproton-proton and heavy-ion collisions for the remainder of the third LHC data-taking period (2022–2025)..

Measurements of inclusive and differential production cross-sections of a top-quark-top-antiquark pair in association with a W boson ($ t\overline{t}W $) are presented. They are performed by targeting final states with two same-sign or three isolated leptons (electrons or muons) and are based on $ \sqrt{s} $ = 13 TeV proton-proton collision data with an integrated luminosity of 140 fb$^{−1}$, recorded from 2015 to 2018 with the ATLAS detector at the Large Hadron Collider [...]

Measurements of both the inclusive and differential production cross sections of a top-quark-top-antiquark pair in association with a $Z$ boson ($t\bar{t}Z$) are presented. Final states with two, three or four isolated leptons (electrons or muons) are targeted. [...]

The structural behavior of lanthanum metal has been investigated up to 227 GPa using synchrotron x-ray diffraction. Rather than having the rhombohedral or orthorhombic structures previously reported to be stable above 80 GPa, we find that La adopts the tetragonal tI2 structure seen previously in Ce and Pr. [...]

Sequential infiltration synthesis (SIS), also known as vapor phase infiltration (VPI), is a quickly expanding technique that allows growth of inorganic materials within polymers from vapor phase precursors. With an increasing materials library, which encompasses numerous organometallic precursors and polymer chemistries, and an expanding application space, the importance of understanding the mechanisms that govern SIS growth is ever increasing. [...]

While metal-mediated self-assembly is a populartechnique to construct discrete nanosized objects,highly symmetric structures, built from one type ofligand at a time, are dominating reported systems. Thetailored integration of a set of different ligands requiressophisticated approaches to avoid narcissistic separationor formation of statistical mixtures. [...]

We report a series of Pd(II)$_n$L$_{2n}$ coordination rings for whichnuclearity is controlled by the binding angle of the correspondingbis-monodentate bridging ligands. Judicious choice of theangle within a family of rather rigid ligands allowed for the firsttimeto synthesize a homoleptic five-membered Pd$_5$L$_{10}$ ring thatdoes not require any template to form. [...]

Heteroleptic coordination cages, nonstatistically assembled from a set of matching ligands, can be obtained by mixing individual components or via cage-to-cage transformations from homoleptic precursors. Based on the latter approach, we here describe a new level of self-sorting in coordination cage systems, namely, ‘heteromeric completive self-sorting’. [...]

Excitation with synchrotron radiation has provided a powerful means to study the intrinsic and dopant-relatedluminescent phenomena of wide bad-gap dielectrics. In this study, the luminescent properties of Mn- and Crdopedsingle crystalline films of .-Al$_2$O$_3$ (sapphire), grown using the liquid phase epitaxy method fromPbO–B$_2$O$_3$ flux onto C plane-oriented sapphire crystal substrates, were systematically investigated using absorptionand cathodoluminescence spectra as well as the conventional and advanced photoluminescent spectroscopyunder synchrotron radiation excitation [...]

Optical and luminescence properties of Y$_3$Al$_5$O$_{12}$ (YAG) single crystals preliminary irradiated by swift heavy ionswere studied. Swift heavy Xe ions with fluences ranging from 6 x 10$^{10}$ to 2 x 10$^{12}$ ions/cm$^2$ were utilized for theirradiation of nominally undoped YAG single crystals. [...]