Documents in process

One method of achieving exceptional ductility and toughness of PH 13-8 Mo maraging steels is to perform agingat high temperatures or for prolonged dwell times, which is referred to as overaging. The increase in ductility andtoughness is primarily related to the formation of high amounts of reverted austenite during aging. [...]

The onset of plastic deformation is an important parameter for an accurate description of the flow curve and the Young’smodulus. Determining the actual physical start of flow is already experimentally challenging for classic sheet metal materials.In addition to the experimental challenge, the onset of flow depends on numerous parameters such as strain rate, temperatureand forming history. [...]

This study presents an experimental characterization of the interface strength ofthe shape memory alloy hybrid composite (SMAHC) consisting of the two-wayeffect NiTi shape memory alloy (SMA) wire structured by electrochemical etchingand the surrounding thermoset matrix. Mechanically induced, in situ thermallyinduced, and cyclic load-increase pull-out tests consistently reveal that SMAHCwith structured SMA wires outperforms those with as-delivered SMA wires by asubstantial factor of 2.6–2.7 in interfacial strength—the critical factor governingthe overall performance and functionality of the composite. [...]

Several processes studied by the ATLAS experiment at the Large Hadron Collider produce low-momentum b-flavored hadrons in the final state. This paper describes the calibration of a dedicated tagging algorithm that identifies b-flavored hadrons outside of hadronic jets by reconstructing the soft secondary vertices originating from their decays. [...]

A search for heavy pseudo-scalar (A) and scalar (H) Higgs bosons decaying into a top-quark pair ($ t\overline{t} $) has been performed with 140 fb$^{−1}$ of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a centre-of-mass energy of $ \sqrt{s} $ = 13 TeV. Interference effects between the signal process and Standard Model (SM) $ t\overline{t} $ production are taken into account [...]

A search for heavy pseudo-scalar (A) and scalar (H) Higgs bosons decaying into a top-quark pair ($ t\overline{t} $) has been performed with 140 fb$^{−1}$ of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a centre-of-mass energy of $ \sqrt{s} $ = 13 TeV. Interference effects between the signal process and Standard Model (SM) $ t\overline{t} $ production are taken into account [...]

A search for Higgs boson pair production via vector-boson fusion is performed in the Lorentz-boosted regime, where a Higgs boson candidate is reconstructed as a single large-radius jet, using 140 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} = 13$ TeV recorded by the ATLAS detector at the Large Hadron Collider. Only Higgs boson decays into bottom quark pairs are considered. [...]

This paper reports a summary of searches for a fermionic dark matter candidate in the context of theoretical models characterised by a mediator particle exchange in the $s$-channel. The data sample considered consists of $pp$ collisions delivered by the Large Hadron Collider during its Run 2 at a centre-of-mass energy of $\sqrt{s} = 13$ TeV and recorded by the ATLAS detector, corresponding to up to 140 $fb^{-1}$. [...]

A search for the resonant production of a heavy scalar $X$ decaying into a Higgs boson and a new lighter scalar $S$, through the process $X \to S(\to bb) H(\to \gamma\gamma)$, where the two photons are consistent with the Higgs boson decay, is performed. The search is conducted using an integrated luminosity of 140 fb$^{-1}$ of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. [...]

This paper describes measurements of the transverse momentum spectra of $W$ and $Z$ bosons produced in proton-proton collisions at centre-of-mass energies of $\sqrt{s}=5.02$ TeV and $\sqrt{s}=13$ TeV with the ATLAS experiment at the Large Hadron Collider. Measurements are performed in the electron and muon channels, $W \to \ell\nu$ and $Z \to \ell\ell$ ($\ell=e$ or $\mu$), and for $W$ events further separated by charge. [...]