Publications database

A search for scalar or pseudoscalar states decaying to a top quark-antiquark pair ($\mathrm{t \bar{t}}$), using $138 \mathrm{ fb}^{-1}$ of pp collision data taken at $\sqrt{s} = 13 \mathrm{ TeV}$ using the CMS detector, is presented. Events with one or two leptons are analyzed using the invariant $\mathrm{t \bar{t}}$ mass ($m_{\mathrm{t \bar{t}}}$) as well as angular and spin correlation observables. [...]

We describe the variable flavor number scheme to three-loop order, which modifiesthe massless parton densities by single- and two-mass effects and introduces heavy-quarkparton distribution functions for charm and bottom. A renormalization group analysisshows the validity of this picture at large scales $Q^2$, where it resembles thenon-power-suppressed heavy-flavor corrections completely. [...]

Linear polarization analysis of hard x-rays is employed to probe electronic anisotropies in metal-containing complexes with high selectivity. We use polarization-resolved nuclear forward scattering (PR-NFS) of synchrotron radiation at the 14.4 keV nuclear resonance of Fe57 to determine electric field gradients (EFGs) in an iron(II) spin-crossover compound as they evolve during a temperature-dependent high-spin/low-spin transition. [...]

Intercalation of magnetic atoms into van der Waals materials provides a versatile platform for tailoring unconventional magnetic properties. However, its impact on electronic dimensionality and exchange mechanisms remains poorly understood. [...]

A hot deconfined medium known as the quark-gluon plasma (QGP) is created in collisions of ultrarelativistic heavy nuclei. In these systems, hadron production is strongly modified relative to proton-proton (pp) interactions. [...]

Polarized ion beams at the Electron Ion Collider (EIC) are essential to address some of the most important open questions at the twenty-first century frontiers of understanding of the fundamental structure of matter. Here, we summarize the science case and identify polarized $^2$H, $^3$He, $^6$Li, and $^7$Li ion beams as critical technology that will enable experiments which address the most important science [...]

In strongly correlated transition metal dichalcogenides, an intricate interplay of polaronic distortions, stacking arrangement, and electronic correlations determines the nature of the insulating state. Here, we study the response of the electronic structure to optical excitations to reveal the effect of chemical electron doping on this complex interplay. [...]

Using the worldline in-in effective action obtained in [1 ], we derive the total even-in-velocity relative impulse, scattering angle, and time delay at fifth post-Newtonian (5PN) order, including radiation-reaction and hereditary contributions at (G$^{5}$ν$^{2}$) and 𝒪(G$^{6}$ν$^{2}$). We introduce an isotropic-like description which, together with the associated losses of energy and angular momentum, fixes the evolution of the system entirely from scattering data. [...]