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2025-03-21
13:42
OpenAccess [PUBDB-2025-01129] Preprint
; ; ; et al
Towards a vacuum birefringence experiment at the Helmholtz International Beamline for Extreme Fields (Letter of Intent of the BIREF@HIBEF Collaboration)
[arXiv:2405.18063]
Quantum field theory predicts a nonlinear response of the vacuum to strong electromagnetic fields of macroscopic extent. This fundamental tenet has remained experimentally challenging and is yet to be tested in the laboratory. [...]
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2025-03-21
12:17
OpenAccess [PUBDB-2025-01128] Preprint
; ; ; et al
Variational quantum eigensolver for causal loop Feynman diagrams and directed acyclic graphs
[IFIC/22-28; arXiv:2210.13240]
We present a variational quantum eigensolver (VQE) algorithm for the efficient bootstrapping of the causal representation of multiloop Feynman diagrams in the loop-tree duality or, equivalently, the selection of acyclic configurations in directed graphs. A loop Hamiltonian based on the adjacency matrix describing a multiloop topology, and whose different energy levels correspond to the number of cycles, is minimized by VQE to identify the causal or acyclic configurations. [...]
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2025-03-21
12:07
OpenAccess [PUBDB-2025-01127] Preprint
; ; ; et al
Detecting and mitigating mode-collapse for flow-based sampling of lattice field theories
[arXiv:2302.14082]
We study the consequences of mode-collapse of normalizing flows in the context of lattice field theory. Normalizing flows allow for independent sampling. [...]
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2025-03-21
11:56
OpenAccess [PUBDB-2025-01126] Preprint
; ; ; et al
Nonperturbative renormalization of asymmetric staple-shaped operators in twisted mass lattice QCD
[arXiv:2305.11824]
Staple-shaped Wilson line operators are necessary for the study of transverse momentum-dependent parton distribution functions (TMDPDFs) in lattice QCD and beyond. In this work, we study the renormalization of such operators in the general case of an asymmetric staple. [...]
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2025-03-20
12:18
OpenAccess [PUBDB-2025-01116] Journal Article
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Beyond surface area: Enhanced pseudocapacitive properties of cobalt layered double hydroxide through structural modifications
Cobalt hydroxide and other first-row transition metal hydroxides have gained significant attention as pseudocapacitor materials due to their rapid and reversible redox processes. Their layered structures facilitate interactions between electrolyte anions and cobalt cation sites within the bulk of the material, enabling higher charge density and extending redox activity beyond the particle surface. [...]
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2025-03-20
10:07
[PUBDB-2025-01114] Journal Article
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Direct Observation of Early-Stage Polymer Crystallization Driven by Surface Wrinkling and Compressive Stress in Thin Films
The early stages of crystallization and occurrence of surface wrinkling were investigated using poly(butadiene)-block-poly(ε-caprolactone) with an ordered lamellar structure. Direct evidence has demonstrated that surface wrinkling precedes nucleation and crystal growth. [...]
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2025-03-19
17:47
[PUBDB-2025-01110] Journal Article
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Enhanced thermal stability of magnetic properties in cobalt thin films via zigzag nanostructuring
This study introduces an approach to enhance the thermal stability of the magnetic properties of the polycrystalline thin films via zigzag nanostructuring through a sequential oblique angle deposition (S-OAD) technique. The magnetic behavior of the zigzag cobalt (Co) films deposited using the S-OAD technique is driven by the interplay between interface-induced anisotropy, shape anisotropy, and magneto-crystalline anisotropy (MCA) [...]
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2025-03-19
15:15
OpenAccess [PUBDB-2025-01106] Preprint
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Measurements of the inclusive W and Z boson production cross sections and their ratios in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV
[CERN-EP-2025-013; CMS-SMP-22-017; arXiv:2503.09742]
Measurements are presented of the W and Z boson production cross sections in proton-proton collisions at a center-of-mass energy of 13.6 TeV. Data collected in 2022 and corresponding to an integrated luminosity of 5.01 fb$^{-1}$ with one or two identified muons in the final state are analyzed. [...]
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2025-03-19
15:12
OpenAccess [PUBDB-2025-01105] Preprint
; ; ; et al
Small-$x$ evolution of gluon fields from incoherent J/$\psi$ photoproduction in ultraperipheral PbPb collisions
[CERN-EP-2025-030; CMS-HIN-23-009; arXiv:2503.08903]
Incoherent J/$\psi$ photoproduction in heavy ion ultraperipheral collisions (UPCs), in which the photon interacts with localized, fluctuating gluonic hotspots rather than the entire nucleus, provides a unique probe of those fluctuations. This study presents the first measurement of the dependence of this photoproduction yield on the photon-nucleon center-of-mass energy ($W_\gamma^\mathrm{N}$), using PbPb UPCs at a nucleon-nucleon center-of-mass energy of 5.02 TeV. [...]
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2025-03-19
14:49
OpenAccess [PUBDB-2025-01104] Preprint
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Search for the associated production of a Higgs boson with a charm quark in the diphoton decay channel in pp collisions at $\sqrt{s}$ = 13 TeV
[CERN-EP-2025-010; CMS-HIG-23-010; arXiv:2503.08797]
This paper presents the first search for the associated production of a Higgs boson with a charm quark (cH), with the Higgs boson decaying to two photons. Associated cH production provides an opportunity to probe the coupling of the Higgs boson to charm quarks. [...]
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