Reports

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2019-08-21
15:55
[PUBDB-2019-03060] Report/Journal Article
et al
Revealing Hidden Facts of Li Anode in Cycled Lithium–Oxygen Batteries through X-ray and Neutron Tomography
[I-20170061]
The gap between the successful application and perspective promise of lithium–oxygen battery (LOB) technology should be filled by an in-depth and comprehensive understanding of the underlying working and degradation mechanisms. Herein, the correlation between the morphological evolution of the Li anode and the overall cell electrochemical performance of cycled LOBs has been revealed for the first time by complementary X-ray and neutron tomography, together with further postmortem scanning electron microscopy, X-ray diffraction, and Fourier transfrom infrared spectroscopy characterizations. [...]
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ddc:333.7
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2019-08-21
10:48
OpenAccess [PUBDB-2019-03051] Report/Journal Article
et al
Search for pair production of Higgs bosons in the $b\bar{b}b\bar{b}$ final state using proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
[CERN-EP-2018-029; arXiv:1804.06174]
A search for Higgs boson pair production in the $ b\overline{b}b\overline{b} $ final state is carried out with up to 36.1 fb$^{−1}$ of LHC proton-proton collision data collected at $ \sqrt{s}=13 $ TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. [...]
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ddc:530
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2019-08-19
12:30
OpenAccess [PUBDB-2019-03034] Report/Journal Article
et al
Search for light resonances decaying to boosted quark pairs and produced in association with a photon or a jet in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
[arXiv:1801.08769; CERN-EP-2017-280]
This Letter presents a search for new light resonances decaying to pairs of quarks and produced in association with a high-$p_T$ photon or jet. The dataset consists of proton–proton collisions with an integrated luminosity of 36.1 fb$^{−1}$ at a centre-of-mass energy of $\sqrt{s}=13$ TeV recorded by the ATLAS detector at the Large Hadron Collider. [...]
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ddc:530
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2019-08-19
11:47
OpenAccess [PUBDB-2019-03033] Report/Journal Article
et al
Search for scalar resonances decaying into $\mu^+\mu^-$ in events with and without $b$-tagged jets produced in proton-proton collisions at $\sqrt{s} =$ 13 TeV with the ATLAS detector
[arXiv:1901.08144; CERN-EP-2018-300]
A search for a narrow scalar resonance decaying into an opposite-sign muon pair produced in events with and without b-tagged jets is presented in this paper. The search uses 36.1 fb$^{−1}$ of $\sqrt{s} =$ 13 TeV proton-proton collision data recorded by the ATLAS experiment at the LHC. [...]
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ddc:530
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2019-08-19
11:35
OpenAccess [PUBDB-2019-03032] Report/Journal Article
et al
Conformal perturbation theory confronts lattice results in the vicinity of a critical point
[arXiv:1904.12749; DESY-19-073]
We study the accuracy and predictive power of conformal perturbation theory by a comparison with lattice results in the neighborhood of the finite-temperature deconfinement transition of SU(2) Yang-Mills theory, assuming that the infrared properties of this non-Abelian gauge theory near criticality can be described by the Ising model. The results of this comparison show that conformal perturbation theory yields quantitatively accurate predictions in a broad temperature range [...]
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ddc:530
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2019-08-15
14:57
OpenAccess [PUBDB-2019-03025] Report/Journal Article
et al
Compact Multistage Plasma-Based Accelerator Design for Correlated Energy Spread Compensation
[arXiv:1811.07757]
The extreme electromagnetic fields sustained by plasma-based accelerators could drastically reduce the size and cost of future accelerator facilities. However, they are also an inherent source of correlated energy spread in the produced beams, which severely limits the usability of these devices. [...]
OpenAccess: PhysRevD.99.114008 - Download fulltextPDF Download fulltextPDF (PDFA); Ferran Pousa_multistage_compensation - Download fulltextPDF Download fulltextPDF (PDFA);
ddc:530
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2019-08-15
11:48
OpenAccess [PUBDB-2019-03016] Report/Journal Article
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Probing the photonic content of the proton using photon-induced dilepton production in p+Pb collisions at the LHC
[arXiv:1901.06305; DESY-19-010]
We propose a new experimental method to probe the photon parton distribution function inside the proton (photon PDF) at LHC energies. The method is based on the measurement of dilepton production from the $γp → ℓ^+ ℓ^- + X$ reaction in proton-lead collisions. [...]
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ddc:530
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2019-08-14
15:24
OpenAccess [PUBDB-2019-03013] Book/Report/Dissertation / PhD Thesis

From the Machine-Detector Interface to Electroweak Precision Measurements at the ILC — Beam-Gas Background, Beam Polarization and Triple Gauge Couplings
[DESY-THESIS-2019-018]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 330 pp. () [10.3204/PUBDB-2019-03013] = Dissertation, Univeristy of Hamburg, 2019  GO
The International Linear Collider (ILC) is a planned electron-positron collider with a first stage at a center-of-mass energy of 250 GeV. The electron beam will be polarized to 80% and the positron beam to 30%. [...]
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2019-08-14
13:31
OpenAccess [PUBDB-2019-03011] Book/Report/Dissertation / PhD Thesis

Electron-beam diagnostics for a laser-driven plasma wakefield accelerator in the framework of FLASHForward
[DESY-THESIS-2019-015]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 139 pp. () [10.3204/PUBDB-2019-03011] = Dissertation, Universität Hamburg, 2018  GO
Plasma wakefields are a promising approach for the acceleration of electrons with ultrahigh (10 to 100 GV/m) electric fields. Nowadays, high-intensity laser pulses are routinely utilized to excite these large-amplitude plasma waves. [...]
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2019-08-13
20:50
OpenAccess [PUBDB-2019-03009] Book/Report/Dissertation / PhD Thesis

High-precision computation of observables in supersymmetric Yang–Mills theory
[DESY-THESIS-2019-019]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 149 pp. () [10.3204/PUBDB-2019-03009] = Dissertation, Universität Hamburg, 2019  GO
In this thesis we discuss modern mathematical tools for the perturbative analysis of supersymmetric Yang–Mills theories (abbreviated SYM). We apply contemporary and traditional computational techniques to two kind of problems. [...]
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