Journal Article

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2017-11-20
10:54
[PUBDB-2017-12117] Journal Article
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Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy: In-situ high-energy SAXS/WAXS investigation
ddc:600
The aim of this work is to characterize the precipitation kinetics in Haynes® 282® superalloys using in-situ high-energy Small Angle X-ray Scattering (SAXS) together with Wide Angle X-ray Scattering (WAXS). The phases identified by WAXS include $\gamma$ (matrix), $\gamma$′ (hardening precipitates), MC (metallic carbides), and M$_{23}$C$_6$/M$_6$C (secondary metallic carbides) [...]
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2017-11-20
09:47
OpenAccess [PUBDB-2017-12115] Journal Article
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Running of the charm-quark mass from HERA deep-inelastic scattering data
ddc:530
Combined HERA data on charm production in deep-inelastic scattering have previously been used to determine the charm-quark running mass $m_{c}(m_{c})$ in the $\overline{MS}$renormalisation scheme. Here, the same data are used as a function of the photon virtuality $Q^2$ to evaluate the charm-quark running mass at different scales to one-loop order, in the context of a next-to-leading order QCD analysis [...]
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2017-11-16
23:55
[PUBDB-2017-12073] Journal Article
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Structural, magnetic and electronic properties of pulsed-laser-deposition grown SrFeO$_{3−δ}$ thin films and SrFeO$_{3−δ}$/La$_{2/3}$Ca$_{1/3}$MnO$_{3}$ multilayers
ddc:530
We studied the structural, magnetic and electronic properties of ${\rm SrFeO}_{3-\delta}$ (SFO) thin films and ${\rm SrFeO}_{3-\delta}$ /${\rm La}_{2/3}$ ${\rm Ca}_{1/3}$ MnO3 (LCMO) superlattices that have been grown with pulsed laser deposition (PLD) on ${\rm La}_{0.3}$ ${\rm Sr}_{0.7}$ ${\rm Al}_{0.65}$ ${\rm Ta}_{0.35}$ ${\rm O}_{3}$ (LSAT) substrates. X-ray reflectometry and scanning transmission electron microscopy (STEM) confirm the high structural quality of the films and flat and atomically sharp interfaces of the superlattices [...]
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2017-11-16
12:14
OpenAccess [PUBDB-2017-12047] Report/Journal Article
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Study of $\eta$ and dipion transitions in $\Upsilon(4S)$ decays to lower bottomonia
[BELLE-PREPRINT-2017-16; KEK-PREPRINT-2017-17; arXiv:1707.04973] ddc:530
We study hadronic transitions between bottomonium states using 496 fb$^{-1}$ data collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^{+}e^{-}$ collider. We measure: ${\cal B}(\Upsilon(4S)\to\pi^+\pi^-\Upsilon(1S))=(8.2\pm 0.5 {\rm(stat.)} \pm 0.4 {\rm(syst.)})\times10^{-5}$, ${\cal B}(\Upsilon(4S)\to\pi^+\pi^-\Upsilon(2S))=(7.9\pm 1.0 {\rm(stat.)} \pm 0.4 {\rm(syst.)})\times10^{-5}$, and ${\cal B}(\Upsilon(4S)\to\eta\Upsilon(1S))=(1.70\pm 0.23 {\rm(stat.)} \pm 0.08 {\rm(syst.)})\times10^{-4}$. [...]
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2017-11-16
11:58
OpenAccess [PUBDB-2017-12046] Report/Journal Article
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Evidence for Isospin Violation and Measurement of $CP$ Asymmetries in $B \to K^{\ast}(892) \gamma$
[BELLE-PREPRINT-2017-08; KEK-PREPRINT-2017-4; arXiv:1707.00394]
15th Conference on Flavor Physics and CP Violation, FPCP 2017, Meeting locationPrague, Czech Republic, 5 Jun 2017 - 9 Jun 20172017-06-052017-06-09 Physical review letters 119(19), 191802 (2017) [10.1103/PhysRevLett.119.191802]  GO
ddc:550
We report the first evidence for isospin violation in $B \to K^* \gamma$ and the first measurement of difference of $CP$ asymmetries between $B^+ \to K^{*+} \gamma$ and $B^0 \to K^{*0} \gamma$. This analysis is based on the data sample containing $772 \times 10^6 B\bar{B}$ pairs that was collected with the Belle detector at the KEKB energy-asymmetric $e^+ e^-$ collider. [...]
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2017-11-16
11:35
OpenAccess [PUBDB-2017-12040] Journal Article
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Time-resolved ultrafast x-ray scattering from an incoherent electronic mixture
ddc:530
Time-resolved ultrafast x-ray scattering from photoexcited matter is an emerging method to image ultrafast dynamics in matter with atomic-scale spatial and temporal resolutions. For a correct and rigorous understanding of current and upcoming imaging experiments, we present the theory of time-resolved x-ray scattering from an incoherent electronic mixture using quantum electrodynamical theory of light-matter interaction [...]
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2017-11-16
11:27
OpenAccess [PUBDB-2017-12039] Report/Journal Article
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Search for $\Lambda_c^+\to\phi p \pi^0$ and branching fraction measurement of $\Lambda_c^+\to K^-\pi^+ p \pi^0$
[BELLE-PREPRINT-2017-12; KEK-PREPRINT-2017-08; UCHEP-2017-06; arXiv:1707.00089] ddc:530
We have searched for the Cabibbo-suppressed decay $\Lambda_c^+\to\phi p\pi^0$ in $e^+e^-$ collisions using a data sample corresponding to an integrated luminosity of 915 $\rm fb^{-1}$. The data were collected by the Belle experiment at the KEKB $e^+e^-$ asymmetric-energy collider running at or near the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances. [...]
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2017-11-16
11:16
OpenAccess [PUBDB-2017-12038] Report/Journal Article
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Search for $CP$ Violation and Measurement of the Branching Fraction in the Decay $D^{0} \to K^0_S K^0_S$
[Belle-Preprint-2017-03; KEK-Preprint-2016-64; arXiv:1705.05966] ddc:550
We report a study of the decay $D^0 \to K^0_S K^0_S$ using 921~fb$^{-1}$ of data collected at or near the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The measured time-integrated CP asymmetry is $ A_{CP}(D^0 \to K^0_S K^0_S) = (-0.02 \pm 1.53 \pm 0.02 \pm 0.17) \%$ and the branching fraction is $\mathcal{B} (D^{0}\rightarrow K_{S}^{0}K_{S}^{0})$ = (1.32 $\pm$ 0.02 $\pm$ 0.04 $\pm$ 0.04) $\times$ 10$^{-4}$, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode ($D^0 \to K_S^0 \pi^0$) used in the analysis. [...]
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2017-11-15
09:36
DBCoverage [PUBDB-2017-12009] Journal Article
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Spiral scanning X-ray fluorescence computed tomography
Optics express 25(19), 23424 - 23436 (2017) [10.1364/OE.25.023424]  GO
ddc:530
canning X-ray fluorescence tomography was once considered impractical due to prohibitive measurement time requirements but is now common for investigating metal distributions within small systems. A recent look-ahead to the possibilities of 4$^{th}$-generation synchrotron light sources [J [...]
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2017-11-14
11:50
OpenAccess [PUBDB-2017-11953] Journal Article
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Measurements of top quark spin observables in $t\bar{t}$ events using dilepton final states in $\sqrt{s}$ = 8 TeV $pp$ collisions with the ATLAS detector
ddc:530
Measurements of top quark spin observables in $t\bar{t}$ events are presented based on 20.2 fb−1 of $\sqrt{s}$ = 8 TeV proton-proton collisions recorded with the ATLAS detector at the LHC. The analysis is performed in the dilepton final state, characterised by the presence of two isolated leptons (electrons or muons) [...]
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