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2018-02-14
14:53
[PUBDB-2018-01181] Contribution to a conference proceedings

IceCube: Astrophysics results
17th International Workshop on Neutrino Telescopes, Meeting locationVenezia, Italy, 13 Mar 2017 - 17 Mar 20172017-03-132017-03-17 307, PoS(NEUTEL2017)059 (2017)

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2018-02-14
14:46
OpenAccess [PUBDB-2018-01180] Report/Contribution to a conference proceedings

High-Energy Neutrino Astronomy: where do we stand, where do we go?
[arXiv:1711.08266]
50 years Baksan Laboratory, Meeting locationBaksan, Russia, 22 Nov 2017 - 22 Nov 20172017-11-222017-11-22 20 pp. (2017) [10.3204/PUBDB-2018-01180]  GO
With the identification of a diffuse flux of astrophysical ('cosmic') neutrinos in the TeV-PeV energy range, IceCube has opened a new window to the Universe. However, the corresponding cosmic landscape is still uncharted: so far, the observed flux does not show any clear association with known source classes. [...]
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2018-02-13
14:50
OpenAccess [PUBDB-2018-01172] Dissertation / PhD Thesis
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Measurement of the fiducial differential Higgs cross-section with respect to pT using thediphoton decay channel atps = 8TeV with ATLAS
191 pp. (2018) [10.3204/PUBDB-2018-01172] = Dissertation, University of Hamburg, 2017  GO
AbstractThis thesis presents a measurement of the fiducial differential cross-section with respect to pT of Higgs boson production, using the diphoton decay channel. Theanalysis uses 20:3 fb-1 of proton-proton collision data at a centre-of-mass energy of 8TeV taken with the ATLAS detector in the year 2012. [...]
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2018-02-13
10:22
[PUBDB-2018-01168] Journal Article

FMFT: fully massive four-loop tadpoles
ddc:004
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2018-02-12
16:43
OpenAccess [PUBDB-2018-01167] Journal Article
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Pion vector form factor from lattice QCD at the physical point
ddc:530
We present an investigation of the electromagnetic pion form factor, $F_{\pi}(Q^2)$, at small values of the four-momentum transfer $Q^2 (\lesssim 0.25$ $GeV^2$), based on the gauge configurations generated by the European Twisted Mass Collaboration with $N_f = 2$ twisted-mass quarks at maximal twist including a clover term. Momentum is injected using nonperiodic boundary conditions and the calculations are carried out at a fixed lattice spacing $(a \simeq 0.09 fm)$ and with pion masses equal to its physical value, 240 MeV and 340 MeV. [...]
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2018-02-12
16:37
OpenAccess [PUBDB-2018-01166] Journal Article
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Conformal Dimensions via Large Charge Expansion
ddc:550
We construct an efficient Monte Carlo algorithm that overcomes the severe signal-to-noise ratio problems and helps us to accurately compute the conformal dimensions of large-$Q$ fields at the Wilson-Fisher fixed point in the $O$(2) universality class. Using it, we verify a recent proposal that conformal dimensions of strongly coupled conformal field theories with a global $U$(1) charge can be obtained via a series expansion in the inverse charge 1/$Q$. [...]
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2018-02-12
16:14
Embargoed OpenAccess [PUBDB-2018-01165] Journal Article
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Extragalactic diffuse γ-rays from dark matter annihilation: revised prediction and full modelling uncertainties
ddc:530
Recent high-energy data from $Fermi$-LAT on the diffuse $\gamma$-ray background have been used to set among the best constraints on annihilating TeV cold dark matter candidates. In order to assess the robustness of these limits, we revisit and update the calculation of the isotropic extragalactic $\gamma$-ray intensity from dark matter annihilation. [...]
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2018-02-12
16:05
OpenAccess [PUBDB-2018-01164] Report/Journal Article
; ; ; et al
Computing the nucleon charge and axial radii directly at $Q^2=0$ in lattice QCD
[arXiv:1711.11385; DESY-17-203] ddc:530
We describe a procedure for extracting momentum derivatives of nucleon matrix elements on the lattice directly at $Q^2=0$. This is based on the Rome method for computing momentum derivatives of quark propagators. [...]
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2018-02-12
08:27
OpenAccess [PUBDB-2018-01147] Report
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Electron and photon reconstruction and performance in ATLAS using a dynamical, topological cell clustering-based approach
[ATL-PHYS-PUB-2017-022]
This note presents the reconstruction of electrons and photons in ATLAS using a dynamic,topological cell clustering-based approach. This new technique allows for improved meas-urements of electron and photon energies, particularly in situations where an electron radiatesa bremsstrahlung photon, or a photon converts to an electron-positron pair. [...]
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2018-02-08
16:31
arXiv [PUBDB-2018-01142] Report/Journal Article
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On Radiation Emission from a Microbunched Beam with Wavefront Tilt and its Experimental Observation
[DESY-17-093; arXiv:1706.10185] ddc:530
In this paper we compare experimental observations and theory of radiation emission from a microbunched beam with microbunching wavefront tilt with respect to the direction of motion. The theory refers to the work [1], which predicts, in this case, exponential suppression of coherent radiation along the kicked direction. [...]
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