Journal Article

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2020-04-09
10:28
OpenAccess [PUBDB-2020-01424] Report/Journal Article
et al
Moments of nucleon generalized parton distributions from lattice QCD simulations at physical pion mass
[arXiv:1908.10706]
We present results for the moments of nucleon isovector vector and axial generalized parton distribution functions computed within lattice QCD. Three ensembles of maximally twisted mass clover-improved fermions simulated with a physical value of the pion mass are analyzed. [...]
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2020-04-07
11:55
OpenAccess [PUBDB-2020-01405] Report/Journal Article
et al
A Decade of Multiwavelength Observations of the TeV Blazar 1ES 1215+303: Extreme Shift of the Synchrotron Peak Frequency and Long-term Optical–Gamma-Ray Flux Increase
[arXiv:2002.04119]
Blazars are known for their variability on a wide range of timescales at all wavelengths. Most studies of TeV gamma-ray blazars focus on short timescales, especially during flares. [...]
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2020-04-07
11:33
OpenAccess [PUBDB-2020-01400] Report/Journal Article
et al
Fermi Large Area Telescope Fourth Source Catalog
[arXiv:1902.10045]
We present the fourth Fermi Large Area Telescope catalog (4FGL) of γ-ray sources. Based on the first eight years of science data from the Fermi Gamma-ray Space Telescope mission in the energy range from 50 MeV to 1 TeV, it is the deepest yet in this energy range. [...]
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2020-04-07
11:09
OpenAccess [PUBDB-2020-01399] Report/Journal Article
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New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes
[arXiv:1911.06680]
Extreme high-frequency-peaked BL Lac objects (EHBLs) are blazars that exhibit extremely energetic synchrotron emission. They also feature nonthermal gamma-ray emission whose peak lies in the very high-energy (VHE, E > 100 GeV) range, and in some sources exceeds 1 TeV: this is the case for hard-TeV EHBLs such as 1ES 0229+200. [...]
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2020-04-07
10:17
arXiv [PUBDB-2020-01395] Report/Journal Article
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A search for dark matter in Triangulum II with the MAGIC telescopes
[arXiv:2003.05260]
We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 hours of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. [...]
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2020-04-07
09:53
OpenAccess [PUBDB-2020-01392] Report/Journal Article
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Cosmic-ray acceleration and escape from post-adiabatic supernova remnants
[arXiv:1909.08484]
Context. Supernova remnants are known to accelerate cosmic rays on account of their nonthermal emission of radio waves, X-rays, and gamma rays [...]
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2020-04-02
13:55
OpenAccess [PUBDB-2020-01355] Report/Journal Article

Impact of isolation and fiducial cuts on q$_T$ and N-jettiness subtractions
[arXiv:1911.08486; DESY-19-199; MIT-CTP/5158]
Kinematic selection cuts and isolation requirements are a necessity in experimental measurements for identifying prompt leptons and photons that originate from the hard-interaction process of interest. We analyze how such cuts affect the application of the $q_T$ and $N$-jettiness subtraction methods for fixed-order calculations. [...]
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2020-04-02
13:52
OpenAccess [PUBDB-2020-01354] Report/Journal Article
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Electromagnetic contribution to Σ - Λ mixing using lattice QCD + QED
[DESY-19-190]
Mixing in the Σ0–Λ0 system is a direct consequence of broken isospin symmetry and is a measure of both isospin-symmetry breaking as well as general SU(3)-flavor symmetry breaking. In this work we present a new scheme for calculating the extent of Σ0–Λ0 mixing using simulations in lattice QCD+QED and perform several extrapolations that compare well with various past determinations. [...]
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2020-04-02
11:43
OpenAccess [PUBDB-2020-01349] Report/Journal Article

Source terms for electroweak baryogenesis in the vev-insertion approximation beyond leading order
[DESY-19-182]
In electroweak baryogenesis the baryon asymmetry of the universe is created during the electroweak phase transition. The quantum transport equations governing the dynamics of the plasma particles can be derived in the vev-insertion approximation, which treats the vev-dependent part of the particle masses as a perturbation. [...]
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2020-04-02
11:39
OpenAccess [PUBDB-2020-01348] Report/Journal Article
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The geometry of SUSY enhancement
[DESY-19-177]
We provide a precise geometric picture that demystifies the phenomenon of supersymmetry enhancement along certain RG flows of four-dimensional field theories, recently discovered by Maruyoshi and Song. It applies to theories of arbitrary rank and it is based on a hyperkähler-structure restoration on the moduli space of solutions of (twisted) Hitchin systems, which underly the class-$ \mathcal{S} $ construction we use as an engineering tool. [...]
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