Preprints

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2019-06-20
13:20
OpenAccess [PUBDB-2019-02521] Preprint/Report
et al
Chapter B: Theory status of Z-boson physics
[DESY-18-122]
 GO
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2019-06-18
10:35
OpenAccess [PUBDB-2019-02490] Preprint/Report
et al
Three loop heavy quark form factors and their asymptotic behavior
[DESY-19-096, DO-TH 19/09, SAGEX-2019-13]
 GO
A summary of the calculation of the color-planar and complete light quark contributions to the massive three-loop form factors is presented. Here a novel calculation method for the Feynman integrals is used, solving general uni-variate first order factorizable systems of differential equations. [...]
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2019-06-13
11:33
OpenAccess [PUBDB-2019-02473] Preprint/Report
et al
Non-thermal emission from the reverse shock of the youngest galactic Supernova remnant G1.9+0.3
[arXiv:1906.02725]
 GO
Context. The youngest Galactic supernova remnant G1.9+0.3 is an interesting target for next generation gamma-ray observatories. [...]
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ddc:520
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2019-06-12
18:49
OpenAccess [PUBDB-2019-02471] Preprint/Report

Localization of 4d $\mathcal{N} = 1$ theories on $\mathbb{D}^2 \times \mathbb{T}^2$
[arXiv:1906.02051]
 GO
We consider 4d $\mathcal{N} = 1$ gauge theories with R-symmetry on a hemisphere times a torus. We apply localization techniques to evaluate the exact partition function through a cohomological reformulation of the supersymmetry transformations [...]
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2019-06-11
10:58
OpenAccess [PUBDB-2019-02454] Preprint/Report

The Different Regimes of Axion Gauge Field Inflation
[arXiv:1905.11372; DESY-19-089]
 GO
In axion gauge field inflation an axion-like particle driving cosmic inflation is coupled to the Chern-Simons density of an Abelian or non-Abelian gauge group. In the case of a non-Abelian gauge group, this can lead to the formation of a stable, homogeneous and isotropic gauge field background. [...]
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2019-06-11
10:48
OpenAccess [PUBDB-2019-02452] Preprint/Report

Relativistic bubble collisions -- a closer look
[arXiv:1906.02588; DESY-19-102]
 GO
We study scalar bubble collisions in first-order phase transitions focusing on the relativistic limit. We propose 'trapping equation' which describes the wall behavior after collision, and test it with numerical simulations in several setups. [...]
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2019-06-11
10:44
OpenAccess [PUBDB-2019-02449] Preprint/Report
et al
Production of Z-bosons in the parton branching method
[arXiv:1906.00919; DESY-19-087]
 GO
Transverse Momentum Dependent (TMD) parton distributions obtained from the Parton Branching (PB) method are combined with next-to-leading-order (NLO) calculations of Drell-Yan (DY) production. We apply the MCatNLO method for the hard process calculation and matching with the PB TMDs. [...]
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2019-06-11
10:42
OpenAccess [PUBDB-2019-02448] Preprint/Report
et al
Vacuum Instabilities in the N2HDM
[arXiv:1905.10234; DESY-19-085; KA-TP-07-2019]
 GO
The Higgs sector of the Next-to-Minimal Two-Higgs-Doublet Model (N2HDM) is obtained from the Two-Higgs-Doublet Model (2HDM) containing two complex Higgs doublets, by adding a real singlet field. In this paper, we analyse the vacuum structure of the N2HDM with respect to the possibility of vacuum instabilities. [...]
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2019-06-11
09:59
OpenAccess [PUBDB-2019-02447] Preprint/Report
et al
Baryogenesis from axion inflation
[arXiv:1905.13318; DESY-19-084]
 GO
The coupling of an axion-like particle driving inflation to the Standard Model particle content through a Chern-Simons term generically sources a dual production of massless helical gauge fields and chiral fermions. We demonstrate that the interplay of these two components results in a highly predictive baryogenesis model, which requires no further ingredients beyond the Standard Model. [...]
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2019-06-11
09:57
OpenAccess [PUBDB-2019-02446] Preprint/Report

The Effective Field Theory of Large Scale Structure at Three Loops
[arXiv:1906.00997; DESY-19-094]
 GO
We study the power spectrum of dark matter density fluctuations in the framework of the Effective Field Theory of Large Scale Structures (EFTofLSS) up to three loop orders. In principle, several counter-terms may be needed to handle the short-distance sensitivity in perturbation theory. [...]
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