Preprints

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2017-08-21
15:36
arXiv [PUBDB-2017-09611] Preprint/Report
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CP-violation for Electroweak Baryogenesis from Dynamical CKM Matrix
[DESY-17-094]
The CKM matrix can be the source of CP-violation for electroweak baryogenesis if Yukawa couplings vary at the same time as the Higgs is acquiring its vacuum expectation value, offering new avenues for electroweak baryogenesis. These ideas apply if the mechanism explaining the flavour structure of the Standard Model is connected to electroweak symmetry breaking. [...]

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2017-08-14
10:24
arXiv [PUBDB-2017-09197] Preprint
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Supersymmetric field theories and geometric Langlands: The other side of the coin
This note announces results on the relations between the approach of Beilinson and Drinfeld to the geometric Langlands correspondence based on conformal field theory, the approach of Kapustin and Witten based on $N=4$ SYM, and the AGT-correspondence. The geometric Langlands correspondence is described as the Nekrasov-Shatashvili limit of a generalisation of the AGT-correspondence in the presence of surface operators. [...]

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2017-08-09
10:01
arXiv [PUBDB-2017-08980] Preprint/Report
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Stellar Recipes for Axion Hunters
[DESY 17-116]
There are a number of observational hints from astrophysics which point to the existence of stellar energy losses beyond the ones accounted for by neutrino emission. These excessive energy losses may be explained by the existence of a new sub-keV mass pseudoscalar Nambu--Goldstone boson with tiny couplings to photons, electrons, and nucleons. [...]
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2017-07-18
17:46
arXiv [PUBDB-2017-07911] Preprint/Report

FMFT: Fully Massive Four-loop Tadpoles
[DESY-17-098; arXiv:1707.01710]
We present FMFT - a package written in FORM that evaluates four-loop fully massive tadpole Feynman diagrams. It is a successor of the MATAD package that has been successfully used to calculate many renormalization group functions at three-loop order in a wide range of quantum field theories especially in the Standard Model. [...]

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2017-07-18
17:44
arXiv [PUBDB-2017-07908] Preprint/Report
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Seven Lessons from Manyfield Inflation in Random Potentials
[DESY-17-082; arXiv:1706.03774]
We study inflation in models with many interacting fields subject to randomly generated scalar potentials. We use methods from non-equilibrium random matrix theory to construct the potentials and an adaption of the transport method to evolve the two-point correlators during inflation. [...]

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2017-07-18
17:37
arXiv [PUBDB-2017-07905] Preprint/Report

Framework for evolution in double parton scattering
[DESY-17-097; arXiv:1707.00894]
Double parton scattering (DPS) describes two colliding hadrons having interactions in the form of two hard processes, each initiated by a separate pair of partons. Just as for single parton scattering, the resummation of soft gluon exchange gives rise to a soft function, which is a necessary ingredient for obtaining rapidity evolution equations. [...]

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2017-07-17
14:59
OpenAccess [PUBDB-2017-07775] Preprint/Report
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2D CFT blocks for the 4D class $\mathcal{S}_k$ theories
[DESY-17-029; MITP-17-012; arXiv:1703.00736]
 GO
This is the first in a series of papers on the search for the 2D CFT description of a large class of 4D $\mathcal{N} = 1$ gauge theories. Here, we identify the 2D CFT symmetry algebra and its representations, namely the conformal blocks of the Virasoro/W-algebra, that underlie the 2D theory and reproduce the Seiberg-Witten curves of the $\mathcal{N} = 1$ gauge theories. [...]
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2017-07-17
14:53
OpenAccess [PUBDB-2017-07773] Preprint
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Investigations into the impact of locally modified sensor architectures on the detection efficiency of silicon micro-strip sensors
ddc:610
The High Luminosity Upgrade of the LHC will require the replacement of the Inner Detector of ATLAS with the Inner Tracker (ITk) in order to cope with higher radiation levels and higher track densities. Prototype silicon strip detector modules are currently developed and their performance is studied in both particle test beams and X-ray beams [...]
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2017-07-17
12:27
OpenAccess [PUBDB-2017-07765] Preprint/Report
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Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at $\sqrt{s} = 13$ TeV
[CMS-EXO-16-026; CERN-EP-2017-125; arXiv:1706.08578]
 GO
A search for physics beyond the standard model in the final state with two same-flavour leptons (electrons or muons) and two quarks produced in proton-proton collisions at $\sqrt{s} = 13$ TeV is presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3 fb$^{-1}$ [...]
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2017-07-17
12:21
OpenAccess [PUBDB-2017-07761] Preprint/Report
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Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at $\sqrt{s} = 13$ TeV
[CMS-HIG-16-041; CERN-EP-2017-123; arXiv:1706.09936]
 GO
Properties of the Higgs boson are measured in the H $\to$ ZZ $\to$ 4$\ell (\ell = e, \mu)$ decay channel. A data sample of proton-proton collisions at $\sqrt{s} = 13$ TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 35.9 inverse femtobarns is used. [...]
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