439 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of GrazAT211 papers
- Graz University of TechnologyAT46 papers
- Austrian Academy of SciencesAT17 papers
- Centre National de la Recherche ScientifiqueFR16 papers
- University of ViennaAT16 papers
- Institute of High Energy PhysicsCN13 papers
- Justus-Liebig-Universität GießenDE13 papers
- Heidelberg UniversityDE11 papers
- European Southern ObservatoryCL8 papers
- GSI Helmholtz Centre for Heavy Ion ResearchDE7 papers
- Helmholtz-Zentrum Dresden-RossendorfDE7 papers
- Jožef Stefan InstituteSI7 papers
85 papers · 1 filter
Getting a handle on correlation functions
Gernot Eichmann
The central objects in a quantum field theory are its n-point correlation functions and matrix elements. Their structure is determined by Lorentz invariance and leads to tensor dec…
Sub-GeV dark matter and multi-decay signatures from dark showers at beam-dump experiments
Elias Bernreuther, Nicoline Hemme, Felix Kahlhoefer +2
In models of strongly-interacting dark sectors, the production of dark quarks at accelerators can give rise to dark showers with multiple dark mesons in the final state. If some of…
Timelike form factor for the anomalous process
Angel S. Miramontes, Gernot Eichmann, Reinhard Alkofer
The form factor for the anomalous process is calculated in the isospin limit for several values of the light current-quark mass (i.e., the…
Dark Sector Showers and Hadronisation in Herwig 7
Suchita Kulkarni, M. R. Masouminia, Simon Plätzer +1
We present a novel simulation of a strongly interacting dark sector also known as the Hidden Valley scenarios using angular ordered showers and the cluster hadronisation model in H…
Hidden-flavour four-quark states in the charm and bottom region
Joshua Hoffer, Gernot Eichmann, Christian S. Fischer
We discuss the spectrum and the internal composition of ground and excited four-quark states in the charm and bottom energy region. To this end we extend previous calculations with…
Wigner 6j symbols with gluon lines: completing the set of 6j symbols required for color decomposition
Stefan Keppeler, Simon Plätzer, Malin Sjodahl
We construct a set of Wigner 6j symbols with gluon lines (adjoint representations) in closed form, expressed in terms of similar 6j symbols with quark lines (fundamental representa…
Spinning Pairs: Supporting Quark-Pair Creation from Landau Gauge Green's Functions
Reinhard Alkofer, Felipe J. Llanes-Estrada, Alexandre Salas-Bernardez
Abundant phenomenology suggests that strong decays from relatively low-excitation hadrons into other hadrons proceed by the creation of a light quark-antiquark pair with zero total…
Dynamical Chiral Symmetry Breaking in Quantum Chromo Dynamics: Delicate and Intricate
Reinhard Alkofer
Dynamical Chiral Symmetry Breaking (DCSB) in Quantum Chromo Dynamics (QCD) for the light quarks is an indispensable concept for understanding hadron physics, i.e., the spectrum and…
Pole-fitting for complex functions: enhancing standard techniques by artificial-neural-network classifiers and regressors
S. Kaidisch, T. U. Hilger, A. Krassnigg +1
Motivated by a use case in theoretical hadron physics, we revisit an application of a pole-sum fit to dressing functions of a confined quark propagator. More precisely, we investig…
The manifestly gauge-invariant spectrum of the Minimal Supersymmetric Standard Model
Axel Maas, Philipp Schreiner
Formal field theory requires, even in the presence of a Brout-Englert-Higgs effect, to maintain manifest non-perturbative gauge invariance. The Fröhlich-Morchio-Strocchi mechanism…
Heavy baryon spectroscopy in a quark-diquark approach
A. Torcato, A. Arriaga, G. Eichmann +1
We report progress on calculations of the heavy-light baryons and and their excitations with using functional methods. We employ a covariant quark-diquark…
Restoring the Bloch-Nordsieck theorem in the electroweak sector of the standard model
Axel Maas, Franziska Reiner
The electroweak gauge symmetry cannot be broken in a literal sense due to Elitzur's theorem. Thus, asymptotic states need to be manifestly and non-perturbatively gauge-invariant wi…
The analytic structure of three-point functions from contour deformations
Markus Q. Huber, Wolfgang J. Kern, Reinhard Alkofer
We explore the analytic structure of three-point functions using contour deformations. This method allows continuing calculations analytically from the spacelike to the timelike re…
Strongly Interacting Dark Matter from Gauge Theory
Fabian Zierler, Suchita Kulkarni, Axel Maas +3
The stable hadronic bound states in a hidden new non-Abelian gauge sector provide interesting candidates for strongly-interacting Dark Matter (DM). A particular example are theorie…
Identifying Time Scales in Particle Production from Fields
Matthias Diez, Reinhard Alkofer, Christian Kohlfürst
Particle production through ultra-strong electric fields is a well-studied research field. Nevertheless, despite repeated attempts to relate the production rate within the field to…
Wigner 6j symbols for SU(N): Symbols with at least two quark-lines
Judith Alcock-Zeilinger, Stefan Keppeler, Simon Plätzer +1
We study a class of SU(N) Wigner 6j symbols involving two fundamental representations, and derive explicit formulae for all 6j symbols in this class. Our formulae express the 6j sy…
Long live The NMSSM!
Amit Adhikary, Rahool Kumar Barman, Biplob Bhattacherjee +3
We analyze the scenario within the Next to Minimal Supersymmetric Standard Model (NMSSM), where the lightest supersymmetric particle (LSP) is singlino-like neutralino. By systemati…
Colour Evolution and Infrared Physics
Simon Plätzer
We give a complete account of how soft gluon, massless quark, evolution equations in colour space originate, from a factorization into a hard cross section density operator and a s…
The Present and Future Status of Heavy Neutral Leptons
Asli M. Abdullahi, Pablo Barham Alzas, Brian Batell +42
The existence of non-zero neutrino masses points to the likely existence of multiple SM neutral fermions. When such states are heavy enough that they cannot be produced in oscillat…
Displaced fat-jets and tracks to probe boosted right-handed neutrinos in the model
Rojalin Padhan, Manimala Mitra, Suchita Kulkarni +1
We investigate the pair-production of Right-Handed Neutrinos (RHNs) via a boson and the detection prospects at the High-Luminosity run of the LHC (HL-LHC) and a future $…
Theory, phenomenology, and experimental avenues for dark showers: a Snowmass 2021 report
Guillaume Albouy, Jared Barron, Hugues Beauchesne +51
In this work, we consider the case of a strongly coupled dark/hidden sector, which extends the Standard Model (SM) by adding an additional non-Abelian gauge group. These extensions…
Elucidating the rho-meson's role as intermediate resonance in the time-like electromagnetic pion form factor
Reinhard Alkofer, Angel S. Miramontes, Helios Sanchis-Alepuz
Motivated by the planned measurements of the time-like electromagnetic proton form factors an exploratory study of the time-like electromagnetic pion form factor is presented in a…
Electromagnetic and strong isospin breaking in light meson masses
Ángel S. Miramontes, Reinhard Alkofer, Christian S. Fischer +1
We study electromagnetic as well as strong isospin breaking effects in the isospin mass splittings of light pseudoscalar and vector mesons. To this end we employ a coupled system o…
Heavy Neutrinos at the FCC-hh in the Model
Wei Liu, Suchita Kulkarni, Frank F. Deppisch
We investigate the potential of the 100 TeV future circular collider (FCC-hh) to probe heavy neutrinos. We concentrate in particular on heavy neutrino production via a …