Publications (73)
On the Renormalization of the Minimal Supersymmetric Standard Model
Elisabeth Kraus, Markus Roth, Dominik Stockinger
The renormalization of the Minimal Supersymmetric Standard Model is discussed. In particular we focus on the soft-supersymmetry breaking sector of the MSSM and comment on non-renor…
Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy
The Pierre Auger Collaboration, Alexander Aab, Pedro Abreu +447
We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Au…
Measurement of the cosmic ray spectrum above eV using inclined events detected with the Pierre Auger Observatory
The Pierre Auger Collaboration, Alexander Aab, Pedro Abreu +461
A measurement of the cosmic-ray spectrum for energies exceeding eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\…
Solar-MACH: An open-source tool to analyze solar magnetic connection configurations
Jan Gieseler, Nina Dresing, Christian Palmroos +10
The Solar MAgnetic Connection HAUS tool (Solar-MACH) is an open-source tool completely written in Python that derives and visualizes the spatial configuration and solar magnetic co…
Validation of Spherical Born Approximation Sensitivity Functions for Measuring Deep Solar Meridional Flow
Vincent G. A. Böning, Markus Roth, Jason Jackiewicz +1
Accurate measurements of deep solar meridional flow are of vital interest for understanding the solar dynamo. In this paper, we validate a recently developed method for obtaining s…
Renormalization of the Minimal Supersymmetric Standard Model
Wolfgang Hollik, Elisabeth Kraus, Markus Roth +3
The renormalization of the Minimal Supersymmetric Standard Model (MSSM) is presented. We describe symmetry identities that constitute a framework in which the MSSM is completely ch…
Enhancing Neutron Measurement Accuracy with Bubble Detectors at Laser-Driven Neutron Sources
Stefan Scheuren, Maria Angeles Millán-Callado, Jonas Kohl +9
Bubble detectors are widely used to measure neutron flux from laser-driven sources employing a pitcher-catcher setup, due to their insensitivity to intense -ray backgrounds and…
Theano: A Python framework for fast computation of mathematical expressions
The Theano Development Team, Rami Al-Rfou, Guillaume Alain +110
Theano is a Python library that allows to define, optimize, and evaluate mathematical expressions involving multi-dimensional arrays efficiently. Since its introduction, it has bee…
The Giant Radio Array for Neutrino Detection (GRAND): Science and Design
GRAND Collaboration, Jaime Alvarez-Muniz, Rafael Alves Batista +48
The Giant Radio Array for Neutrino Detection (GRAND) is a planned large-scale observatory of ultra-high-energy (UHE) cosmic particles, with energies exceeding 10^8 GeV. Its goal is…
Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory
The Pierre Auger Collaboration, Alexander Aab, Pedro Abreu +448
The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared…
Verification of the helioseismic Fourier-Legendre analysis for meridional flow measurements
Markus Roth, Hans-Peter Doerr, Thomas Hartlep
Measuring the Sun's internal meridional flow is one of the key issues of helioseismology. Using the Fourier-Legendre analysis is a technique for addressing this problem. We validat…
Signal Model and Energy Reconstruction for the Radio Detection of Inclined Air Showers in the 50-200 MHz Frequency Band
Lukas Gülzow, Ralph Engel, Tim Huege +2
The radio emission of cosmic-ray air-showers changes significantly depending on parameters like signal frequency, magnetic field configuration and observing altitude. We use CoREAS…
Determination of fundamental asteroseismic parameters using the Hilbert transform
René Kiefer, Ariane Schad, Wiebke Herzberg +1
Context. Solar-like oscillations exhibit a regular pattern of frequencies. This pattern is dominated by the small and large frequency separations between modes. The accurate determ…
The energy spectrum of cosmic rays at the highest energies
Bruce R. Dawson, Ioana C. Maris, Markus Roth +7
One of several working groups established for this workshop was charged with examining results and methods associated with the UHECR energy spectrum. We summarize the results of ou…
Particle acceleration in the superwinds of starburst galaxies
Gustavo E. Romero, Ana Laura Müller, Markus Roth
Starbursts are galaxies undergoing massive episodes of star formation. The combined effect of stellar winds from hot stars and supernova explosions creates a high-temperature cavit…
Mass Composition Sensitivity of an Array of Water Cherenkov and Scintillation Detectors
Javier G. Gonzalez, Ralph Engel, Markus Roth
We consider a hybrid array composed of scintillation and water Cherenkov detectors designed to measure the cosmic ray primary mass composition at energies of about 1 EeV. We have d…
Comparison of the sidereal angular velocity of subphotospheric layers and small bright coronal structures during the declining phase of solar cycle 23
Amel Zaatri, Hubertus Woehl, Markus Roth +2
Context. We compare solar differential rotation of subphotospheric layers derived from local helioseismology analysis of GONG++ dopplergrams and the one derived from tracing small…
Search for dark matter in the hidden-photon sector with a large spherical mirror
The FUNK Experiment, :, Darko VeberiÄ +11
If dark matter consists of hidden-sector photons which kinetically mix with regular photons, a tiny oscillating electric-field component is present wherever we have dark matter. In…
Hidden Photon Dark Matter Search with a Large Metallic Mirror
Babette Döbrich, Kai Daumiller, Ralph Engel +4
If Dark Matter is composed of hidden-sector photons that kinetically mix with photons of the visible sector, then Dark Matter has a tiny oscillating electric field component. Its p…
Towards the Giant Radio Array for Neutrino Detection (GRAND): the GRANDProto300 and GRAND@Auger prototypes
GRAND Collaboration, Jaime Ãlvarez-Muniz, Rafael Alves Batista +118
The Giant Radio Array for Neutrino Detection (GRAND) is a proposed multi-messenger observatory of Ultra-High-Energy (UHE) particles of cosmic origin. Its main goal is to find the l…
Experimental observation of -delayed neutrons from Li as a way to study short-pulse laser-driven deuteron production
Andrea Favalli, Nevzat Guler, Daniela Henzlova +9
A short-pulse laser-driven deuteron beam is generated in the relativistic transparency regime and aimed at a beryllium converter to generate neutrons at the TRIDENT laser facility.…
QED corrections to the evolution of parton distributions
Markus Roth, Stefan Weinzierl
We study the systematic inclusion of QED corrections in the evolution of parton distributions. O(alpha) corrections modify the evolution equation for parton distributions. They int…
Ideas and Requirements for the Global Cosmic-Ray Observatory (GCOS)
Markus Ahlers, Ingo Allekotte, Jaime Alvarez-Muniz +136
After a successful kick-off meeting in 2021. two workshops in 2022 and 2023 on the future Global Cosmic-Ray Observatory (GCOS) focused mainly on a straw man design of the detector…
An upper bound from helioseismology on the stochastic background of gravitational waves
Daniel M. Siegel, Markus Roth
The universe is expected to be permeated by a stochastic background of gravitational radiation of astrophysical and cosmological origin. This background is capable of exciting osci…
Astro2020 Science White Paper: Synoptic Studies of the Sun as a Key to Understanding Stellar Astrospheres
Valentin Martinez Pillet, Frank Hill, Heidi Hammel +11
Ground-based solar observations provide key contextual data (i.e., the 'big picture') to produce a complete description of the only astrosphere we can study in situ: our Sun's heli…
Inversions for Deep Solar Meridional Flow Using Spherical Born Kernels
Vincent G. A. Böning, Markus Roth, Jason Jackiewicz +1
The solar meridional flow is a crucial ingredient in modern dynamo theory. Seismic estimates of this flow have, however, been contradictory in deeper layers below about $0.9\,R_\od…
The FUNK search for Hidden Photon Dark Matter in the eV range
Babette Döbrich, Kai Daumiller, Ralph Engel +9
We give a brief update on the search for Hidden Photon Dark Matter with FUNK. The experiment uses a large spherical mirror, which, if Hidden Photon Dark Matter exists in the access…
The Lateral Distribution Function of Shower Signals in the Surface Detector of the Pierre Auger Observatory
Markus Roth
The surface detector (SD) array of the southern Pierre Auger Observatory will consist of a triangular grid of 1600 water Cherenkov tanks with 1.5 km spacing. For zenith angles less…
High-Energy Galactic Cosmic Rays (Astro2020 Science White Paper)
Frank G. Schröder, Tareq AbuZayyad, Luis Anchordoqui +19
The origin of the highest energy Galactic cosmic rays is still not understood, nor is the transition to EeV extragalactic particles. Scientific progress requires enhancements of ex…
TIC65910228b: A single-transit discovery of a massive long-period warm Jupiter with TESS
Felipe I. Rojas, Rafael Brahm, MatÃas I. Jones +27
Context. Warm Jupiters are excellent case studies for the investigation of giant planet internal structures and formation theories. However, the sample of long-period transiting gi…
Using cosmic neutrinos to search for non-perturbative physics at the Pierre Auger Observatory
Luis A. Anchordoqui, Haim Goldberg, Dariusz Gora +4
The Pierre Auger (cosmic ray) Observatory provides a laboratory for studying fundamental physics at energies far beyond those available at colliders. The Observatory is sensitive n…
Meridional Circulation and Global Solar Oscillations
Markus Roth, Michael Stix
We investigate the influence of large-scale meridional circulation on solar p-modes by quasi-degenerate perturbation theory, as proposed by \cite{lavely92}. As an input flow we use…
The Giant Radio Array for Neutrino Detection (GRAND) Collaboration -- Contributions to the 39th International Cosmic Ray Conference (ICRC 2025)
Jaime Ãlvarez-Muñiz, Rafael Alves Batista, Aurélien Benoit-Lévy +133
The Giant Radio Array for Neutrino Detection (GRAND) is an envisioned observatory of ultra-high-energy particles of cosmic origin, with energies in excess of 100 PeV. GRAND uses la…
LUSIFER: a LUcid approach to SIx-FERmion production
Stefan Dittmaier, Markus Roth
LUSIFER is a Monte Carlo event generator for all processes e+e-->6fermions, which is based on the multi-channel Monte Carlo integration technique and employs the full set of tree-l…
A Model of the Response of Surface Detectors to Extensive Air Showers Based on Shower Universality
Maximilian Stadelmaier, Ralph Engel, Markus Roth +2
We present a full model of surface-detector responses to extensive air showers. The model is motivated by the principles of air-shower universality and can be applied to different…
Restoration of azimuthal symmetry of muon densities in extended air showers
Nicusor Arsene, Markus Roth, Octavian Sima
At ground level, the azimuthal distribution of muons in inclined Extensive Air Showers (EAS) is asymmetric, mainly due to geometric effects. Several EAS observables sensitive to th…
Calculation of rescaling factors and nuclear multiplication of muons in extensive air showers
Kevin Almeida Cheminant, Dariusz Góra, Nataliia Borodai +7
Recent results obtained from leading cosmic ray experiments indicate that simulations using LHC-tuned hadronic interaction models underestimate the number of muons in extensive air…
Six-fermion production at e+e- colliders
Stefan Dittmaier, Markus Roth
The class of six-fermion production processes at e+e- colliders comprises very interesting particle reactions, such as the production of top-quark pairs and of Higgs bosons in the…
An improved limit to the diffuse flux of ultra-high energy neutrinos from the Pierre Auger Observatory
The Pierre Auger Collaboration, Alexander Aab, Pedro Abreu +462
Neutrinos in the cosmic ray flux with energies near 1 EeV and above are detectable with the Surface Detector array of the Pierre Auger Observatory. We report here on searches throu…
Next-Generation Triggering: A Novel Event-Level Approach
Jelena Köhler, Aurélien Benoit-Lévy, Pablo Correa +6
Large-scale cosmic-ray detectors like the Giant Radio Array for Neutrino Detection (GRAND) are pushing the boundaries of our ability to identify air shower events. Existing trigger…
Estimating the solar meridional circulation by normal mode decomposition
Lars Krieger, Markus Roth, Oskar von der Luehe
The objective of this article is to use Fourier-Hankel decomposition as suggested earlier by Braun & Fan (1998) to estimate the integrated horizontal meridional flow velocity as a…
Absorption of high frequency oscillations and its relation to emissivity reduction
Matthias Waidele, Markus Roth, Gangadharan Vigeesh +1
Sunspots are known to be strong absorbers of solar oscillation modal power. The most convincing way to demonstrate this is done via Fourier-Hankel decomposition (FHD), where the lo…
Inference of solar rotation from perturbations of acoustic mode eigenfunctions
Ariane Schad, Markus Roth
Today's picture of the internal solar rotation rate profile results essentially from helioseismic analyses of frequency splittings of resonant acoustic waves. Here we present anoth…
Method for calculation of the beta exponent from the Heitler-Matthews model of hadronic air showers
Kevin Almeida Cheminant, Dariusz Gora, Nataliia Borodai +8
The number of muons in an air shower is a strong indicator of the mass of the primary particle and increases with a small power of the cosmic ray mass by the -exponent, $N_μ \…
GONG p-mode parameters through two solar cycles
René Kiefer, Rudi Komm, Frank Hill +2
We investigate the parameters of global solar p-mode oscillations, namely damping width , amplitude , mean squared velocity , energy , and energy supp…
The Direct Effect of Toroidal Magnetic Fields on Stellar Oscillations: An Analytical Expression for the General Matrix Element
René Kiefer, Ariane Schad, Markus Roth
Where is the solar dynamo located and what is its modus operandi? These are still open questions in solar physics. Helio- and asteroseismology can help answer them by enabling us t…
GRANDlib: A simulation pipeline for the Giant Radio Array for Neutrino Detection (GRAND)
GRAND Collaboration, Rafael Alves Batista, Aurélien Benoit-Lévy +112
The operation of upcoming ultra-high-energy cosmic-ray, gamma-ray, and neutrino radio-detection experiments, like the Giant Radio Array for Neutrino Detection (GRAND), poses signif…
Modelling the Radio Emission of Inclined Air Showers in the 50-200 MHz Frequency Band for GRAND
Lukas Gülzow, Tim Huege, Kumiko Kotera +3
The Giant Radio Array for Neutrino Detection (GRAND) is a distributed, sparse ground antenna array designed to detect the radio emission from highly inclined extensive air showers…
Simulation of up- and down-going neutrino induced showers at the site of the Pierre Auger Observatory
Dariusz Gora, Markus Roth, Alessio Tamburro
We present a study about the possibility to detect neutrino induced extensive air showers at the Pierre Auger Observatory. The Monte Carlo simulations performed take into account t…
Characterization of GaN:Si and ZnO:Ga for position-resolved fast timing applications
Julius Meyer, Joshua W. Cates, Woon-Seng Choong +7
We present the characterization of two fast, crystalline inorganic scintillators, silicon-doped gallium nitride (GaN:Si) and gallium-doped zinc oxide (ZnO:Ga), and compare their pe…
Strengthening of the f mode due to subsurface magnetic fields in simulations of convection
G. Kishore, Nishant K Singh, Petri Käpylä +1
Previous studies have found that localized strengthening of the f mode recedes the emergence of active regions on the Sun by one day to three days. To help interpret these observat…
The Pierre Auger Observatory: Contributions to the 33rd International Cosmic Ray Conference (ICRC 2013)
The Pierre Auger Collaboration, Alexander Aab, Pedro Abreu +495
Contributions of the Pierre Auger Collaboration to the 33rd International Cosmic Ray Conference, Rio de Janeiro, Brazil, July 2013
On Strengthening of the Solar f-mode Prior to Active Region Emergence Using the Fourier-Hankel Analysis
Matthias Waidele, Markus Roth, Nishant Singh +1
Recent results of Singh et al. (2016) show that the emergence of an active region (AR) can be seen in a strengthening of the f-mode power up to two days prior of the region's forma…
Renormalization of the Minimal Supersymmetric Standard Model
Wolfgang Hollik, Elisabeth Kraus, Markus Roth +3
The renormalization of the Minimal Supersymmetric Standard Model of electroweak interactions is presented to all orders of perturbation theory using the algebraic method. Special a…
Disentangling the Air Shower Components Using Scintillation and Water Cherenkov Detectors
Javier G. Gonzalez, Markus Roth, Ralph Engel
We consider a ground array of scintillation and water Cherenkov detectors with the purpose of determining the muon content of air showers. The different response characteristics of…
Road map for the tuning of hadronic interaction models with accelerator-based and astroparticle data
Johannes Albrecht, Julia Becker Tjus, Noah Behling +52
In high-energy and astroparticle physics, event generators play an essential role, even in the simplest data analyses. As analysis techniques become more sophisticated, e.g. based…
Stellar magnetic activity and variability of oscillation parameters - An investigation of 24 solar-like stars observed by Kepler
René Kiefer, Ariane Schad, Guy Davies +1
Context. The Sun and solar-like stars undergo activity cycles for which the underlying mechanisms are not well understood. The oscillations of the Sun are known to vary with its ac…
The PLATO Mission
Heike Rauer, Conny Aerts, Juan Cabrera +842
PLATO (PLAnetary Transits and Oscillations of stars) is ESA's M3 mission designed to detect and characterise extrasolar planets and perform asteroseismic monitoring of a large numb…
Measurement of the UHECR energy spectrum using data from the Surface Detector of the Pierre Auger Observatory
Markus Roth
At the southern site of the Pierre Auger Observatory, which is close to completion, an exposure that significantly exceeds the largest forerunner experiments has already been accum…
Recent Developments in Helioseismic Analysis Methods and Solar Data Assimilation
Ariane Schad, Laurene Jouve, Tom L. Duvall +2
We review recent advances and results in enhancing and developing helioseismic analysis methods and in solar data assimilation. In the first part of this paper we will focus on sel…
High-energy processes in starburst-driven winds
Ana Laura Müller, Gustavo E. Romero, Markus Roth
Starburst galaxies generate large-scale winds powered by the activity in the star-forming regions located in the galactic disks. Fragmentation of the disk produced by the outbreak…
Updated comparison of the UHECR energy spectra measured by the Pierre Auger Observatory and the Telescope Array
Douglas R. Bergman, Toshihiro Fujii, Kozo Fujisue +8
The Pierre Auger and Telescope Array joint Working Group on the UHECR energy spectrum was established in 2012 to analyze energy scale uncertainties in both experiments and to in ve…
The Giant Radio Array for Neutrino Detection (GRAND) Collaboration -- Contributions to the 38th International Cosmic Ray Conference (ICRC 2023)
GRAND Collaboration, Rafael Alves Batista, Aurélien Benoit-Lévy +96
The Giant Radio Array for Neutrino Detection (GRAND) is an envisioned observatory of ultra-high-energy particles of cosmic origin, with energies in excess of 100 PeV. GRAND uses la…
Development of an Autonomous Detection-Unit Self-Trigger for GRAND
Pablo Correa, Jean-Marc Colley, Tim Huege +5
One of the major challenges for the radio detection of extensive air showers, as encountered by the Giant Radio Array for Neutrino Detection (GRAND), is the requirement of an auton…
Neutron Production in Simulations of Extensive Air Showers
Martin Schimassek, Ralph Engel, Alfredo Ferrari +3
Although the electromagnetic and muonic components of extensive air showers have been studied in great detail, no comprehensive simulation study of the neutron component is availab…
A new look at sunspot formation using theory and observations
Illa R. Losada, Jörn Warnecke, Kolja Glogowski +4
Sunspots are of basic interest in the study of the Sun. Their relevance ranges from them being an activity indicator of magnetic fields to being the place where coronal mass ejecti…
The muon deficit problem: a new method to calculate the muon rescaling factors and the Heitler-Matthews beta exponent
Kevin Almeida Cheminant, Dariusz Góra, Nataliia Borodai +8
Simulations of extensive air showers using current hadronic interaction models predict too small numbers of muons compared to events observed in the air-shower experiments, which i…
Muon number rescaling in simulations of air showers
Dariusz Góra, Nataliia Borodai, Ralph Engel +7
The number of muons in extensive air showers predicted using LHC-tuned hadronic interaction models, such as EPOS-LHC and QGSJetII-04, is smaller than observed in showers recorded b…
Online Charge Measurement for Petawatt Laser-Driven Ion Acceleration
Laura D. Geulig, Lieselotte Obst-Huebl, Kei Nakamura +14
Laser-driven ion beams have gained considerable attention for their potential use in multidisciplinary research and technology. Pre-clinical studies into their radiobiological effe…
On the feasibility of employing solar-like oscillators as detectors for the stochastic background of gravitational waves
Daniel M. Siegel, Markus Roth
We present a hydrodynamic model that describes excitation of linear stellar oscillations by a stochastic background of gravitational waves (SBGW) of astrophysical and cosmological…
The Giant Radio Array for Neutrino Detection (GRAND) Collaboration -- Contributions to the 10th International Workshop on Acoustic and Radio EeV Neutrino Detection Activities (ARENA 2024)
Rafael Alves Batista, Aurélien Benoit-Lévy, Teresa Bister +121
This is an index of the contributions by the Giant Radio Array for Neutrino Detection (GRAND) Collaboration to the 10th International Workshop on Acoustic and Radio EeV Neutrino De…
The Effect of Toroidal Magnetic Fields on Solar Oscillation Frequencies
René Kiefer, Markus Roth
Solar oscillation frequencies change with the level of magnetic activity. Localizing subsurface magnetic field concentrations in the Sun with helioseismology will help us to unders…
Sensitivity Kernels for Flows in Time-Distance Helioseismology: Extension to Spherical Geometry
Vincent G. A. Böning, Markus Roth, Wolfgang Zima +2
We extend an existing Born approximation method for calculating the linear sensitivity of helioseismic travel times to flows from Cartesian to spherical geometry. This development…