Babette Döbrich
A5009450739- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Computational Physics and Python Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Electrodynamics and Casimir Effect
- CCD and CMOS Imaging Sensors
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Random lasers and scattering media
- Radiation Detection and Scintillator Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Black Holes and Theoretical Physics
- Superconducting and THz Device Technology
- Experimental and Theoretical Physics Studies
- Physics of Superconductivity and Magnetism
- Muon and positron interactions and applications
- Quantum Information and Cryptography
- Age of Information Optimization
European Organization for Nuclear Research
2015-2024
Max Planck Institute for Physics
2018-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2017-2024
Roma Tre University
2024
Centre National de la Recherche Scientifique
2023-2024
Aix-Marseille Université
2023-2024
UCLouvain
2022-2023
Joint Institute for Nuclear Research
2020
Karlsruhe Institute of Technology
2020
Campbell Collaboration
2017-2018
The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO look for axions or axion-like particles (ALPs) originating in the Sun via Primakoff conversion of solar plasma photons. In terms signal-to-noise ratio, about 4–5 orders magnitude more sensitive than CAST, currently most powerful helioscope, reaching sensitivity to axion-photon couplings down few × 10−12 GeV−1 and thus probing large fraction unexplored ALP parameter space....
of the Technical Design Report for second stage "Any Light Particle Search" (ALPS-II) at DESY as submitted to PRC in August 2012 and reviewed November 2012.ALPS-II is a "Light Shining through Wall" experiment which searches photon oscillations into weakly interacting sub-eV particles.These are often predicted by extensions Standard Model motivated astrophysical phenomena.The first phases ALPS-II project were approved management on February 21st, 2013.
With their high beam energy and intensity, existing near-future proton dumps provide an excellent opportunity to search for new very weakly coupled particles in the MeV GeV mass range. One particularly interesting example is a so-called axion-like particle (ALP), i.e. pseudoscalar two photons. The challenge reliably calculate production of from interactions composite objects, target atoms. In this work we argue that Primakoff ALPs proceeds momentum range where rates angular distributions can...
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at weak scale. When produced experiments such as Large Hadron Collider (LHC) CERN, these long-lived (LLPs) decay far from interaction vertex of primary proton-proton collision. Such LLP signatures distinct those promptly decaying targeted by majority searches for new physics LHC, often requiring customized techniques identify, example, significantly displaced vertices, tracks with...
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around world to discuss exciting developments in large-scale atom interferometer (AI) prototypes and their potential for detecting ultralight dark matter gravitational waves. primary objective was lay groundwork an international TVLBAI proto-collaboration. collaboration aims unite researchers different institutions strategize...
Dark sectors, consisting of new, light, weakly-coupled particles that do not interact with the known strong, weak, or electromagnetic forces, are a particularly compelling possibility for new physics. Nature may contain numerous dark each their own beautiful structure, distinct particles, and forces. This review summarizes physics motivation sectors exciting opportunities experimental exploration. It is summary Intensity Frontier subgroup "New, Light, Weakly-coupled Particles" Community...
We review the physics potential of a next generation search for solar axions: International Axion Observatory (IAXO) . Endowed with sensitivity to discover axion-like particles (ALPs) coupling photons as small gaγ∼ 10−12 GeV−1, or electrons gae∼10−13, IAXO has find QCD axion in 1 meV∼1 eV mass range where it solves strong CP problem, can account cold dark matter Universe and be responsible anomalous cooling observed number stellar systems. At same time, will have enough detect lower axions...
A bstract The exploration of long-lived particles in the MeV-GeV region is a formidable task but it may provide us unique access to dark sectors. Fixed-target facilities with sufficiently energetic and intense proton beams are an ideal tool for this challenge. In work we show that production rate Axion-Like-Particles (ALPs) coupled pre-dominantly photons receives significant contribution from daughter-photons secondary π 0 η mesons created shower. We carefully compare PYTHIA simulated...
A bstract This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in Sun, with unprecedented sensitivity. BabyIAXO conceived test all subsystems (magnet, optics detectors) relevant scale final system thus serve as prototype IAXO, but same time fully-fledged physics reach itself, potential discovery....
A bstract We present results of the Relic Axion Dark-Matter Exploratory Setup (RADES), a detector which is part CERN Solar Telescope (CAST), searching for axion dark matter in 34.67 μ eV mass range. radio frequency cavity consisting 5 sub-cavities coupled by inductive irises took physics data inside CAST dipole magnet first time using this filter-like haloscope geometry. An exclusion limit with 95% credibility level on axion-photon coupling constant g aγ ≳ 4 × 10 − 13 GeV 1 over range 34 ....
The CAST-CAPP axion haloscope, operating at CERN inside the CAST dipole magnet, has searched for axions in 19.74 $\mu$eV to 22.47 mass range. detection concept follows Sikivie haloscope principle, where Dark Matter convert into photons within a resonator immersed magnetic field. is an array of four individual rectangular cavities inserted strong phase-matched maximize sensitivity. Here we report on data acquired 4124 h from 2019 2021. Each cavity equipped with fast frequency tuning mechanism...
Abstract Kaon physics is at a turning point – while the rare-kaon experiments NA62 and KOTO are in full swing, end of their lifetime approaching future experimental landscape needs to be defined. With HIKE, KOTO-II LHCb-Phase-II on table under scrutiny, it very good moment time take stock contemplate about opportunities these theoretical developments provide for particle coming decade beyond. This paper provides compact summary talks discussions from Kaons@CERN 2023 workshop, held September CERN.
We update the globular cluster bound on massive (ma up to a few 100 keV) axion-like particles (ALP) interacting with photons. The production of such in stellar core is dominated by Primakoff γ+Ze→Ze+a and photon coalescence process γ+γ→a. latter, which predominant at high masses, was not included previous estimations. Furthermore, we account for possibility that axions decay inside core, non-negligible effect masses couplings are considering here. Consequently, our result modifies...
We propose, design and construct a variant of the conventional axion haloscope concept that could be competitive in search for dark matter axions masses decade 10–100 μeV. Theses are located somewhat above mass range which existing experiments have reached sensitivity to benchmark QCD models. Our consists an array small microwave cavities connected by rectangular irises, arrangement commonly used radio-frequency filters. The size unit cavity determines main resonant frequency, while...
New light pseudoscalars, such as axion-like particles, appear in many well-motivated extensions of the Standard Model and provide an exciting target for present future experiments. We study experimental sensitivity particles by revising CHARM exclusion contour, updating bounds from LHCb presenting prospects NA62 SHiP. first consider a simplified model pseudoscalar $A$ then propose model-independent approach applicable to any spin-0 boson enough be produced B-meson decays. As illustration, we...
The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances quantum technologies have led to a plethora high-precision sensors and strategies for ultralight ($<10\,$eV) bosonic that can be described by an oscillating classical, largely coherent field. This white paper focuses on searches wavelike scalar vector candidates.
A bstract Proton beam dump experiments are among the most promising strategies to search for light and feebly interacting states such as axion-like particles (ALPs). The interpretation of these is however complicated by wide range ALP models multitude different production decay channels that can induce observable signals. Here we propose a new approach this problem separating calculation constraints projected sensitivities into model-independent model-dependent parts. former rely on...
A sample of 3984 candidates the K+→π+γγ decay, with an estimated background 291±14 events, was collected by NA62 experiment at CERN during 2017–2018. In order to describe observed di-photon mass spectrum, next-to-leading contribution in chiral perturbation theory found be necessary. The decay branching ratio full kinematic range is measured (9.61±0.17)×10−7. first search for production and prompt axion-like particle gluon coupling process K+→π+a, a→γγ also reported.
A bstract measurement of the $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:mi>π</mml:mi> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> decay by NA62 experiment at CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to beamline detectors, a higher instantaneous beam...
Standard Model extensions often predict low‐mass and very weakly interacting particles, such as the axion. A number of small‐scale experiments at intensity/precision frontier are actively searching for these elusive complementing searches physics beyond colliders. Whilst a next generation will give access to huge unexplored parameter space, discovery would have tremendous impact on our understanding fundamental physics.
A bstract RADES (Relic Axion Detector Exploratory Setup) is a project with the goal of directly searching for axion dark matter above 30 μ eV scale employing custom-made microwave filters in magnetic dipole fields. Currently taking data at LHC CAST experiment. In long term, cavities are envisioned to take BabyIAXO magnet. this article we report on modelling, building and characterisation an optimised microwave-filter design alternating irises that exploits maximal coupling axions while being...