B. Penning
A5073524455- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Quantum, superfluid, helium dynamics
- Scientific Research and Discoveries
- Particle Accelerators and Free-Electron Lasers
- Advanced Data Storage Technologies
- Laser-Plasma Interactions and Diagnostics
- Nuclear Physics and Applications
- International Science and Diplomacy
- Astronomy and Astrophysical Research
University of Zurich
2024-2025
Michigan United
2023-2024
University of Michigan–Ann Arbor
2021-2024
University of Edinburgh
2024
Campbell Collaboration
2023
Fermi National Accelerator Laboratory
2009-2022
University of Chicago
2012-2022
Brandeis University
2018-2022
University of Bristol
2017-2021
Lawrence Berkeley National Laboratory
2020
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
This document is the final report of ATLAS-CMS Dark Matter Forum, a forum organized by ATLAS and CMS collaborations with participation experts on theories Matter, to select minimal basis set dark matter simplified models that should support design early LHC Run-2 searches. A prioritized, compact benchmark proposed, accompanied studies parameter space these repository generator implementations. also addresses how apply Effective Field Theory formalism for collider searches present results...
This document a outlines set of simplified models for dark matter and its interactions with Standard Model particles. It is intended to summarize the main characteristics that these have when applied searches at LHC, provide number useful expressions reference. The list includes both s-channel t-channel scenarios. For s-channel, spin-0 spin-1 mediations are discussed, also realizations where Higgs particle provides portal between visible sectors. guiding principles underpinning proposed...
We describe observations of low energy excess (LEE) events, background events observed in all light dark matter direct detection calorimeters, and noise a transition edge sensor based two-channel silicon athermal phonon detector with 375 meV baseline resolution. measure two distinct LEE populations: “shared” multichannel pulse shape consistent substrate sub-eV that couple nearly exclusively to single channel significantly faster shape. These “singles” are occurring within the aluminum...
The SPICE/HeRALD collaboration is performing research and development to enable studies of sub-GeV dark matter models using a variety target materials. Here we report our recent progress on instrumenting superfluid He4 mass with transition-edge sensor based calorimeter detect both atomic signals (scintillation) quasiparticle (phonon roton) excitations. sensitivity HeRALD the critical "quantum evaporation" signal from quasiparticles requires us block film flow calorimeter. We have developed...
As the LHC luminosity is ramped up to 3 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex Notation="TeX">$\,\times 10^{34}~{\hbox {cm}}^{2}~s^{1}$</tex></formula> and beyond, high rates, multiplicities, energies of particles seen by detectors will pose a unique challenge. Only tiny fraction produced collisions can be stored offline immense real-time data reduction needed. An effective trigger system must maintain...
Dark matter is one of the main puzzles in fundamental physics and goal a diverse, multi-pronged research program. Underground astrophysical searches search for dark particles cosmos, either by interacting directly or searching annihilation. Particle colliders, contrast, might produce laboratory are able to probe all basic interactions. They sensitive low masses, provide complementary information at higher masses subject different systematic uncertainties. Collider therefore an important part...
The monojet search, looking for events involving missing transverse energy (E_{T}) plus one or two jets, is the most prominent collider dark matter search. We show that multijet searches, which look E_{T} more are significantly sensitive than search pseudoscalar- and scalar-mediated interactions. demonstrate this in context of a simplified model with pseudoscalar interaction explains excess GeV gamma rays observed by Fermi Large Area Telescope. searches already constrain interpretation much...
We discuss a novel signature of dark matter production at the LHC resulting from emission an additional Higgs boson in sector. The presence such is motivated simultaneously by need to generate masses particles sector and possibility relax constraints relic abundance opening up new annihilation channel. If decays into Standard Model states via small mixing with boson, one obtains characteristic large-radius jets association missing transverse momentum that can be used efficiently discriminate...
Superfluid $^{4}\mathrm{He}$ is a promising target material for direct detection of light ($<1\text{ }\text{ }\mathrm{GeV}$) dark matter. Possible signal channels available readout in this medium include prompt photons, triplet excimers, and roton phonon quasiparticles. The relative yield these signals has implications the sensitivity discrimination power superfluid matter detector. Using $16\text{ }{\mathrm{cm}}^{3}$ volume 1.75 K read out by six immersed photomultiplier tubes, we measured...
Theoretical and experimental techniques employed in dedicated searches for dark matter at hadron colliders are reviewed. Bounds from the 7 8 TeV proton-proton collisions LHC on interactions have been collected results interpreted. We review current status of Effective Field Theory picture with Standard Model. Currently, experiments stronger bounds operators leading to spin-dependent scattering than direct detection experiments, while probes more constraining spin-independent WIMP masses...
Results from the completed Phase 1 Upgrade of Compact Muon Solenoid (CMS) Level-1 Calorimeter Trigger are presented. The upgrade was performed in two stages, with first running 2015 for proton and heavy ion collisions final stage 2016 data taking. trigger has been fully commissioned used by CMS to collect over 43 fb−1 since start Run II Large Hadron Collider (LHC). new designed improve performance at high luminosity large number simultaneous inelastic per crossing (pile-up). For this purpose...
In this article we investigate the benefits of increasing maximum nuclear recoil energy analysed in dark matter (DM) direct detection experiments. We focus on elastic DM-nucleus interactions, and work within framework effective field theory (EFT) to describe scattering cross section. agreement with previous literature, show that an increased leads more stringent upper bounds section for EFT operators, especially those explicit momentum dependence. extend region interest (ROI) optimal values...
The CMS Level-1 calorimeter trigger is being upgraded in two stages to maintain performance as the LHC increases pile-up and instantaneous luminosity its second run. In first stage, improved algorithms including event-by-event corrections are used. New for heavy ion running have also been developed. higher granularity inputs a time-multiplexed approach allow position energy resolution. Data processing both of upgrade performed with new, Xilinx Virtex-7 based AMC cards.
We describe the design and expected performance of a Fast Tracker Trigger (FTK) system for ATLAS detector at Large Hadron Collider. The FTK is highly parallel hardware designed to operate Level 1 trigger output rate. It provide global tracks reconstructed in inner with resolution comparable full offline reconstruction as input 2 processing. based on associative memories pattern recognition fast FPGAs track reconstruction. dramatically improve isolation b-tagging little no dependencies...
The Compact Muon Solenoid (CMS) employs a sophisticated two-level online triggering system that has rejection factor of up to 105. Since the beginning Run II LHC, conditions CMS operates in have become increasingly challenging. centre-of-mass energy is now 13 TeV and instantaneous luminosity currently peaks at 1.5 ×1034 cm−2s−1. In order keep low physics thresholds trigger efficiently such conditions, been upgraded. A new architecture, Time Multiplexed Trigger (TMT) introduced which allows...
A portable monoenergetic 24 keV neutron source based on the $^{124}$Sb-$^9$Be photoneutron reaction and an iron filter has been constructed characterized. The coincidence of energy from SbBe low interaction cross-section with (mean free path up to 29 cm) makes pure specially suited shield against gamma rays $^{124}$Sb decays while letting through neutrons. To increase activity thus flux, a $>$1 GBq was produced by irradiating natural Sb metal pellet high flux thermal neutrons in nuclear...
Abstract A portable monoenergetic 24 keV neutron source based on the 124 Sb- 9 Be photoneutron reaction and an iron filter has been constructed characterized. The coincidence of energy from SbBe low interaction cross-section with (mean free path up to 29 cm) makes pure specially suited shield against gamma rays Sb decays while letting through neutrons. To increase activity thus flux, a >1 GBq was produced by irradiating natural metal pellet high flux thermal neutrons in nuclear reactor....
The SPICE/HeRALD collaboration is performing R&D to enable studies of sub-GeV dark matter models using a variety target materials. Here we report our recent progress on instrumenting superfluid $^4$He mass with transition-edge sensor based calorimeter detect both atomic signals (e.g. scintillation) and quasiparticle (phonon roton) excitations. sensitivity HeRALD the critical "quantum evaporation" signal from quasiparticles requires us block film flow calorimeter. We have developed...