scholarly journals Probing energetic light dark matter with multi-particle tracks signatures at DUNE

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Albert De Roeck ◽  
Doojin Kim ◽  
Zahra Gh. Moghaddam ◽  
Jong-Chul Park ◽  
Seodong Shin ◽  
...  
Keyword(s):  
Dark Matter ◽  
Liquid Argon ◽  
Sensitivity Study ◽  
Particle Identification ◽  
Dark Sector ◽  
Final State ◽  
Signal Sensitivity ◽  
The One ◽  
Neutrino Experiments ◽  
Time Projection

Abstract The search for relativistic scattering signals of cosmogenic light dark matter at terrestrial detectors has received increasing attention as an alternative approach to probe dark-sector physics. Large-volume neutrino experiments are well motivated for searches of dark matter that interacts very weakly with Standard Model particles and/or that exhibits a small incoming flux. We perform a dedicated signal sensitivity study for a detector similar to the one proposed by the DUNE Collaboration for cosmogenic dark-matter signals resulting from a non-minimal multi-particle dark-sector scenario. The liquid argon time projection chamber technology adopted for the DUNE detectors is particularly suited for searching for complicated signatures owing to good measurement resolution and particle identification, as well as dE/dx measurements to recognize merged tracks. Taking inelastic boosted dark matter as our benchmark scenario that allows for multiple visible particles in the final state, we demonstrate that the DUNE far detectors have a great potential for probing scattering signals induced by relativistic light dark matter. Detector effects and backgrounds have been estimated and taken into account. Model-dependent and model-independent expected sensitivity limits for a DUNE-like detector are presented.

scholarly journals Evaluation of Portable Acceleration Solutions for LArTPC Simulation Using Wire-Cell Toolkit

2021 ◽  
Vol 251 ◽  
pp. 03032
Author(s):  
Haiwang Yu ◽  
Zhihua Dong ◽  
Kyle Knoepfel ◽  
Meifeng Lin ◽  
Brett Viren ◽  
...  
Keyword(s):  
Heterogeneous Computing ◽  
Programming Model ◽  
Liquid Argon ◽  
Simulation Code ◽  
Computationally Intensive ◽  
Physics Model ◽  
Specialized Hardware ◽  
Neutrino Experiments ◽  
High Level ◽  
Time Projection

The Liquid Argon Time Projection Chamber (LArTPC) technology plays an essential role in many current and future neutrino experiments. Accurate and fast simulation is critical to developing efficient analysis algorithms and precise physics model projections. The speed of simulation becomes more important as Deep Learning algorithms are getting more widely used in LArTPC analysis and their training requires a large simulated dataset. Heterogeneous computing is an efficient way to delegate computationally intensive tasks to specialized hardware. However, as the landscape of compute accelerators quickly evolves, it becomes increasingly difficult to manually adapt the code to the latest hardware or software environments. A solution which is portable to multiple hardware architectures without substantially compromising performance would thus be very beneficial, especially for long-term projects such as the LArTPC simulations. In search of a portable, scalable and maintainable software solution for LArTPC simulations, we have started to explore high-level portable programming frameworks that support several hardware backends. In this paper, we present our experience porting the LArTPC simulation code in the Wire-Cell Toolkit to NVIDIA GPUs, first with the CUDA programming model and then with a portable library called Kokkos. Preliminary performance results on NVIDIA V100 GPUs and multi-core CPUs are presented, followed by a discussion of the factors affiecting the performance and plans for future improvements.

scholarly journals Felix Based Readout of The Single-Phase Protodune Detector

2019 ◽  
Vol 214 ◽  
pp. 01013
Author(s):  
Andrea Borga ◽  
Eric Church ◽  
Frank Filthaut ◽  
Enrico Gamberini ◽  
Jong Paul de ◽  
...  
Keyword(s):  
Single Phase ◽  
Time Windows ◽  
Sampling Rate ◽  
Liquid Argon ◽  
Atlas Collaboration ◽  
Short Baseline ◽  
Long Baseline ◽  
Neutrino Experiments ◽  
Time Projection ◽  
Anode Plane

The liquid argon Time Projection Chamber technique has matured and is now in use by several short-baseline neutrino experiments. This technology will be used in the long-baseline DUNE experiment; however, this experiment represents a large increase in scale, for which the technology needs to be validated explicitly. To this end, both the single-phase and dual-phase implementations of the technology are being tested at CERN in two full-scale (10 × 10 × 10 m3) ProtoDUNE setups. Besides the detector technology, these setups also allow for extensive tests of readout strategies. The Front-End LInk eXchange (FELIX) system was initially developed within the ATLAS collaboration and is based on custom FPGA-based PCIe I/O cards in combination with commodity servers. FELIX will be used in the single-phase ProtoDUNE setup to read the data coming from 2560 anode wires organized in a single Anode Plane Assembly structure. With a sampling rate of 2 MHz, the system must buffer and process an input rate of 74 Gb/s. Event building requests will arrive at a target rate of 25 Hz, and loss-less compression must reduce the data within the requested time windows before it is sent to the experiment’s event building farm. This paper discusses the design of the system as well as first operational experiences.

scholarly journals Reconciling Higgs physics and pseudo-Nambu-Goldstone dark matter in the S2HDM using a genetic algorithm

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Thomas Biekötter ◽  
María Olalla Olea-Romacho
Keyword(s):  
Genetic Algorithm ◽  
Dark Matter ◽  
Cross Sections ◽  
Direct Detection ◽  
Scalar Potential ◽  
Higgs Sector ◽  
Higgs Doublet ◽  
Final State ◽  
The One ◽  
Relic Abundance

Abstract We investigate a possible realization of pseudo-Nambu-Goldstone (pNG) dark matter in the framework of a singlet-extended 2 Higgs doublet model (S2HDM). pNG dark matter gained attraction due to the fact that direct-detection constraints can be avoided naturally because of the momentum-suppressed scattering cross sections, whereas the relic abundance of dark matter can nevertheless be accounted for via the usual thermal freeze-out mechanism. We confront the S2HDM with a multitude of theoretical and experimental constraints, paying special attention to the theoretical limitations on the scalar potential, such as vacuum stability and perturbativity. In addition, we discuss the complementarity between constraints related to the dark matter sector, on the one hand, and to the Higgs sector, on the other hand. In our numerical discussion we explore the Higgs funnel region with dark matter masses around 60 GeV using a genetic algorithm. We demonstrate that the S2HDM can easily account for the measured relic abundance while being in agreement with all relevant constraints. We also discuss whether the so-called center-of-galaxy excesses can be accommodated, possibly in combination with a Higgs boson at about 96 GeV that can be the origin of the LEP- and the CMS-excess observed at this mass in the b$$ \overline{b} $$ b ¯ -quark and the diphoton final state, respectively.

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