Bulletin of the American Physical Society
APS April Meeting 2020
Volume 65, Number 2
Saturday–Tuesday, April 18–21, 2020; Washington D.C.
Session X14: Computational Physics IOn Demand
|
Hide Abstracts |
Sponsoring Units: DCOMP Chair: Huey-Wen Lin, Michigan State University Room: Virginia A |
Tuesday, April 21, 2020 10:45AM - 10:57AM On Demand |
X14.00001: The L\"{u}scher method for scattering on the lattice Frank Lee, Andrei Alexandru The L\"{u}scher method for elastic scattering is a critical tool for understanding hadron-hadron interactions from lattice QCD. We investigate the approximations made in its applications in a simple quantum mechanical model. The quantization condition is numerically examined by including higher partial waves. Various setups used in practice are considered: cubic and elongated lattices, moving frames, and systems with integer and half-integer spin. [Preview Abstract] |
Tuesday, April 21, 2020 10:57AM - 11:09AM |
X14.00002: Lattice calculation of $F_K / F_\pi$ from a mixed domain-wall on HISQ action. N. B. Miller, H. Monge-Camacho, C. C. Chang, B. H\"orz, E. Rinaldi, D. Howarth, E. Berkowitz, D. A. Brantley, A. S. Gambhir, C. K\"orber, C. Monahan, C. Bouchard, M. A. Clark, B. Jo\'o, A. Nicholson, K. Orginos, P. Vranas, A. Walker-Loud I will present a lattice calculation of the ratio of the leptonic decay constants $F_K/F_\pi$ as performed by the CalLat collaboration. Per Marciano, $F_K/F_\pi$ can be related to the CKM matrix element $|V_{us}|$, therefore allowing us to probe the flavor-changing nature of the weak interaction and more generally providing constraints on the Standard Model. Further, $F_K/F_\pi$ serves as a gold-plated quantity in LQCD, providing a means to benchmark competing lattice techniques and actions. In our work, we employ a mixed-action with twisted-mass fermions in the sea and domain-mall fermions in the valence sector. We include five pion masses, ranging from 130~MeV to 350~MeV; four lattice spacings, ranging from 0.06~fm to 0.15~fm; and multiple lattice volumes. The extrapolation to the physical point is performed using MA EFT and SU(2) $\chi$PT to NNLO at 2-loops, with errors estimated for statistics, the chiral \& continuum extrapolations, FV, and model selection. [Preview Abstract] |
Tuesday, April 21, 2020 11:09AM - 11:21AM |
X14.00003: Sparsening algorithms for lattice QCD calculations William Detmold Modern advances in algorithms for lattice QCD calculations have steadily driven down the resources required to generate gauge field ensembles and calculate quark propagators, such that, in cases relevant to nuclear physics, performing quark contractions to assemble correlation functions from propagators has become the dominant cost. I will describe a new propagator sparsening algorithm for forming correlation functions describing multi-hadron systems, such as light nuclei, with reduced computational cost. [Preview Abstract] |
Tuesday, April 21, 2020 11:21AM - 11:33AM |
X14.00004: Light Scalar Dark Matter and the Lyman-$\alpha$ Forest Miguel Correa, Grant J. Mathews, Lara A. Phillips, In-Saeng Suh, Jared Coughlin The identity of dark matter remains unknown. A recent very promising dark matter candidate consists of ultralight or “fuzzy” dark matter (FDM). Simulations employing this form of dark matter seem capable of matching most observations. In particular, FDM’s large 1 kpc DeBroglie wavelength produces quantum mechanical effects on galactic scales, alleviating several known computational discrepancies in the standard $\Lambda$CDM cosmology. However, despite the successes of the model, spectral signatures of the Lyman-$\alpha$ forest still conflict with FDM’s predictions. We will report on numerical simulations of large scale structure and the intergalactic medium using a modified version of the publicly available SPH GADGET code, which we use to simulate the Lyman-$\alpha$ forest. We will discuss various means to bring the FDM hypothesis into agreement with the observations. [Preview Abstract] |
Tuesday, April 21, 2020 11:33AM - 11:45AM On Demand |
X14.00005: The Hiperwall tiled-display wall system for Big-Data research. Muhammad Saleem In the era of Big Data, with the increasing use of large-scale data-driven applications,$\backslash $pardvisualization of very large high-resolution images and extracting useful informationsearching for specific targets or rare signal events) from these images can pose challengesthe current display wall technologies. At Bellarmine University, we have setan Advanced Visualization and Computational Lab using a state-of-the-art nextdisplay wall technology, called Hiperwall (Highly Interactive Parallelized Display Wall). The 16 ft x 4.5 ft Hiperwall visualization system has a total resolution of 16.5(MP) which consists of eight display-tiles that are arranged in a 4 x 2 tile. This system can perform interactive visual data analytics of largeby comparative views of multiple large images in Astronomy andevent displays in experimental High Energy Physics. Users can display a singleimage across all the display-tiles, or view many different images simultaneouslymultiple display-tiles. Hiperwall enables simultaneous visualization of multiple highimages and its contents on the entire display wall without loss of clarity and. Hiperwall's middle ware also allows researchers in geographically diverseto collaborate on large scientific experiments. This setup providesnew generation of display wall setup and is based on the Hiperwall technology, which is a robust visualization system for Big Data research. [Preview Abstract] |
Tuesday, April 21, 2020 11:45AM - 11:57AM |
X14.00006: CMS Tracker Geometry Migration to the DD4hep Framework Andres Vargas Hernandez DD4hep (Detector Description for High Energy Physics) is a geometry framework based on well known technologies on High Energy Physics: the ROOT framework and Geant4. The Compact Muon Solenoid (CMS) experiment, is the first collaboration in assuming the challenge of porting its existing geometry to this new framework. In the past, the geometry was based on classes written as part of the CMS Software framework CMSSW, a package named ``Detector Description'' or DD. However, due to the lack of maintenance of these basic building blocks, the modification and addition of new features is rather challenging and if every experiment develops the same feature for its own framework, there would be duplication of work which renders itself in a rather inefficient process. By using DD4hep, a project of the Advanced European Infrastructures for Detectors at Accelerators (AIDA), CMS and other experiments benefit from the continuous support and development, this project brings together developers from different collaborations to work on common features that will benefit the high energy physics community as a whole. In this talk I will present the progress, lessons learned and contributions to the effort of migrating the CMS geometry, and in particular the tracker subdetector. [Preview Abstract] |
Tuesday, April 21, 2020 11:57AM - 12:09PM On Demand |
X14.00007: Modeling Charge and Light Yields in Liquid Argon with NEST Justin Mueller NEST (Noble Element Simulation Technique) is a C++ package, with optional GEANT4 or Python integration, that allows for the precise simulation of charge and light yields in noble elements across several orders of magnitude of energy and drift fields. This is accomplished through empirically developed models and encompasses a variety of past xenon experimental results. This talk covers the work that has been done to develop similar models for argon. Proper simulation of charge and light yields in argon is increasingly more important with the advent of large-scale argon-based experiments such as DarkSide-50, the future Deep Underground Neutrino Experiment (DUNE), and the argon-based portion of the COHERENT experiment, CENNS-10. NEST is primarily used for energy scales typical in direct dark matter detectors or double beta decay searches, but also covers regions of interest for events in neutrino experiments such as those caused by supernovae neutrinos, solar neutrinos, or coherent elastic neutrino-nucleus scattering. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700