Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session T20: New Experiments and Associated Detector TechnologyLive
|
Hide Abstracts |
Sponsoring Units: DPF Chair: Julia Gonski, Columbia University |
Monday, April 19, 2021 3:45PM - 3:57PM Live |
T20.00001: FASER (ForwArd Search ExpeRiment) Deion Fellers The design, expected sensitivity, and current construction status of the FASER detector are presented. The FASER detector is in the final stages of construction in preparation for taking data starting in 2022 during Run 3 of the LHC. FASER is dedicated to searching for long-lived particles beyond the standard model. Though extremely rare, such particles may be produced in the high intensity far-forward region of the LHC's proton-proton collisions. These particles may then decay to visible standard model particles within FASER, which is located 480 meters downstream of the ATLAS interaction point. This talk depicts a possible mechanism for the production and detection of a Dark Photon with the FASER detector. The motivation for the design of the FASER detector is also presented. [Preview Abstract] |
Monday, April 19, 2021 3:57PM - 4:09PM Live |
T20.00002: The NNBAR Experiment Katherine Dunne Baryon number violating processes are one of the Sakharov conditions considered necessary to explain the matter-antimatter asymmetry in the universe, but are yet to be observed. The NNBAR experiment, planned to be housed at the European Spallation Source (ESS) will perform a search with free neutrons for neutron-antineutron oscillations ($\Delta B=2$) with a gain in sensitivity of three orders of magnitude compared to the most recent search with free neutrons. NNBAR is a two-stage experiment which will begin with the first stage, termed HIBEAM, at which searches for neutron-sterile neutron oscillations ($\Delta B=1$) will take place as well as detector validation and R$\&$D for the second stage (to take place after 2030), which would search for neutrons converting to antineutrons. This talk will present the NNBAR experiment as well as ongoing work towards a prototype calorimeter at Stockholm University. [Preview Abstract] |
Monday, April 19, 2021 4:09PM - 4:21PM Live |
T20.00003: A forward silicon tracker for heavy flavors and jets measurements at the future electron-ion collider experiments Cheuk-Ping Wong The future Electron-Ion Collider (EIC) will advance the frontier of nuclear physics by exploring quantum chromodynamics in a wide kinematic range. Benefited by the high luminosity and high energy electron and ion beams, the EIC will be able to obtain the nucleon tomography and study the parton interaction within the nucleon. The heavy flavors and jets measurements will be the key to study hadronization processes inside and outside the nucleon and enhance precision in parton distribution measurement in the poorly constrained kinematic region. Therefore, a forward silicon tracker (FST) will be essential to enhance the signal to background ratio of heavy flavor reconstructions using the displaced vertex method. The FST will provide momentum and vertex measurements of charged particles in pseudorapidity between 1 and 4 for heavy flavor tagging and jet reconstruction. Demonstrated by simulations, the FST can reduce the background for clean heavy flavor particle identification with the use of the proposed silicon sensor candidates which have fine spatial and fast time resolutions. This presentation will summarize the detector performance of the latest FST design in the integrated detector setup from detector simulations, physics simulations studies and the future plan. [Preview Abstract] |
Monday, April 19, 2021 4:21PM - 4:33PM Live |
T20.00004: FPGA-based firmware implementation of a missing transverse momentum algorithm for the CMS Phase-2 Level-1 trigger Jieun Hong The high-luminosity upgrade of the CERN Large Hadon Collider (HL-LHC) will enable a factor of ten increase in the total dataset collected by the CMS experiment, maximizing the potential for the discovery of new physics. While the increased instantaneous luminosity will bring this significant advantage, it also requires improved capabilities of the CMS detector performance. The CMS Level-1 trigger will be significantly expanded during the Phase-2 upgrade to allow for more efficient data collection. The Level-1 correlator trigger will become the main engine of the trigger system, performing particle-flow (PF) reconstruction, which reconstructs physics objects by combining signals collected by all subdetectors. These PF objects are passed to a second-stage FPGA for further processing into higher-level objects. This work describes the firmware implementation of a missing transverse momentum algorithm, developed using Xilinx Vivado high-level synthesis, including emulation results with the prototype trigger board. [Preview Abstract] |
Monday, April 19, 2021 4:33PM - 4:45PM Live |
T20.00005: sPHENIX Outer Hadronic Calorimeter Assembly, Testing, and Calibration Daniel Richford The sPHENIX Detector is a new experiment at RHIC at BNL, designed to measure jets and upsilons in heavy-ion collisions, with an expected start of February 2023. The sPHENIX hadronic calorimeters are used for the measurement of jets and comprise two steel/scintillator sampling detectors inside and outside of sPHENIX's cylindrical magnet. Overall, the outer calorimeter---to be finished in spring, 2021---has acceptance of -1.1 $\le$ $\eta$ $\le$ 1.1 and 0 $\le$ $\phi$ < 2$\pi$, and a depth of 3.8 nuclear-interaction lengths. The 32 sectors comprising the outer calorimeter are built in a factory setting, with multiple sectors simultaneously being assembled (populated with scintillator and electronics), tested (using fixed LEDs to record scintillator response), and calibrated. Each sector is calibrated with cosmic muons. This talk discusses the design, assembly, and testing of the outer hadronic calorimeter. Status of testing and calibration using cosmic rays are shown. [Preview Abstract] |
Monday, April 19, 2021 4:45PM - 4:57PM Live |
T20.00006: Deep learning implementation for Dual-Readout calorimeter. YunJae Lee, Jason Lee, Hwidong Yoo, Sehwook Lee, Sanghyun Ko, Seungkyu Ha, Kyuyeong Hwang, Minsoo Kim, Yun Eo, Junewoo Park, Kyungho Kim, Sungwon Kim, Bobae Kim, Junghyun Lee, Minsang Ryu, Ian Watson, Jongsuk Park, Doyeong Kim The dual-readout calorimeter consists of scintillating and Cerenkov fibers readout together. This design allows both electromagnetic and hadronic showers to be measured with high precision in a single detector. While it's under development for future colliders, deep learning implementations are studied to maximize the physics potential. Image based deep learning model analyzes pixelated energy deposit with convolutional neural networks. And raw energy deposit can be applied with a point cloud based deep learning method. Using these methods, jet reconstruction, particle identification, and fast simulation can be improved. We present demonstrations of jet variables regression, particle discrimination, and shower generator for the dual-readout calorimeter. [Preview Abstract] |
Monday, April 19, 2021 4:57PM - 5:09PM Live |
T20.00007: Development of the Mu2e electromagnetic calorimeter mechanical structures Daniele Pasciuto Mu2e is the Fermilab Muon Campus experiment dedicated to the search for the charged-lepton flavour violating neutrino-less coherent conversion of a muon into an electron in the field of an aluminum nucleus. The Mu2e goal is to improve the search sensitivity reached by previous experiments by four orders of magnitude. To achieve this challenging goal, Mu2e exploits a complex detector system made of a straw-tracker and an electromagnetic crystal calorimeter located inside an evacuated superconducting solenoid, and a cosmic ray veto. The main calorimeter function is providing an excellent electron identification in the conversion electron energy range ($\approx 100$ MeV). The calorimeter is made of 2 matrices of 674 un-doped CsI crystals coupled to SiPMs arranged in 2 disks positioned downstream the aluminum target to maximize the signal detection efficiency. The harsh experimental conditions in terms of radiation dose, magnetic field and vacuum level has posed several challenges, in terms of materials and components choice and design. In this presentation we will review the design of the mechanical structures, that required the use of magnetic field and vacuum compatible materials, including composite materials, and the development of a dedicated cooling system for the electronics. [Preview Abstract] |
Monday, April 19, 2021 5:09PM - 5:21PM Live |
T20.00008: Protocol generator for on-wire and on-disk data formats for DAQ systems Jan Bernauer The documentation, implementation and testing of data formats is a typical and tedious task in the realization of data acquisition systems. This situation is worsened by the ongoing efforts in developing high-rate capable streaming-readout systems and associated on-wire and on-disk data formats. Unfortunately, few software tools exists that can help in the development, e.g. by automatically generating data verification or generation tools from a bit-level description of the format, or by generating data structures and accessor functions in the programming language of choice. In the talk, I will present such a tool currently in development, and show how it can be applied in some example use-cases. [Preview Abstract] |
Monday, April 19, 2021 5:21PM - 5:33PM Live |
T20.00009: Light Ion Polarimetry for the EIC Ana Sofia Nunes The Electron-Ion Collider (EIC) will be the first high energy collider using both polarized electrons and polarized protons and light ions, and these two types of beams require the measurement of their polarization. The polarimetry of proton beams was significantly improved at RHIC in the past two decades, but the EIC presents more challenging conditions, namely more demanding beam conditions, and the measurement of the polarization of light ion beams will be done for the first time. There is no theory that can predict the transverse spin asymmetries in the elastic scattering of nuclei from fixed target polarimeters by polarized light ions from the beams. Moreover, the background to the events of elastic scattering, albeit small at RHIC, may become important in EIC conditions because of the shorter bunch spacing and of nuclear breakup fragments. For these reasons, the study of those backgrounds, both in Monte Carlo simulations and, in the next few years, profiting from RHIC data-taking campaigns, has become important. Results from the simulations and details on possible tests will be presented. [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