Bulletin of the American Physical Society
2016 Fall Meeting of the APS Prairie Section
Volume 61, Number 10
Thursday–Saturday, October 6–8, 2016; Northern Illinois University, DeKalb, Illinois
Session C1: Nuclear, Particle and High Energy Physics |
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Chair: John Laubenstein, Charitable Management Systems, Inc. Room: Wirtz Hall 101 |
Friday, October 7, 2016 1:00PM - 1:12PM |
C1.00001: The Slow Controls System for the Muon g-2 Experiment at Fermilab Michael Eads The goal of the muon g-2 experiment (E-989), currently in the final stages of construction at Fermi National Accelerator Laboratory, is to measure the anomalous gyromagnetic ratio of the muon with unprecedented precision. The uncertainty goal of the experiment, 0.14ppm, represents a four-fold improvement over the current best measurement of this value and has the potential to increase the current three standard deviation disagreement with the predicted standard model value to five standard deviations. Measuring the operating conditions of the experiment will be essential to achieving these uncertainty goals. This talk will describe the current status of the experiment's slow controls system. This system, based on the MIDAS Slow Control Bus, will be used to measure and record currents, voltages, temperatures, humidities, pressures, flows, and other data which is collected asynchronously with the injection of the muon beam. The system consists of a variety of sensors and front-end electronics which interface to back-end data acquisition, data storage, and data monitoring systems. Calibration, installation, and commissioning of the experimental hall environmental sensors are nearly complete, and these sensors are being used to verify the hall's stability. [Preview Abstract] |
Friday, October 7, 2016 1:12PM - 1:24PM |
C1.00002: Boosted Top Jet Tagging at 100 TeV Lauren Ennesser, Robert Tabb, Richard Cavanaugh The identification of top quarks at particle colliders such as the Large Hadron Collider via the resolution of constituent subjets is accomplished by use of various algorithms that analyze the substructure of these jets. These algorithms work well at energies at and below 13 TeV, but in order to probe new physics, higher energies will have to be used. To study boosted top quark jets at these higher energies, the jet substructure algorithms must be tested to determine which ones work best for resolving the jet substructure at these higher energies. We used particle level data produced in Pythia 8.2 of W and top quark jets at 13 TeV and 100 TeV. We tested four jet grooming methods (pruning, trimming, soft drop, and modified mass drop), and two jet substructure algorithms (n-subjettiness and the energy correlation function parameter). We compared these results with the particle level QCD background. We found that grooming methods that are successful at lower energies are less effective at 100 TeV, and the more sensitive methods also have a higher mistag rate. We also found that while the substructure algorithms are not as sensitive at higher energies, they are still able to distinguish the jet substructure from the background. [Preview Abstract] |
Friday, October 7, 2016 1:24PM - 1:36PM |
C1.00003: Radiation Hard Scintillator R&D for LHC and Future Experiments Emrah Tiras, James Wetzel, Burak Bilki, Yasar Onel, David Winn Radiation resistant, high light-yield, fast and cost effective scintillators and detectors are in more need than ever at modern high-energy physics experiments. We have studied several plastic and quartz based scintillators in this regard. Radiation-hard quartz based coated scintillators are tested with MIP and shower particles at Fermilab Test Beam Facility. Plastic scintillators such as PEN, PET, SiX and Eljen samples are exposed to 137Cs gamma source up to 14 MRad and their recovery from radiation damage is studied over time. Here, we discuss test beam and laboratory measurements of scintillating materials and recent developments. [Preview Abstract] |
Friday, October 7, 2016 1:36PM - 1:48PM |
C1.00004: A Radioactive Source Calibration System For The SBND Jonathan Echevers The Short Baseline Neutrino (SBN) physics program consists of three LArTPC detectors located along the Booster Neutrino Beam (BNB) at Fermilab. The SBN program seeks to resolve a class of experimental anomalies in neutrino physics and to perform the most sensitive search to date for sterile neutrinos. While studies of detector response to high energy events have begun, there has been little to no direct demonstration of LArTPCs’ capabilities in producing ground breaking physics with solar and supernovae low-energy neutrinos. We aim to facilitate the development of low-energy LArTPC capabilities by developing the first 1-10 MeV deleted calibration subsystems for large LArTPCs. In this talk, I will introduce the properties of supernova neutrinos, discuss how they can be detected in LArTPCs, and overview the low-energy LArTPC calibration source conceptual designs we are developing at IIT. [Preview Abstract] |
Friday, October 7, 2016 1:48PM - 2:00PM |
C1.00005: Search for charged Higgs bosons in the $\tau$+jets final state using 14.7 fb$^{-1}$ of pp collision data recorded at $\sqrt{s}$=13 TeV with the ATLAS experiment Blake Burghgrave The experimental observation of charged Higgs bosons, $H^{\pm}$, which are predicted by several models with an extended Higgs sector, would indicate physics beyond the Standard Model. This note presents the results of a search for charged Higgs bosons in 14.7 fb$^{-1}$ of pp collision data at $\sqrt{s}$ = 13 TeV recorded by the ATLAS detector at the LHC. The search targets the $\tau$+jets channel in top-quark-associated $H^{\pm}$ production with a hadronically decaying W boson and $\tau$ lepton in the final state. No evidence of a charged Higgs boson is found. For the mass range of $m_{H^{\pm}}$ = 200 - 2000 GeV, upper limits are set on the production cross section of the charged Higgs boson with the subsequent decay $H^{\pm}$ $\rightarrow$ $\tau\nu$ in a range of 2.0 - 0.008 pb. [Preview Abstract] |
Friday, October 7, 2016 2:00PM - 2:12PM |
C1.00006: A Dedicated Quality Control System for the g-2 Straw Tube Tracking System Aaron Epps The Fermilab Muon g-2 experiment will measure the anomalous magnetic moment of the muon to a precision goal of 140 parts per billion, which is a factor of four improvement over the previous E821 measurement at Brookhaven. The experiment will also extend the search for the muon's electric dipole moment (EDM) by approximately two orders of magnitude with a projected sensitivity down to 10$^{-21\, }$e*cm. Both of these measurements are made by an analysis of the modulation of the decay rate of the higher-energy positrons from the (anti-)muon decays recorded by 24 calorimeters and three straw tracking detectors. The straw tracking detectors will be used to cross-calibrate the calorimeter, identify pileup and muons lost from the storage region, and to measure the beam-profile. A tracker measurement of the up-down modulation of positrons will be used in the EDM analysis. Quality control in the straw tracking system is of particular importance, as the uncertainty in measurements taken by the tracking system will be determined by the quality of construction of the trackers. Important parameters include the position of the straw's wire and walls. A dedicated quality-control system has been designed to measure these parameters after construction. The wire position is determined using a moveable and collimated beta-emitting source with a scintillator trigger and the straw wall using an X-ray source. This talk will discuss the studies leading to the design of the quality control system and its construction. [Preview Abstract] |
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