Bulletin of the American Physical Society
2018 Annual Meeting of the APS Four Corners Section
Volume 63, Number 16
Friday–Saturday, October 12–13, 2018; University of Utah, Salt Lake City, Utah
Session E08: Particle Physics |
Hide Abstracts |
Chair: Pearl Sandick, University of Utah Room: CSC 13 |
Friday, October 12, 2018 1:30PM - 1:42PM |
E08.00001: Micromegas Front End Electronics for the ATLAS New Small Wheel Upgrade Casey Frantz, Kenneth Arthur Johns In order to increase the discovery reach of the CERN Large Hadron Collider (LHC), the nominal luminosity will be increased by a factor of 5-7 for the high luminosity LHC (HL-LHC). An important upgrade of the ATLAS experiment, one of the four major experiments at the LHC, is the New Small Wheel (NSW) project, which will preserve the excellent performance of the muon spectrometer at the HL-LHC luminosity. Two new detector technologies, Micromegas detectors and small-strip Thin Gap Chambers will be used in the NSW. Front end electronics for the Micromegas detectors are being developed and tested. The front end electronics use several custom ASICs in order to survive the high radiation environment. The physics motivation for the NSW will discussed. A short technical description of the front end boards will be given. Results on the performance of the front end boards collected on test and production Micromegas detectors will be presented. |
Friday, October 12, 2018 1:42PM - 1:54PM |
E08.00002: Development of New 3D Radiation Hard Silicon Tracking Detectors for Particle Physics Experiments Patrick Michael Brown We are developing novel silicon tracking detectors of the 3D design with features that may produce signal amplification even at very integrated fluence relevant to the expected lifetime of experiments at the High Luminosity Large Hadron Collider. We describe the design and first characterization of these devices. |
Friday, October 12, 2018 1:54PM - 2:06PM |
E08.00003: Looking for signs of new physics in the flavor sector: a determination of the Vcb CKM matrix element from first principles using lattice QCD. Alejandro Vaquero, Carleton E DeTar, Daping Du, Aida El-Khadra, Andreas Kronfeld, John Laiho, Ruth Van de Waater The CKM matrix relates energy and flavor eigenstates of the quarks in the Standard Model. Its elements are determined by combining experimental measurements of decay rates of heavy mesons with theoretical predictions for the form factors. They are of primary interest because a discrepancy in different determinations can be an indicative of new physics. |
Friday, October 12, 2018 2:06PM - 2:18PM |
E08.00004: Computation of the Disconnected Hadronic Vacuum Polarization Contribution to the Anomalous Magnetic Moment of Muon Shuhei Yamamoto, Carleton E DeTar, Ruth Van de Water, Craig McNeile, Christine Davies, Alejandro Vaquero, Aida El-Khadra The search for new, fundamental physics beyond the Standard Model includes high-precision tests that compare its predictions with experimental measurements. The anomalous magnetic moment of the muon is particularly interesting, because its predicted value disagrees with the most recent experimental measurement by about 3σ. Accordingly, the Fermilab E989 experiment is revisiting this measurement with the goal of reducing the experimental uncertainty by a factor of four. A comparable reduction in the theoretical uncertainty is therefore needed. A large part of the theoretical uncertainty comes from the quantum chromodynamic (QCD) contribution. The QCD contribution is usually divided into two parts -- the hadronic vacuum polarization contribution and the light-by-light scattering contribution. The former contribution is further divided into "connected" and "disconnected" terms. The disconnected term is especially difficult to calculate, and it contributes a relatively large uncertainty. In this talk we describe a computation of that contribution to the anomalous magnetic moment of the muon using ab initio methods of lattice QCD, which aims to reduce that uncertainty considerably. |
Friday, October 12, 2018 2:18PM - 2:30PM |
E08.00005: χ2 For Experimental Physicists Ian Brubaker A widely used tool in the scientific community, Chi Squared is a common method for evaluating the "goodness of fit" for a model to some measured set of data. This talk will discuss the principles, statistics, implementation, and limitations of Chi Squared. It will also cover confidence levels and confidence intervals, how they relate to Chi Squared, and how to properly quote their results in papers. This is a valuable topic for undergraduates both to help understand other researcher's results, and vice versa. |
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