Bulletin of the American Physical Society
APS April Meeting 2012
Volume 57, Number 3
Saturday–Tuesday, March 31–April 3 2012; Atlanta, Georgia
Session X4: Invited Session: The Detection Challenge in Modern Physics Experiments |
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Sponsoring Units: GGR DPF Chair: Patrick Brady, University of Madison-Wisconsin Room: International Ballroom North |
Tuesday, April 3, 2012 1:30PM - 2:06PM |
X4.00001: Gravitational wave astronomy with LIGO and Virgo detectors Invited Speaker: Gabriela Gonzalez I will present the latest results from the searches for gravitational waves in LIGO and Virgo data, including the results from a blind injection experiment in 2010 on the ability to make a discovery, and on the efforts to search for electromagnetic and high-energy counterparts of gravitational wave triggers. I will also review the bright prospects for gravitational wave astronomy with the Advanced LIGO and Virgo detectors now under construction. [Preview Abstract] |
Tuesday, April 3, 2012 2:06PM - 2:42PM |
X4.00002: Measurement of the neutrino velocity with the OPERA detector in the CNGS neutrino beam Invited Speaker: Dario Autiero The OPERA neutrino experiment at the underground Gran Sasso Laboratory measured the velocity of neutrinos from the CERN CNGS beam over a baseline of about 730 km with much higher accuracy than previous studies conducted with accelerator neutrinos. The measurement was based on high statistics data taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of the CNGS timing system and of the OPERA detector, as well as a high precision geodesy campaign for the measurement of the neutrino baseline, allowed reaching comparable systematic and statistical accuracies and limiting the overall uncertainty on the neutrinos time of flight measurement to 10 ns. The time of flight was measured by comparing the time distributions of neutrino interactions in OPERA and of protons hitting the CNGS target in 10.5 $\mu$s long extractions. The above result, indicating an early arrival time of about 60 ns of CNGS muon neutrinos with respect to the one computed assuming the speed of light in vacuum, was confirmed by a test performed using a beam with a short-bunch time-structure allowing to measure the neutrino time of flight at the single interaction level. The OPERA neutrino velocity measurement will be review as well as the latest developments and perspectives. [Preview Abstract] |
Tuesday, April 3, 2012 2:42PM - 3:18PM |
X4.00003: ADMX: The Axion Dark Matter eXperiment Invited Speaker: Gray Rybka The axion, a hypothetical particle proposed as a solution to the strong CP problem, is also a compelling dark matter candidate. ADMX (Axion Dark Matter Experiment) is a microwave cavity search for axion dark matter. The incarnation of ADMX currently under construction will be the most sensitive yet: able to exclude pessimistic axion couplings even at fractional dark matter halo densities. This is a step closer to the goal of either discovering the axion or excluding it entirely as a dark matter candidate. Recent limits, current progress, and future plans for ADMX will be discussed. [Preview Abstract] |
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