Bulletin of the American Physical Society
APS April Meeting 2016
Volume 61, Number 6
Saturday–Tuesday, April 16–19, 2016; Salt Lake City, Utah
Session U16: Axions and Axion-like Particles |
Hide Abstracts |
Sponsoring Units: DPF Chair: Kev Abazajian, University of California, Irvine Room: 251D |
Monday, April 18, 2016 3:30PM - 3:42PM |
U16.00001: The ARIADNE axion NMR experiment Andrew Geraci The Axion Resonant InterAction Detection Experiment (ARIADNE) is a collaborative effort to search for short-range spin-dependent couplings between nuclei resulting from the QCD axion, using a technique based on nuclear magnetic resonance. The aim is to detect monopole-dipole interactions between the spin of 3He nuclei and a rotating unpolarized tungsten attractor. I will discuss the basic principle of the experiment and the current experimental status, as well as several of the anticipated technical challenges involved in these types of measurements. [Preview Abstract] |
Monday, April 18, 2016 3:42PM - 3:54PM |
U16.00002: Magnetic shielding design for the ARIADNE axion experiment Harry Fosbinder-Elkins ARIADNE (or the Axion Resonant InterAction DetectioN Experiment) seeks to detect minute spin-dependent forces using NMR techniques. Crucial to the success of the experiment is to screen the 3He sample from ordinary magnetic fields which can fluctuate at the nuclear Larmor precession frequency. The solution involves cryogenic superconducting shielding, which poses additional challenges associated with magnetic field gradients throughout the sample volume. These gradients are problematic for experiments like ARIADNE since they create a spatial gradient in the Larmor frequency. We describe a magnetic shielding strategy for suppressing such gradients and the resulting inhomogeneous broadening by over two orders of magnitude, potentially enabling long transverse coherence times and operation near the ideal design sensitivity. This method could be employed in future precision experiments requiring similar magnetically shielded environments. [Preview Abstract] |
Monday, April 18, 2016 3:54PM - 4:06PM |
U16.00003: Any Light Particle Search (ALPS) Aaron Spector High power laser fields enabled by technologies developed for ground-based gravitational-wave observatories open up new opportunities for fundamental physics studies. One of these options is the search for axions and axion-like particles in a pure laboratory experiment. The axion is a solution to the strong CP-problem and a potential dark matter candidate. The axion has also been proposed as an additional channel to cool stars as well as a potential explanation for the TeV transparency problem. The German-US ALPS collaboration is setting up a light-shining-through-walls (LSW) experiment at DESY. LSW experiments are based on the simple idea that a high power laser field traversing a static magnetic field will transform partly into a relativistic axion field. This axion field will travel through an opaque wall into a second static magnetic field region where it turns partly back into an electromagnetic wave field with the same frequency as the laser. The ALPS collaboration is working towards a large scale LSW experiment at DESY in Hamburg, Germany. I will report on the status of the ALPS experiment. [Preview Abstract] |
Monday, April 18, 2016 4:06PM - 4:18PM |
U16.00004: Experiment to measure vacuum birefringence: Conceptual design, Guido Mueller, David Tanner, Babette Doebrich, Jan Poeld, Axel Lindner, Benno Willke Vacuum birefringence is another lingering challenge which will soon become accessible to experimental verification. The effect was first calculated by Euler and Heisenberg in 1936 and is these days described as a one-loop correction to the differential index of refraction between light which is polarized parallel and perpendicular to an external magnetic field. Our plan is to realize (and slightly modify) an idea which was originally published by Hall, Ye, and Ma [1] using advanced LIGO and LISA technology and the infrastructure of the ALPS light-shining-through-walls experiment following the ALPS IIc science run. [1] John L. Hall, Jun Ye, Long-Sheng Ma, Measurement of mirror birefringence at the sub-ppm level: Proposed application to a test of QED, PRA, Vol. 62, 013815 (2000) [Preview Abstract] |
Monday, April 18, 2016 4:18PM - 4:30PM |
U16.00005: Search for axion-like dark matter with {\sc Majorana Demonstrator} Commissioning Data Kristopher Vorren The \textsc{Majorana Demonstrator} (MJD) is an array searching for neutrinoless double-beta decay using p-type point contact (PPC) HPGe detectors in an ultra-low background environment. The low-noise characteristics of the PPC detectors also enable searches for various types of dark matter which manifest as signals at low energies ($<$ 100 keV). A preliminary analysis of a search for axion-like particle (ALP) dark matter with about 400 kg-d of enriched detector data -- taken during a 2015 commissioning run of the partially completed MJD array -- is presented. We also discuss the projected sensitivity of the full MJD array that will be completed in 2016. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, the Particle Astrophysics and Nuclear Physics Programs of the National Science Foundation, and the Sanford Underground Research Facility. [Preview Abstract] |
Monday, April 18, 2016 4:30PM - 4:42PM |
U16.00006: Improving Limits on Exotic Spin Dependent Long Range Forces using Double Boson Exchange Sheakha Aldaihan, William Michael Snow, Dennis Krause, Joshua Long The existence of very light weakly interacting particles that mediate new long range forces has been suggested in many extensions of the Standard Model. Such particles span a length scale between a $\mu $m and a few meters and include axions, familons, Majorons,and arions. Parameterizations of forces in this range show that they are composite-dependent, have a Yukawa shape, and have both spin-dependent as well as spin independent components. Very stringent limits on spin-independent couplings exist. For long range spin dependent forces, limits are weaker by 20 orders of magnitude compared to their spin independent analogs. The disparity in the limits raises the question of whether interesting limits on spin dependent couplings can be inferred from spin independent searches for long range forces. We show that this is possible using higher order contributions corresponding to double boson exchange and report the limits placed on spin dependent couplings using this method. [Preview Abstract] |
Monday, April 18, 2016 4:42PM - 4:54PM |
U16.00007: Short-range, spin-dependent interactions of electrons: a sensitive probe for exotic pseudo-Goldstone bosons William Terrano, Eric Adelberger, John Lee, Blayne Heckel We used a torsion pendulum and rotating attractor with 20-pole electron-spin distributions to probe dipole-dipole interactions mediated by exotic pseudo-Goldstone bosons with $m_{\rm b}c^2\leq 500 \; \mu$eV
and coupling strengths up to 14 orders of magnitude weaker than electromagnetism. Our 95\% confidence result indicates that any hidden global symmetry involving electrons must have a
symmetry-breaking scale $F \geq 70$ TeV, the highest reached in any laboratory experiment. We used an attractor with a 20-pole unpolarized mass distribution to improve laboratory bounds on $CP$-violating monopole-dipole forces with $1.5\:\mu$eV$ |
Monday, April 18, 2016 4:54PM - 5:18PM |
U16.00008: Revisiting the U(1) Goldstone Boson of Large N QCD Invited Speaker: Michael Dine |
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