Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M05: Search for Beyond Standard Model Interactions IILive
|
Hide Abstracts |
Sponsoring Units: GPMFC Chair: Andrew Geraci, Northwestern University |
Wednesday, June 2, 2021 2:00PM - 2:12PM Live |
M05.00001: Generalised King Plots and the Search for New Physics Using Isotope Shift Spectroscopy. Julian C Berengut, Cédric Delaunay, Amy Geddes, Yotam Soreq King Plots are traditionally used to extract nuclear parameters from isotope shift measurements in a given atom or ion. It has long been assumed that a King Plot will be linear within the uncertainties of the experimental data from which they have been constructed. However, as the precision of atomic isotope shift measurements improve, the linearity of the King Plot may be broken. Previous work has proposed that non-linearities (NL) in King Plots may indicate the existence of physics beyond the Standard Model [1]. |
Wednesday, June 2, 2021 2:12PM - 2:24PM Live |
M05.00002: Searching for Vector Dark Matter with an Optomechanical Accelerometer Jack Manley, Mitul Dey Chowdhury, Daniel Grin, Swati Singh, Dalziel Wilson Several dark matter candidates are expected to interact with ordinary matter to produce a weak mechanical signal, such as a vector force/acceleration or scalar strain. Here we focus on acceleration signals due to vector dark matter in the 1 kHz - 10 MHz range (particle masses 10−11 −10−7 eV/c2 ). The acceleration signal can be enhanced on mechanical resonance, motivating the use of a high Q, cryogenically cooled mechanical resonator. As a concrete example, we describe a detector based on a silicon nitride membrane fixed to a beryllium mirror, forming an optical cavity. The use of different materials gives access to forces proportional to baryon (B) and lepton (L) charge, which are believed to be coupling channels for vector dark matter particles. The cavity meanwhile provides access to quantum-limited displacement measurements. For a centimeter-scale membrane pre-cooled to 10 mK, we argue that sensitivity to vector B-L dark matter can exceed that of the Eot-Wash experiment in integration times of minutes, over a fractional bandwidth of ∼ 0.1% near 10 kHz. Our analysis can be translated to alternative systems and suggests the possibility of a new generation of table-top experiments. |
Wednesday, June 2, 2021 2:24PM - 2:36PM Live |
M05.00003: Search for non-Newtonian interactions at micrometer scale with a levitated test mass Nadav Priel, Charles P Blakemore, Alexander Fieguth, Akio Kawasaki, Denzal O Martin, Alexander Rider, Qidong Wang, Giorgio Gratta The universal law of gravitation has undergone stringent tests for many decades over a significant range of length scales, from atomic to planetary. Of particular interest is the short distance regime, where modifications to Newtonian gravity may arise from axion-like particles or extra dimensions. We have constructed an ultra-sensitive force sensor based on optically-levitated microspheres with a force sensitivity of $10^{-16}N/ \sqrt{Hz}$ for the purpose of investigating non-Newtonian forces that couple to mass with a characteristic scale of $\sim 10 \mu$m. |
Wednesday, June 2, 2021 2:36PM - 2:48PM Live |
M05.00004: Scanning force sensing at sub-μm-distances from a surface using optically trapped nanospheres Eduardo Alejandro, Cris A Montoya, William Eom, Daniel H Grass, Nicolas Clarisse, Apryl Witherspoon, Andrew A Geraci In vacuum, optically levitated dielectric nanoparticles are extremely well-decoupled from the environment, making them a powerful tool for precision measurement experiments. We trap a ~170 nm diameter silica nanoparticle in a single-beam tweezer trap and transfer it into a standing wave potential by retro-reflecting a laser beam from a gold-coated silicon mirror surface. In the transfer process, we reliably position the nanoparticle at distances of a few hundred nanometers to tens of microns from the surface and use a piezo-driven mirror to scan the two dimensional space parallel to the mirror surface, achieving attonewton level force sensing at room temperature and moderate vacuum. This method enables three-dimensional scanning force sensing near surfaces using optically trapped nanoparticles, promising for high-sensitivity scanning force microscopy, tests of the Casimir effect, and tests of the gravitational inverse square law at micron scales. |
Wednesday, June 2, 2021 2:48PM - 3:00PM Live |
M05.00005: Progress toward development of a Strontium atom interferometer for performing short-distance tests of gravity Tejas Deshpande, Yiping Wang, Natasha Sachdeva, Garrett Louie, Jayampathi Kangara, Jonah Glick, Kunchaka Fonseka, Kenneth DeRose, Tim Kovachy Following recent developments in light-pulse atom interferometry (AI) [1], the ability to perform sufficiently sensitive measurements of gravitational effects have opened a window into exploring novel fundamental physics. For example, investigation of the gravitational forces at the 0.1-1 meter distance scale using AI [2] has the potential to reveal violations of the gravitational inverse square law, observe the gravitational Aharonov-Bohm effect, and test theories of gravity-induced quantum decoherence; these research topics are the focus of the atomic fountain (AF) described in this work. |
Wednesday, June 2, 2021 3:00PM - 3:12PM Live |
M05.00006: Additions to Standard Model and Atomic Physics Ulrich D Jentschura Recently, experiments at the ATOMKI laboratory on the possible existence of a |
Wednesday, June 2, 2021 3:12PM - 3:24PM Live |
M05.00007: Predicting outcomes of electric dipole and magnetic moment experiments Peter Porshnev, Vladimir Baryshevsky The search for electric dipole moment (EDM) of elementary particles is the focus of intense experimental and theoretical efforts, since it can potentially reveal CP-violating interactions outside the standard model. In several recent papers we derived the equations of spin precession which include new pseudoscalar corrections. The new phenomenological model can potentially help in matching QFT predictions with high precision measurements of both electric and magnetic moments. The pseudoscalar correction is expected to be small, and might become important in hypersensitive experiments, like the measurements of electric dipole moments which are themselves related to pseudoscalar quantities. The model is directly applicable to storage ring experiments and high precision atomic measurements. It also becomes possible to explain why EDMs are so difficult to measure, since this correction term might lead to the effective screening of electric dipole moments. Within the same model, it is possible to explain the discrepancy between experimental and theoretical values of muon magnetic anomaly under assumption that the pseudoscalar correction is the dominant source of this discrepancy. |
Wednesday, June 2, 2021 3:24PM - 3:36PM Live |
M05.00008: Lorentz and CPT Tests with Charge-to-Mass Ratio Comparisons in Penning Traps Yunhua Ding Lorentz and CPT invariances are fundamental symmetries of both general relativity and the Standard Model of particle physics. However, tiny violations of these symmetries are possible in an underlying theory unifying gravity with quantum physics, such as strings. This talk will focus on the theoretical and experimental prospects for Lorentz and CPT violation in Penning-trap experiments. The theory of Lorentz violation in quantum electrodynamics will be presented, and experimental observables related to charge-to-mass ratio comparisons will be established for Penning-trap experiments involving confined particles and antiparticles. New constraints on coefficients for Lorentz violation using existing data from ATRAP and BASE experiments will be presented. |
Wednesday, June 2, 2021 3:36PM - 3:48PM Live |
M05.00009: The Anomaly in the Electron Orbital g-factor and the Search for New Physics Ayodeji M Awobode High precision measurements of the electron spin and/or orbital g-factor complement very well, the atomic/molecular experiments which test for parity, search for a permanent electric dipole moment and test the CPT Theorem, or investigate the Lorentz symmetry and test QED. A search for an anomaly in the electron g-factors also provides a stringent test of QED (and therefore the Standard Model), in which it is currently assumed that the orbital g-factor is unaffected by the radiative interactions, though the anomaly (gS – 2) in the spin g-factor is attributed to radiative corrections. Furthermore, it is currently assumed, without the benefit of sufficient experimental investigations, that the electron has a uniform mass-to-charge distribution like a classical point particle, hence its orbital g-factor must be exactly equal to one, i.e, gL = 1. Nevertheless, determinations from the measurement of the ratio of gJ values in In, Ga, Na, Ar, Ne and He, indicate that the anomaly in the electron orbital g-factor is of the order of 10-3 to 10-4 to very high precisions. Therefore, continued search for anomalies in the electron spin and orbital g-factors, or, alternatively high-precision measurements of the electron factors, will constitute a useful guide in the search for new physics beyond the Standard Model, while also providing a low-energy means of elucidating the nature or structure of the electron. |
Wednesday, June 2, 2021 3:48PM - 4:00PM Not Participating |
M05.00010: Decay Microscope for aβν measurement in Ne beta decay Hitesh V Rahangdale, Ben Ohayon, Guy Ron High precision measurement of the recoil ions from beta emitters such as 23Ne is useful to extract the beta neutrino angular correlation coefficient aβν. aβν, in turn, can be used as a probe to look for the tensor exotic couplings, absent in the standard model of physics. In this regard, we report the development and performance studies of a newly built velocity imaging microscope for the study of recoil ions coming either from nuclear decay or collision from the magneto-optically trapped and cooled neon isotopes[1]. This design incorporates a widely used velocity map imaging setup inside the magneto-optical trap[2]. An electrostatic lens is used for velocity imaging while an extra achromatic lens is used to correct the chromatic aberration occurring due to the short focal length of the electrostatic lens. Depending upon the need, the current device can be configured either to study the high-energy nuclear recoils from the beta decay of radioactive Neon isotopes or the low energy ions from optical collisions. I will present the design and recent results from optical collisions of cold neon either with other cold neon atoms or hot residual atoms in the trap chamber. |
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