Bulletin of the American Physical Society
APS April Meeting 2015
Volume 60, Number 4
Saturday–Tuesday, April 11–14, 2015; Baltimore, Maryland
Session B8: Invited Session: Search for New Physics with Atoms, Molecules and NucleiInvited

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Sponsoring Units: GPMFC GFB Chair: Marianna Safronova, University of Delaware Room: Key 4 
Saturday, April 11, 2015 10:45AM  11:21AM 
B8.00001: Tests of fundamental symmetries Invited Speaker: Dmitry Budker ``Fundamental symmetry'' refers to invariance of the laws of Nature, including the values of fundamental constants, with respect to a continuous or discrete transformation such as translation in space or time, rotation, spatial (P), time (T), or charge (C) reversal, combinations of these, or permutation of identical quantum particles. All discrete symmetries except for the combined CPT and the permutation symmetry are experimentally known to be violated by the weak interactions; intense searches are conducted for possible small violations of the stillstanding discrete as well as the continuous symmetries, which may result from exotic beyondthestandardmodel interactions. In this talk, I will describe some of the recent fundamentalsymmetry tests involving our research group (for uptodate bibliography see http://budker.berkeley.edu/PubList.html), including measuring the effect of the gravitationfield gradient on the value of the finestructure ``constant,'' and searching for transient and timedependent effects on atomic magnetometers and clocks. [Preview Abstract] 
Saturday, April 11, 2015 11:21AM  11:57AM 
B8.00002: Manifestations of Symmetry Violation in Nuclei Invited Speaker: Wick Haxton Nuclei are remarkable laboratories for testing symmetries, frequently greatly enhancing small effects through energy degeneracies and other means, and often selecting out specific interactions through selection rules imposed by angular momentum, isospin, and energetics. Some of our most stringent tests of time reversal invariance, lepton number conservation, and parity come from experiments done on atomic nuclei. I summarized the status of several such tests, and describe some of the questions that remain unresolved. [Preview Abstract] 
Saturday, April 11, 2015 11:57AM  12:33PM 
B8.00003: New Upper Limit on the Electron's Electric Dipole Moment Invited Speaker: John Doyle The ACME collaboration has measured the electron's electric dipole moment (eEDM) to be $d_e = (2.1 \pm 3.7_{\mathrm{stat}} \pm 2.5_{\mathrm{syst}}) \times 10^{29} \; e \cdot \mathrm{cm}$ [1,2]. This corresponds to an upper limit of $d_e < 8.7 \times 10^{29} \; e \cdot \mathrm{cm}$ with 90 percent confidence, which represents an order of magnitude improvement on the previous best limit [3]. We describe our method of measuring the eEDM using a buffer gas cooled beam of thorium monoxide (ThO) and discuss our approach to finding and quantifying systematic effects. This results constrains Tviolating physics at the TeV energy scale.\\[4pt] [1] The ACME Collaboration, \emph{Science} \textbf{343}, (2014) 269272.\\[0pt] [2] L.~V.~Skripnikov, A.~N.~ Petrov, and A.~V.~Titov, \emph{J.~Chem.~Phys.} \textbf{139}, (2013) 221103.\\[0pt] [3] J.~J.~Hudson, D.~M.~Kara, I.~J.~Smallman, B.~E.~Sauer, M.~R.~Tarbutt, and E.~A.~Hinds, \emph{Nature} \textbf{473}, (2011) 493496. [Preview Abstract] 
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