Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session 2A: GPMFC Workshop: Precision Measurements with Molecules
8:55 AM–5:05 PM,
Monday, June 3, 2024
Room: 202CD
Chair: Tanya Zelevinsky, Columbia University
Abstract: 2A.00006 : Trapped chiral molecular ions for precision sensing of parity violation - a new experiment*
11:00 AM–11:30 AM
Presenter:
Yuval Shagam
(Technion)
Author:
Yuval Shagam
(Technion)
We have found several intriguing candidates to search for PV, the most promising of which is CHDBrI+. Ab initio theory predicts a >1 Hz shift between L and R molecules for the C-H bend vibrational transition, where the transition’s linewidth is >10x narrower than the shift. Additionally, the C-H stretch transition is also predicted to exhibit a similarly large shift, but with a shorter natural lifetime. Our plan is to prepare cold CHDBrI+ through state-selective, near-threshold photoionization of neutral CHDBrI. Resolved detection of the molecular ion's internal state will be performed through sensing photofragment velocities in our ion trap that is integrated with velocity map imaging.
We plan to extract the PV signature from a mixed chirality ensemble of trapped CHDBrI+, using vibrational Ramsey spectroscopy that is embedded within the 3-wave mixing (3WM) framework. So far 3WM has been demonstrated using microwaves to separate molecules according to their handedness using asymmetry of the chiral molecules’ transition dipole moment components. We propose to extend these ideas for differential precision spectroscopy between the two chiralities, which is critical to suppress noise and sources of systematic uncertainty.
Crucially, comparison between the two chiralities of the molecule isolates all PV interactions, which arise from the Standard Model and beyond. We will discuss the possibility of using trapped chiral molecular ions to search for new physics.
*ERC no. 2033752 - Q-ChiMP
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