Enhanced Sensitivity in Radioactive Molecules for New Physics Discoveries
Explore the cutting-edge research on highly-charged radioactive molecules leading to amplified sensitivity for uncovering new physics beyond the Standard Model. Key findings include potential solutions to matter-antimatter asymmetry, nuclear CP violation in atomic systems, and enhanced sensitivity with stable surrogates. Dive into the world of experimental ion production, molecule formation, and species identification with this innovative approach. Discover the TITAN experiment and its implications for advanced molecule identification methods. Stay informed about the latest breakthroughs in the field of nuclear physics.
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Presentation Transcript
1 Highly-Charged Radioactive Molecules: Amplifying Sensitivity for New Physics Rane Simpson University of British Columbia (UBC) / TRIUMF May 26, 2025 - INPC Daejeon accelerated Discovery,
New Physics Searches incredibly successful Standard Model matter-antimatter asymmetry Solution? CP Sakharov A.D., Pisma Zh.Eksp.Teor.Fiz. (1967) violation! 2 May 26, 2025 - INPC Daejeon
Nuclear CP Violation Atomic Systems Present upper limit held by 199Hg: |SHg| < 3.1 x 10-13e fm3 [B. Graner et al., 2016] 3 May 26, 2025 - INPC Daejeon
Enhanced Sensitivity Radioactive Molecules Present upper limit held by 199Hg: |SHg| < 3.1 x 10-13e fm3 [B. Graner et al., 2016] Enhancement factors in our approach: octupole deformed nucleus x 100-1,000 in polar molecule in ion trap Compared to spherical atomic nuclei (Hg) Isotope E0 - Ei 667 keV x 1,000-10,000 199Hg + 3 225Ra 55 keV Laser coolable! 229Pa 50 eV All known cases are radioactive Fluorine Protactinium [R.F. Garcia Ruiz, et al., 2020] 4 May 26, 2025 - INPC Daejeon
Enhanced Sensitivity Radioactive molecules +3 Fluorine Protactinium 5 May 26, 2025 - INPC Daejeon
Enhanced Sensitivity Radioactive molecules +3 Stable surrogate Fluorine +2 Protactinium Fluorine Cerium 5 May 26, 2025 - INPC Daejeon
The TITAN Experiment Molecule Formation Identification Me working on the MRTOF for scale [A.A. Kwiatkowski et al., 2024] [W.S. Porter et al., 2022] 6 May 26, 2025 - INPC Daejeon
Experimental Outline Ion production Credit: Chris Charles, Phillip Justus Molecule Formation Species Identification 7 May 26, 2025 - INPC Daejeon
Triply Charged Cerium No SF6 Injection Ion of interest Calibrant 8 May 26, 2025 - INPC Daejeon
Doubly Charged Cerium Fluoride w/ SF6 Injection 9 May 26, 2025 - INPC Daejeon
Outlook 1) Commissioning of separate experimental infrastructure is ongoing in which precision measurements can realistically be performed 2) Collaboration with TRIUMF Life Sciences division towards the production of rare isotopes of thorium and protactinium 3) Alternative methods of highly charged molecule production have been identified which may lead to greater efficiencies and thus are being explored in parallel 4) Perform a measurement of a nuclear Schiff moment with unprecedented precision in the search of BSM Physics 10 May 26, 2025 - INPC Daejeon
Thank You! Many thanks to the Targets and Ion Sources group (T&IS) as well as the TITAN Collaboration for their significant efforts in the advancement of this research. We also acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC). 13 May 26, 2025 - INPC Daejeon
Backup Slides May 26, 2025 - INPC Daejeon
Credit: Carsten Zlch, Robert Berger CeF2+ - Electronic Structure CeF2+ PaF3+ Same ground state Seven lowest lying states show well-ordered, quasi-parallel, compressed structure May 26, 2025 - INPC Daejeon
CeF2+ - Brief Look at Quantum Control Ce140 I = 0 Not sensitive to nuclear-spin- dependent P, T P, T Odd effects Sensitive to nuclear-spin- dependent P, T P, T Odd effects Leads to larger mf and additional hyperfine structures Higher complexity leads to more challenges in the development of a measurement scheme but also provides more opportunities I 0 Ce141 May 26, 2025 - INPC Daejeon
Relevant BSM Framework May 26, 2025 - INPC Daejeon
TITANs MRTOF Analyzer Section May 26, 2025 - INPC Daejeon
Which Molecule is Most Suitable? Species of Interest Schiff Scaling Factor (relative to 225Ra) Actinide := 1 (~200x larger than 199Hg) 225Ra 229Th 2 227Ac 6 229Pa 40 Fluorine Protactinium May 26, 2025 - INPC Daejeon
Experimental Development May 26, 2025 - INPC Daejeon
CeF2+ - Formation and Stability May 26, 2025 - INPC Daejeon
Enhanced Sensitivity Radioactive molecules Enhanced Schiff Moment Enhancement factors in our approach: octupole deformed nuclide x 100-1,000 in polar molecule in atom or ion trap x 1,000 compared to beam experiments Compared to spherical atomic nuclei (Hg) x 1,000-10,000 +3 Experimentally observed Molecule Predicted All known cases are radioactive UF3+ ThF3+ - Laser coolable! Fluorine AcF3+ - PaF3+ - Protactinium https://doi.org/10.48550/arXiv.2203.10333 May 26, 2025 - INPC Daejeon
Summary The observation of an EDM of any kind would indicate CP violation and possibly lead to BSM physics PaF3+ represents a system which is expected to exhibit extreme sensitivity to P, T - odd effects inside the nucleus Due to the difficulty in producing protactinium beams, CeF2+ was chosen as a surrogate in order to develop production techniques and measurement schemes Using ab initio methods, the electronic structure of CeF2+ has been shown to have many similarities to that of PaF3+,confirming the value of the more stable molecule CeF2+ has been produced at the TITAN facility at TRIUMF, representing the first step to exploiting the opportunities present in this system Next Steps Continue developing techniques for various CeF2+ and PaF3+ production mechanisms Port these techniques over to an offline set up in which laser spectroscopy is more feasible May 26, 2025 - INPC Daejeon
Summary The observation of an EDM of any kind would indicate CP violation and possibly lead to BSM physics PaF3+ represents a system which is expected to exhibit extreme sensitivity to P, T - odd effects inside the nucleus Due to the difficulty in producing protactinium beams, CeF2+ was chosen as a surrogate in order to develop production techniques and measurement schemes Using ab initio methods, the electronic structure of CeF2+ has been shown to have many similarities to that of PaF3+,confirming the value of the more stable molecule CeF2+ has been produced at the TITAN facility at TRIUMF, representing the first step to exploiting the opportunities present in this system Next Steps Continue developing techniques for various CeF2+ and PaF3+ production mechanisms Port these techniques over to an offline set up in which laser spectroscopy is more feasible May 26, 2025 - INPC Daejeon
