Theoretical study of 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>YbOH</mml:mi><mml:mprescripts /><mml:none /><mml:mn>173</mml:mn></mml:mmultiscripts></mml:math>
 to search for the nuclear magnetic quadrupole moment

Maison, D. E.; Skripnikov, L. V.; Flambaum, V. V.

doi:10.1103/physreva.100.032514

Cited by 56 publications

(69 citation statements)

References 42 publications

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“…Both eEDM and MQM result in a parity-and time-reversal-violating molecular EDM, although originating from different underlying physics. 2 The effective electric field (E eff ) and the time-reversal-violating magnetic quadrupole moment interaction constant (WM) relevant to these probes of BSM physics in YbOH are predicted to be similar to that of YbF [3][4][5] , which has been used previously for eEDM measurements 6 . The use of YbOH has experimental advantages due to the presence of parity doublets arising from the metastable, degenerate bending modes.…”

Section: Introductionmentioning

confidence: 79%

“…High resolution (∆λ ∼ 0.65 nm) dispersed laser induced fluorescence (DLIF) spectra and radiative decay curves of numerous bands detected in the medium resolution LIF excitation spectra were recorded. The vibronic energy levels of the 2 X + Σ  state were predicted using a discrete variable representation approach and compared with observations. The radiative decay curves were analyzed to produce fluorescence lifetimes.…”

Section: Introductionmentioning

confidence: 99%

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Branching Ratios, Radiative Lifetimes, and Transition Dipole Moments for YbOH

Mengesha

Steimle

et al. 2020

J. Phys. Chem. A

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Medium resolution (∆ν ∼ 3 GHz) laser-induced fluorescence (LIF) excitation spectra of a rotationally cold sample of YbOH in the 17300-17950 cm -1 range have been recorded using twodimensional (excitation and dispersed fluorescence) spectroscopy. High resolution (∆λ ∼ 0.65 nm) dispersed laser induced fluorescence (DLIF) spectra and radiative decay curves of numerous bands detected in the medium resolution LIF excitation spectra were recorded. The vibronic energy levels of the 2 X + Σ  state were predicted using a discrete variable representation approach and compared with observations. The radiative decay curves were analyzed to produce fluorescence lifetimes.DLIF spectra resulting from high resolution (∆ν < 10 MHz) LIF excitation of individual lowrotational lines in the 2 2 1/ 2 (0,0,0) (0,0,0)bands were also recorded. The DLIF spectra were analyzed to determine branching ratios which were combined with radiative lifetimes to obtain transition dipole moments. The implications for laser cooling and trapping of YbOH are discussed.3

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Branching Ratios, Radiative Lifetimes, and Transition Dipole Moments for YbOH

Mengesha

Steimle

et al. 2020

J. Phys. Chem. A

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“…Transverse Sisyphus cooling could also contribute directly to improvements in beam-based precision measurements by increasing the number of molecules probed while also allowing longer beam lines, and thus longer coherence times. Straightforward extension of the technique to 173 YbOH would be useful for proposed nuclear magnetic quadrupole moment measurements [13,54]. A more complex repumping scheme will be required in this case because each  = X N 1 ( )level will split into two closely spaced sets of three levels that are separated by approximately 6 GHz due to large 173 Yb (I=5/2) magnetic and nuclear electric quadrupole hyperfine interactions, similar to 173 YbF [72].…”

Section: Resultsmentioning

confidence: 99%

“…We create a theoretical simulation based on the optical Bloch equations and find excellent agreement with our experimental data. We discuss extensions of our approach to isotopologues of YbOH, including 173 YbOH, which have been proposed for use in measurements of the nuclear magnetic quadrupole moment [54]. Figure 1(a) shows a schematic diagram of the experimental apparatus.…”

Section: Introductionmentioning

confidence: 99%

Laser-cooled polyatomic molecules for improved electron electric dipole moment searches

et al. 2020

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Doppler and Sisyphus cooling of 174 YbOH are achieved and studied. This polyatomic molecule has high sensitivity to physics beyond the Standard Model and represents a new class of species for future high-precision probes of new T-violating physics. The transverse temperature of the YbOH beam is reduced by nearly two orders of magnitude to < 600 μK and the phase-space density is increased by a factor of > 6 via Sisyphus cooling. We develop a full numerical model of the laser cooling of YbOH and find excellent agreement with the data. We project that laser cooling and magneto-optical trapping of long-lived samples of YbOH molecules are within reach and these will allow a high sensitivity probe of the electric dipole moment of the electron. The approach demonstrated here is easily generalized to other isotopologues of YbOH that have enhanced sensitivity to other symmetryviolating electromagnetic moments.

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“…Finally, we characterize the enhancement in the 173 YbOH isotopologue, which has high sensitivity to the symmetry-violating nuclear magnetic quadrupole moment (NMQM) [3,53], by investigating the enhancement of different 173 YbOH hyperfine states when driving hyperfine transitions in atomic 173 Yb (I=5/2). The results are shown in figure 5(c).…”

Section: Resultsmentioning

confidence: 99%

Enhanced molecular yield from a cryogenic buffer gas beam source via excited state chemistry

et al. 2020

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We use narrow-band laser excitation of Yb atoms to substantially enhance the brightness of a cold beam of YbOH, a polyatomic molecule with high sensitivity to physics beyond the standard model (BSM). By exciting atomic Yb to the metastable 3 P 1 state in a cryogenic environment, we significantly increase the chemical reaction cross-section for collisions of Yb with reactants. We characterize the dependence of the enhancement on the properties of the laser light, and study the final state distribution of the YbOH products. The resulting bright, cold YbOH beam can be used to increase the statistical sensitivity in searches for new physics utilizing YbOH, such as electron electric dipole moment and nuclear magnetic quadrupole moment experiments. We also perform new quantum chemical calculations that confirm the enhanced reactivity observed in our experiment and compare reaction pathways of Yb( 3 P) with the reactants H 2 O and H 2 O 2 . More generally, our work presents a broad approach for improving experiments that use cryogenic molecular beams for laser cooling and precision measurement searches of BSM physics.

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Theoretical study of YbOH173 to search for the nuclear magnetic quadrupole moment

Cited by 56 publications

References 42 publications

Branching Ratios, Radiative Lifetimes, and Transition Dipole Moments for YbOH

Branching Ratios, Radiative Lifetimes, and Transition Dipole Moments for YbOH

Laser-cooled polyatomic molecules for improved electron electric dipole moment searches

Enhanced molecular yield from a cryogenic buffer gas beam source via excited state chemistry

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