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Three-body parameter for Efimov states in 6Li.

Huang, B. and O'Hara, K. M. and Grimm, R. and Hutson, J. M. and Petrov, D. S. (2014) 'Three-body parameter for Efimov states in 6Li.', Physical review A., 90 (4). 043636.


We present a state-of-the-art reanalysis of experimental results on Efimov resonances in the three-fermion system of Li6. We discuss different definitions of the three-body parameter (3BP) for Efimov states and adopt a definition that excludes effects due to deviations from universal scaling for low-lying states. We develop a finite-temperature model for the case of three distinguishable fermions and apply it to the excited-state Efimov resonance to obtain the most accurate determination to date of the 3BP in an atomic three-body system. Our analysis of ground-state Efimov resonances in the same system yields values for the three-body parameter that are consistent with the excited-state result. Recent work has suggested that the reduced 3BP for atomic systems is a near-universal quantity, almost independent of the particular atom involved. However, the value of the 3BP obtained for Li6 is significantly (∼20%) different from that previously obtained from the excited-state resonance in Cs. The difference between these values poses a challenge for theory.

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Publisher statement:Reprinted with permission from the American Physical Society: Bo Huang (黄博), Kenneth M. O'Hara, Rudolf Grimm, Jeremy M. Hutson, and Dmitry S. Petrov (2014) 'Three-body parameter for Efimov states in 6Li.', Physical review A., 90 (4), 043636. © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:No date available
Date deposited:02 December 2014
Date of first online publication:October 2014
Date first made open access:No date available

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