title: Measurement of an Efimov trimer binding energy in a three-component mixture of 6Li.
abstract: The binding energy of an Efimov trimer state was precisely determined via radio-frequency association. It is found that the measurement results shift significantly with temperature, but that the shift becomes negligible at the lowest temperature in our experiment. The shift-free part of the trimer binding energy reveals a significant deviation from the nonuniversal theory prediction based on a three-body parameter with a monotonic binding-energy dependence.
authors.affiliation: Department of Physics, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. shuta@cat.phys.s.u-tokyo.ac.jp
authors.forename: Shuta
authors.initials: S
authors.lastname: Nakajima
authors.forename: Munekazu
authors.initials: M
authors.lastname: Horikoshi
authors.forename: Takashi
authors.initials: T
authors.lastname: Mukaiyama
authors.forename: Pascal
authors.initials: P
authors.lastname: Naidon
authors.forename: Masahito
authors.initials: M
authors.lastname: Ueda