title: Search for chameleon scalar fields with the axion dark matter experiment.
abstract: Scalar fields with a "chameleon" property, in which the effective particle mass is a function of its local environment, are common to many theories beyond the standard model and could be responsible for dark energy. If these fields couple weakly to the photon, they could be detectable through the afterglow effect of photon-chameleon-photon transitions. The ADMX experiment was used in the first chameleon search with a microwave cavity to set a new limit on scalar chameleon-photon coupling βγ excluding values between 2×10(9) and 5×10(14) for effective chameleon masses between 1.9510 and 1.9525  μeV.
authors.affiliation: University of Washington, Seattle, Washington 98195, USA.
authors.forename: G
authors.initials: G
authors.lastname: Rybka
authors.forename: M
authors.initials: M
authors.lastname: Hotz
authors.forename: L J
authors.initials: LJ
authors.lastname: Rosenberg
authors.forename: S J
authors.initials: SJ
authors.lastname: Asztalos
authors.forename: G
authors.initials: G
authors.lastname: Carosi
authors.forename: C
authors.initials: C
authors.lastname: Hagmann
authors.forename: D
authors.initials: D
authors.lastname: Kinion
authors.forename: K
authors.initials: K
authors.lastname: van Bibber
authors.forename: J
authors.initials: J
authors.lastname: Hoskins
authors.forename: C
authors.initials: C
authors.lastname: Martin
authors.forename: P
authors.initials: P
authors.lastname: Sikivie
authors.forename: D B
authors.initials: DB
authors.lastname: Tanner
authors.forename: R
authors.initials: R
authors.lastname: Bradley
authors.forename: J
authors.initials: J
authors.lastname: Clarke