Unveiling chameleon fields in tests of the gravitational inverse-square law

Amol Upadhye, Steven S. Gubser, Justin Khoury

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


Scalar self-interactions are known to weaken considerably the current constraints on scalar-mediated fifth forces. We consider a scalar field with a quartic self-interaction and gravitation-strength Yukawa couplings to matter particles. After discussing the phenomenology of this scalar field, we assess the ability of ongoing and planned experiments to detect the fifth force mediated by such a field. Assuming that the quartic and matter couplings are of order unity, the current-generation Eöt-Wash experiment at the University of Washington will be able to explore an interesting subset of parameter space. The next-generation Eöt-Wash experiment is expected to be able to detect, or to rule out, the fifth force due to such a scalar with unit quartic and matter couplings at the 3σ confidence level.

Original languageEnglish (US)
Article number104024
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number10
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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