Self-interacting scalar fields and the Eot-Wash experiment
APA
Upadhye, A. (2006). Self-interacting scalar fields and the Eot-Wash experiment. Perimeter Institute. https://pirsa.org/06060047
MLA
Upadhye, Amol. Self-interacting scalar fields and the Eot-Wash experiment. Perimeter Institute, Jun. 13, 2006, https://pirsa.org/06060047
BibTex
@misc{ pirsa_PIRSA:06060047, doi = {10.48660/06060047}, url = {https://pirsa.org/06060047}, author = {Upadhye, Amol}, keywords = {Cosmology}, language = {en}, title = {Self-interacting scalar fields and the Eot-Wash experiment}, publisher = {Perimeter Institute}, year = {2006}, month = {jun}, note = {PIRSA:06060047 see, \url{https://pirsa.org}} }
University of Wisconsin–Madison
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Abstract
Experiments have ruled out unit-strength scalar-mediated fifth forces on scales ranging from 0.1 mm to 10,000 AU. However, allowing the scalar to have a quartic self-interaction weakens these constraints considerably. This weakening is due to the "chameleon mechanism", which gives the scalar field an effective mass that depends on the local matter density. I will describe the chameleon mechanism and discuss experimental constraints on self-interacting scalar fields. In particular, I will compare the chameleon-mediated self interaction to constraints from the Eot-Wash experiment, at the University of Washington, which comes closest to detecting such a scalar field today. It will be shown that a quartic self interaction of unit strength is just out of reach of the current Eot-Wash experiment, but will be readily visible to their next-generation instrument.