The CHASE laboratory search for chameleon dark energy - High Energy Physics - ExperimentReport as inadecuate




The CHASE laboratory search for chameleon dark energy - High Energy Physics - Experiment - Download this document for free, or read online. Document in PDF available to download.

Abstract: A scalar field is a favorite candidate for the particle responsible for darkenergy. However, few theoretical means exist that can simultaneously explainthe observed acceleration of the Universe and evade tests of gravity. Thechameleon mechanism, whereby the properties of a particle depend upon the localenvironment, is one possible avenue. We present the results of the ChameleonAfterglow Search CHASE experiment, a laboratory probe for chameleon darkenergy. CHASE marks a significant improvement other searches for chameleonsboth in terms of its sensitivity to the photon-chameleon coupling as well asits sensitivity to the classes of chameleon dark energy models and standardpower-law models. Since chameleon dark energy is virtually indistinguishablefrom a cosmological constant, CHASE tests dark energy models in a manner notaccessible to astronomical surveys.



Author: Jason H. Steffen, for the GammeV-CHASE collaboration Fermilab Center for Particle Astrophysics

Source: https://arxiv.org/







Related documents