# Chameleon Fragmentation

Abstract : A scalar field dark energy candidate could couple to ordinary matter and photons, enabling its detection in laboratory experiments. Here we study the quantum properties of the chameleon field, one such dark energy candidate, in an "afterglow" experiment designed to produce, trap, and detect chameleon particles. In particular, we investigate the possible fragmentation of a beam of chameleon particles into multiple particle states due to the highly non-linear interaction terms in the chameleon Lagrangian. Fragmentation could weaken the constraints of an afterglow experiment by reducing the energy of the regenerated photons, but this energy reduction also provides a unique signature which could be detected by a properly-designed experiment. We show that constraints from the CHASE experiment are essentially unaffected by fragmentation for $\phi^4$ and $1/\phi$ potentials, but are weakened for steeper potentials, and we discuss possible future afterglow experiments.
Document type :
Preprints, Working Papers, ...

https://hal-cea.archives-ouvertes.fr/cea-00983454
Contributor : Emmanuelle de Laborderie <>
Submitted on : Friday, April 25, 2014 - 12:03:25 PM
Last modification on : Wednesday, September 12, 2018 - 2:13:46 PM

### Identifiers

• HAL Id : cea-00983454, version 1
• ARXIV : 1312.2747

### Citation

Philippe Brax, Amol Upadhye. Chameleon Fragmentation. 2013. ⟨cea-00983454⟩

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