Neutron Interferometry constrains dark energy chameleon fields

Abstract : We present phase shift measurements for neutron matter waves in vacuum and in low pressure Helium using a method originally developed for neutron scattering length measurements in neutron interferometry. We search for phase shifts associated with a coupling to scalar fields. We set stringent limits for a scalar chameleon field, a prominent quintessence dark energy candidate. We find that the coupling constant $\beta$ is less than 1.9 $\times10^7$~for $n=1$ at 95\% confidence level, where $n$ is an input parameter of the self--interaction of the chameleon field $\varphi$ inversely proportional to $\varphi^n$.
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http://hal.in2p3.fr/in2p3-01120940
Contributeur : Emmanuelle Vernay <>
Soumis le : vendredi 27 février 2015 - 08:26:28
Dernière modification le : mardi 22 mai 2018 - 21:48:09

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H. Lemmel, Philippe Brax, A. N. Ivanov, T. Jenke, G. Pignol, et al.. Neutron Interferometry constrains dark energy chameleon fields. Physics Letters B, Elsevier, 2015, 743, pp.310-314. 〈10.1016/j.physletb.2015.02.063〉. 〈in2p3-01120940〉

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