Searching for chameleon-like scalar fields with the ammonia method
نویسندگان
چکیده
منابع مشابه
Strongly coupled chameleon fields: new horizons in scalar field theory.
We show that, as a result of nonlinear self-interactions, scalar field theories that couple to matter much more strongly than gravity are not only viable but could well be detected by a number of future experiments provided that they are properly designed to do so.
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Scalar fields with a "chameleon" property, in which the effective particle mass is a function of its local environment, are common to many theories beyond the standard model and could be responsible for dark energy. If these fields couple weakly to the photon, they could be detectable through the afterglow effect of photon-chameleon-photon transitions. The ADMX experiment was used in the first ...
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In rhis papec we address rhe problem of represenring rhe srmrure of the ropology of a d-dimensional scalar field LIS a basis for consrrucring a mulriresolurion represenrarion of rhe srrucrure of such afield. To rhis aim, we define a discrere decomposirion of a rriangulared d-dimensional domain, on whose verrices rhe values of rhefield ure given. We exrend a Smale decomposirion. defined by Thom ...
متن کاملBrans-Dicke Scalar Field as a Chameleon
In this paper it is shown that in Brans Dicke theory, if one considers a non-minimal coupling between the matter and the scalar field, it can give rise to a late time accelerated expansion for the universe preceded by a decelerated expansion for very high values of the Brans Dicke parameter ω.
متن کاملScalar radiation from chameleon-shielded regions.
I study the profile of the chameleon field around a radially pulsating mass. Focusing on the case in which the background (static) chameleon profile exhibits a thin shell, I add small perturbations to the source in the form of time-dependent radial pulsations. It is found that the chameleon field inherits a time dependence and there is a resultant scalar radiation from the region of the source....
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200913007